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UNITED STATES DEPARTMENT OF THE INTERIOR

GEOLOGICAL SURVEY

SUMMARIES OF DATA ON AND LISTS OF REFERENCES TO

METALLIC AND SELECTED NONMETALLIC MINERAL DEPOSITS

I N THE McCARTHY QUADRANGLE, ALASKA

Compi l ed by

Edward H. Cobb

and

Edward M . MacKevett, J r .

Open-file Repor t 80-885

1980

This report is preliminary and has not been e d i t e d or reviewed for c o n f o r m i t y with Geological Survey standards.

L n t r o d u c t i o n

These summaries o f d a t a on m e t a l l i c a n d s e l e c t e d n o n m e t a l l i c

m i n e r a l o c c u r r e n c e s and l i s t s of s e l e c t e d r e f e r e n c e s t o them i n

G e o l o g i c a l Su rvey , U.S. Bureau of Mines, and S t a t e o f Alaska Div-

i s i o n of G e o l o g i c a l and Geophys i ca l Su rveys (and p r e d e c e s s o r S t a t e

and T e r r i t o r i a l a g e n c i e s ) r e p o r t s and maps and a v e r y few j o u r n a l

a r t i c l e s a r e d e s i g n e d t o a i d i n l i b r a r y r e s e a r c h on t h e m i n e r a l re -

s o u r c e s of t h e McCarthy q u a d r a n g l e , Alaska . The r e f e r e n c e s l i s t e d

a r e s e l e c t e d i n t h e s e n s e t h a t main ly s c a t i s t i c a l r e p o r t s such a s

t h e a n n u a l M i n e r a l s Yearbook of the U.S. Bureau of Mines and many

a n n u a l and b i e n n i a l r e p o r t s of t h e Alaska D i v i s i o n of G e o l o g i c a l

and Geophys i ca l Su rveys and i t s p r e d e c e s s o r a g e n c i e s a r e n o t in-

c luded . A l so n o t i n c l u d e d a r e d a t a on c l a i m s about which l i t t l e

more t h a n t h e i r l o c a t i o n s i s known ( f o r example, l o c a l i t i e s 126-

130 i n MacKevett and Holloway, 1 9 7 7 (OF 77-1696). These o m i s s i o n s

s h o u l d n o t be i n t e r p r e t e d a s a judgement c h a t t h e c l a i m s a r e n o t on

v a l i d m i n e r a l o c c u r r e n c e s , bu t o n l y t h a t t h e r e a r e i n s u f f i c i e n t d a t a

t o d e s c r i b e any m i n e r a l d e p o s i t s t h a t might be p r e s e n t . Geochemical

anoma l i e s de t e rmined by a n a l y s e s o f r ock and scream-sediment samples

i n which no m e t a l l i c m i n e r a l was i n d e n c i f i e d are a l s o o m i r t e d .

T h i s r e p o r t is d i v i d e d i n t o t h r e e p a r t s : a s e c t i o n made up of

summaries o f d a r a and r e f e r e n c e l i s t s a r r a n g e d a l p h a b e t i c a l l y by

o c c u r r e n c e name; a second s e c t i o n t h a t l i s t s synonyms f o r names i n

t h e f i r s t s e c t i o n , t h e names of owners and o p e r a t o r s o f mines and

p r o s p e c t s , and c l a i m names; and a f i n a l s e c t i o n that l i s t s a l p h a b e t -

i c a l l y by a u t h o r a l l r e f e r e n c e s ment ioned i n t h e f i r s t s e c t i o n and

i n t h e s e i n t r o d u c t o r y p a r a g r a p h s .

The f i r s t s e c t i o n c o n s i s t s of d a t a on e a c h o c c u r r e n c e , f o r each

of which t h e r e is a page t h a t g i v e s t h e name of t h e o c c u r r e n c e , t h e

m i n e r a l commodit ies p r e s e n t ( l i s t e d a l p h a b e t i c a l l y ) ; t h e mining d i s -

t r i c t (Ransome and Kerns , 1954 ( L C 7 6 7 9 ) ) i n which rhe o c c u r r e n c e i s

l o c a t e d ; t h e name of t h e l : 2 5 0 - s c a l e topograph ic quad rang le (McCar thy) ;

c o o r d i n a t e s ( a s d e s c r i b e d by Cobb and Kachadoor i an , 1961 ( B 1 1 3 9 ) ,

p . 3-4); t h e number of a map ( i f t h e r e i s one) on which t h e o c c u r -

r e n c e i s shown and t h e number of t h e o c c u r r e n c e on t h a t map, and

t h e l a t i t u d e and l o n g i t u d e o f t h e o c c u r r e n c e . Most of t h e occur-

r e n c e s i n t h i s r e p o r t a r e shown and d e s c r i b e d i n MacKevett , 1976

(MF-773B). These d a t a , p r e s e n t e d a t t h e t o p o f t h e page , a r e Eol-

lowed by a s h o r t , g e n e r a l summary of t h e p u b l i s h e d d a t a on the occur-

r e n c e , w i t h t h e s o u r c e o r s o u r c e s of t h e i n f o r m a t i o n c i t e d i n b r a c k e t s .

T h i s i s fo l l owed by a l i s t , a r r a n g e d c h r o n o l o g i c a l l y , o f r e f e r e n c e s t o

t h e o c c u r r e n c e .

P rope r names of mines , p r o s p e c t s , and o t h e r m i n e r a l o c c u r r e n c e s

a r e g i v e n i f such names a p p e a r i n t h e r e p o r t s c i t e d . I f a d e p o s i t

does n o t have such a name, b u t i s n e a r a named g e o g r a p h i c f e a t u r e ,

t h e name of t h a t f e a t u r e i s shown i n pa r - en theses i n l i e u oE a p r o p e r

name i f no a m g i b u i t y would r e s u l t . A l l p l a c e r mines and p r o s p e c t s a r e

c o n s i d e r e d unde r t h e name of t h e s t r e a m on which t h e y a r e l o c a t e d . I f

a d e p o s i t h a s no p r o p e r name and i s n o t n e a r a named g e o g r a p h i c Eea ru re ,

i t is t i t l e d "Unnamed p r o s p e c t " o r "Unnamed occu r r ence" and a p p e a r s a t

t h e end of t h e l i s t . I f a p a r t o f a p r o p e r name i s n o t a lways used i n

r e f e r e n c e s , t h a t p a r c of the name i s shown i n p a r e n t h e s e s . T h i s is

most common i n company names.

C i t a t i o n a r e g i v e n i n s t a n d a r d b i b l i o g r a p h i c format w i r h t h e

e x c e p r i o n t h a t r e f e r e n c e s t o r e p o r t s and maps i n numbered p u b l i c a t i o n

s e r i e s a l s o show i n p a r e n t h e s e s an a b b r e v i a t i o n f o r t h e r e p o r t o r map

s e r i e s and t h e r e p o r t o r map number . A b b r e v i a r i o n s used a r e :

AOF Alaska D i v i s i o n of G e o l o g i c a l and Geophys i ca l Su rveys Open- f i l e Repor t

B U.S. G e o l o g i c a l Survey B u l l e t i n BMB U.S. Bureau of Mines B u l l e t i n C U.S. G e o l o g i c a l Survey C i r c u l a r G C Alaska D i v i s i o n of G e o l o g i c a l and Geophys i ca l Su rveys

( and p r e d e c e s s o r S t a t e a g e n c i e s ) Geochemical R e p o r t I U.S. G e o l o g i c a l Survey M i s c e l l a n e o u s Geo log ic I n v e s t i -

g a t i o n s Map I C U.S. Bureau of Mines I n f o r m a t i o n C i r c u l a r

0 F U.S. Geological S u r v e y Open-file R e p o r t (numbers with a hyphen i n them a re f o r m a l ; numbers w i t h o u t a hyphen a r e i n f o r m a l and a r e used o n l y w i t h i n t h e Branch of Alaskan Geology o f t h e U.S. G e o l o g i c a l Survey)

MF U.S. G e o l o g i c a l S u r v e y Miscel laneous F i e l d S t u d i e s Map P U.S. G e o l o g i c a l Survey P r o f e s s i o n a l Pape r TDM Alaska T e r r i t o r i a l Department o f Mines Pamphlet USBM OF U.S. Bureau o f Nines Open - f i l e Repor t

( A m y Cr. ) Copper

C h i s t o c h i n a district MF-773B, L O C . 163

Summary: Severa l old prospects on pyrite-bearing veins and altered zones in Permian sedimentary rocks and gabbro; local secondary copper minerals. Semiquantitative s p e c t r o g r a p h i c analy- s e s of selected samples indicated as much as 1.5 ppm Ag and 2,000 ppm Cu. [ ~ a c ~ e v e t t , 1976 ( ~ ~ - 7 7 3 ~ ) ] Includes references to (Arnes Cr.).

References M o f f i t and Maddren, 1908 ( 3 3 4 5 ) , p . 137-138 Moffit, 1909 ( B 3791, p . 156 Moffit and Maddren, 1909-(B 3 7 4 ) , p . 55 M o f f i t and Mertie, 1923 (B 745), p . 104 Berg and Cobb, 1967 (B 1 2 4 6 ) , p . 44 MacKevett, 1976 (MF-773B), l o c . 163 XacKevett and Holloway, 1977 (OF 77-169~), p. 35, l o c . 99 MacKevett and others, 1978 (GQ-1418), Lot. 10

( B a r n a r d G l a c i e r ) I r o n

Nizina d i s c r i c t MF-773B, l o c . 28

Summary: Magnetite-rich skarn in Permian marble near contact with upper Pa leozo ic monzonite. [ ~ a c ~ e v e t t , 1976 ( ~ ~ - 7 7 3 ~ ) ]

References MacKevett, 1976 (MF-773B), l o c . 2 8 MacKevett and Holloway, 1977 (OF 7 7 - 1 6 9 ~ ) , p . 3 0 , l o c . 8

Bear Paw Copper(?

Nizina d i s t r i c t McCarthy ( 1 2 . 5 , 6 .85 ) a p p r o x . 6 1 ° 2 3 ' ~ , 1 4 2 O 3 1 ' ~ a p p r o x .

Summary: C l a i m h e l d by Alaska U n i t e d Copper E x p l o r a t i o n CO. [ ~ i l l e r , 1946 (B 9 4 7 - ~ ) ] No o t h e r data on p r o s p e c t .

References Mil ler , 1946 ( B 9 4 7 - F ) , p . 120 Berg a n d Cobb, 1967 ( B 1 2 4 6 1 , p . 62

(Beaver Cr.) C o p p e r , G o l d

Chisana d i s t r i c t MF-773B, l o c s . 186, 188

McCarthy (24.0-24.5, 17.5-17.8) 61'58'-61'59 'N, 141°02'-~41005 'W

Summary: Gold p l a c e r a t MF-773B, loc. 186, d i s c o v e r e d i n 1902, b u t n o t mined. At MF-773B, l o c . 188, p y r i t e and c h a l c o p y r i t e occur a s d i s s e m i n a t i o n s and v e i n l e t s i n g r a n o d i o r i t e o f t h e Cre t aceous Klein Creek p l u t o n and i n h o r n f e l s penden t s that a r e mainly n e a r a shear zone. [ ~ n a e b e l , 1970 (GC 2 1 ) ; Mac- Kevett, 1976 (MF-773~)] See also Wiley.

Refe rences Knaebel, 1970 ( G C 2 1 ) , p . 13, 16, 51 MacKevetr, 1976 (MF-773B), lots* 186, 188 MacKevett and Holloway, 1977 (OF 77-169A) , p . 3 6 , lots* 1 2 2 , 124

(Berg Cr.) Copper, Gold, Iron, Silver

Chistochina district MF-773B, locs. 107, 108

Summary: Upper workings (MF-773B, loc. 107) are on contact-metamorphic and vein deposits in metamorphosed Triassic Nizina Ls. adjacent to granodiorite-quartz diorite pluton; deposits contain magnetite, pyrite, and chalcopyrite. Lower workings (MF-773B, loc. 108) are on quartz veins and skarn in metamorphosed Triassic Chitistone Ls. near contact with granodiorite and quartz diorite; the quartz veins contain pyrite and chalcopyrite and are gold and silver bearing. Grab sample of a vein contained 8 pprn Au, 10 pprn Ag, 1,000 pprn Cu, and 20 pprn Mo. The skarn consists of magnetite and epidote with irregularly distributed pyrite and chalcopyrite; a grab sample of it contained 0.6 pprn Au, 1.5 pprn Ag, 20,000 pprn Cu, and 500 pprn Co. Explored by 2 adits; small token production of gold and silver. [~ac~evett, 1976 (MF-773B) ; MacKevett and others, 1978 (GQ-1418)] Includes references to: Berg, Midas, North Midas (Copper Co.) .

References Moffit, 1913 ( B 542), P . 83 ~rooks, 1914 ( B 592), p. 61 Moffit, 1915 (B 622), p. 114 Brooks, 1916 ( B 642), p. 54 Smith, 1917 (BMB 153), p . 33 Moffit, 1918 ( B 6 6 2 ) , p. 160 Martin, 1920 (B 712), p . 15, 31-32 Brooks, 1921 ( B 7141, p. 30 Moffit, 1921 ( B 714), p. 191-192 Brooks, 1922 (B 7 2 2 1 , p. 38 Moffit and Mertie, 1923 ( B 745), p. 140-146 Brooks and Capps, 1924 (B 7 5 5 ) , p . 26 Moffit, 1924 (B 7551, p . 65, 68-71 Brooks, 1925 (B 7731, p. 1 5 , 37 Smith, 1926 ( B 7831, p . 7-8 Moffit, 1938 (B 8 9 4 ) , p . 117, 122-123, 126-127, 129 Van Alstine and Black, 1946 (B 947-GjY p . 140-141 Berg and Cobb, 1967 (B 1 2 4 6 ) , p . 41-42 MacKevett and Cobb, 1972 (MF-395), loc. 27 Henning and Dobey, 1973 (AOF 25), p . 7 MacKevett, 1976 (MF-773B), locs. 107, 108 MacKevect and Holloway, 1977 (OF 77-169A), p . 33, locs. 60, 61 MacKevett and ochers, 1977 ( C 739), p . 4 MacKevett and others, 1978 (GQ-1418), loc. 36

Big Horn Copper

C h i s t o c h i n a d i s t r i c t MF-773B, l o c . 157

Summary: B o r n i t e - , c h a l c o c i t e - , and m a l a c h i t e - b e a r i n g v e i n s and pods i n i n t e n s e l y f a u l t e d T r i a s s i c N i k o l a i Greens tone . Explored by s eve ra l adits and numerous s u r f i c i a l work- i n g s . [ ~ a c ~ e v e t t , 1976 ( M F - 7 7 3 ~ 1 1 I n c l u d e s r e f e r e n c e s t o : Alaska Uni ted Copper E x p l o r a t i o n Co. n e a r Kuskulana G l a c i e r , F i n c h .

R e f e r e n c e s M o f f i t , 1915 (B 6 2 2 ) , p . 113-114 M o f f i t , 1918 (B 6 6 2 ) , p . 158-159 M o f f i t and M e r t i e , 1923 ( B 7 4 5 ) , p . 90-91, 133-135 Van A l s t i n e and Black, 1946 ( B 9 4 7 - G ) , p. 137-138 Berg and Cobb, 1967 (B 1 2 4 6 ) , p . 43 MacKevetr and Cobb, 1972 (MF-395), l a c . 2 1 MacKevett , 1976 (MF-773B), lot. 1 5 7 MacKevett and Holloway, 1977 (OF 77-169A), p . 35, l o c . 95

B l u e S c a r Copper

Nizina d i s t r i c t MF-773B, LOG. 29

Summary: Disseminated pyrite in schist of upper P a l e o z o i c Skolai Gp.; minor coppe r staining.

Reference MacKevett, 1976 (MF-773B), l o c . 29

Bremner Mining Go. Gold , Lead

Nizina dictrict McCarthy ( 4 . 9 - 4 . 9 5 , 0.9-1.05) MF-773B, locs. 23, 26 61'03 'N, 143'25 'W

Summary: 2 mines; total of more than 700 m of underground workings, but only small production. Gold, pyrite, and galena in quartz veins as much as 1 rn thick and in gouge and com- minuted vein quartz along a felsic dike. Veins and dike cut mecasedirnen~ary rocks of Mesozoic Valdez Gp. [MCK~V- ett, 1976 (MF-773B); Moffit, 1938 (B 894)] Includes references to: Golconda, Grand Prize, Lucky Girl, Mammoth, Ramer Bros., Ramos Bros . , and general r e f e r e n c e s to lode gold deposits near head o f Golconda Cr.

References MoEfit, 1912 ( B 520) , pe 98299 Moffic, 1914 (B 5 7 6 ) , 49-50 Smich, 1933 (B 8 4 4 - A ) , p . 22 Smith, 1934 (B 857-A), p . 21 S m i t h , 1934 (B 86G-A), p . 24 Smith, 1936 (B 868-A), p . 24 Moffit, 1937 ( B 880-B), p . 99-101 Smith, 1937 ( B 880-A), p. 28 Moffit, 1938 ( B 894), p . 1.28 Smith, 1938 ( B 897-A), p . 35 Smith, 1939 (B 910-A), p . 31-32 Berg and Cobb, 1967 ( B 12461, p . 63 MacKevett and Cobb, 1972 (MF-395), loc. 31 Cobb, 1973 ( B 1 3 7 4 ) , p . 31-32 MacKevett, 1976 (MF-773B), locs. 23, 24 MacKevett and Holloway, 1977 (OF 77-169h), p MacKevett and others, 1977 (C 739), p . 4

30, loc. 7

(Calamity G u l c h ) Gold

Nizina district MF-773B, ~ O C . 37

Summary: Was some n o t particularly successful placer mining before 1909. offit it and C a p p s , 1911 ( B 4 4 8 ) ] See a l s o (Young Cr.).

References Moffit and C a p p ~ , 1911 ( B 4481, 108 MacKevett and* Cobb, 1972 ( ~ ~ - 3 9 5 j , Zoc. 91 MacKevett, 1976 ( M F - ? ~ ~ B ) , l o c . 37 MacKevect a n d Holloway, 1 9 7 7 (OF 77-16981, p . 30, l o c . 11

Calcite Copper

Chistochina district MF-773B, Loc. 106

Summary: In brecciated fault zone in Triassic Chitistone Ls. near contact with Jurassic granodiorite; fault zone contains abundant serpentine minerals and sparsely distributed pyrite, chalcopyrite, and secondary copper minerals. Explored by short adit. [~ac~evett, 1976 (MF-773B); MacKevetr and others, 1978 (GQ-1418)] Includes references to (MacDougall c . ) S e e also War Eagle.

References Moffit, 1921 (B 7 1 4 ) , p . 192 Moffit and Mertie, 1923 (B 7451, p. 137-139 Moffit, 1924 ( B 7 5 5 ) , p . 65-66 Van Alstine and Black, 1946 (B 947-G), p. 140 Berg and Cobb, 1967 ( B 12461, p . 42 MacKevett and Cobb, 1972 (MF-395), lot. 25 MacKevett, 1976 (MF-773B), loc. 106 MacKevett and Holloway, 1977 (OF 77-1698), p. 33, loc. 59 MacKevet t and others, 1978 (GQ-1418), loc. 37

(Canyon C r . ) Gold, Molybdenum

Nizina district McCarrhy (15.0-17.05, 2.5-5.75) MF-773B, l o c s . 33, 35, 44 61°081-61019'~, 141'58 ' - 1 4 ? 0 1 3 ' ~

Summary: P l a c e r gold was mined at 61°08'N, 142013~W (15.0, 2.5) [MF- 773B, loc. 3 3 1 . F1oa.t boulders of Tertiary granodiorire containing molybdenite-bearing quartz veins are common on moraines of Canyon Creek Glacier at 61°i6'N, 142O08'w (15.75, 5.0) [MF-7733, loc. 351. Molybdenite in quarcz vein as much as 8 ft. thick; greatest concentration of molybdenite in 1-ft. width near one o f walls; at about 61°19'N, 141°58'W (17.05, 5.75) [MF-~?~B, loc. 443. [~ac~evett, 1976 (MF-773~11; Smith, 1942 ( B 926-c) ]

References Brooks, 1916 ( B 6421, p . 54 Moffit, 1916 ( B 662), p . 135 Brooks, 1918 (B 662), p . 25 Moffit, 1918 (B 6751, p. 79 Brooks, 1919 (B 6661, p . 98 Brooks, 1921 (B 7 1 4 ) , p. 41 Joesring, 1941 (TDM I ) , p * 30 Smith, 1942 (B 926-C), p . 182-183 Berg and Cobb, 1967 ( B 1246), p. 64 MacKevett and Cobb, 1972 (MF-3951, 10~s. 77, 96 Cobb, 1973 (B 13741, p . 30 Henning and Dobey, 1973 (AOF 25), p . 7 MacKevett, 1976 (MF-773B), locs. 3 3 , 35, 44 MacKevet~ and Holloway, 1977 (OF 77-169A), p . 30, locs. 9, 13

(Chititu C r . ) Anrimony, Copper, Gold, Lead, Silver

Nizina district MF-773B, loc. 39

Summary: Creek and tributaries (Rex and White Creeks and Bligh and Jolly Gulches) source of more than half of the estimated 143,500 oz. of placer gold produced from the district. Mining began in 1901; has been some recently. Gold in both bench (glacial material) and scream placers; richest stream placers contain gold reconcentrated from benches. Concen- trates conrain gold, native copper, native silver, galena, stibnite, and native lead (most if not all derived from lead shot). Basin mainly underlain by Cretaceous marine sedimentary rocks intruded by a few small bodies of Tertiary granodiorite. [~ac~evett, 1976 (MF-773B); Moffit and Capps, 1911 ( B 4b8); MacKevett, 1978 (I-1032)] See also: (Rex Cr.), (White Cr.).

References

Mendenhall and Schrader, 1903 ( P 1 5 ) , p . 60, 63 Mendenhall, 1905 ( P 41), p . 118-119 Purington, 1905 (B 2 6 3 ) , p . 207 Moffit and Maddren, 1908 (B 3 4 5 ) , p. 172-173 Moffit, 1909 (B 3791, p. 156 Moffit and Maddren, 1909 (B 374), p. 45, 95-97 Moffit, 1910 (B 4421, p. 158, 162-163 Moffit and Capps, 1911 (B 4 6 8 ) , p. 76, 80, 98-100, 103-107 Moffit, 1912 (B 520), p. 107 Moffit, 1913 ( B 5421, p . 84-85 Brooks, 1914 (B 592), p. 61-62 Moffit, 1915 (B 6 2 2 ) , p. 104, 115-117 Brooks, 1916 (B 6491, p . 62-63 Smith, 1917 (BMB 153) , p . 3 3 Brooks, 1918 (B 6 6 2 ) , p . 43 Moffit, 1921 (B 7141, p. 196 Brooks, 1922 (B 722), p . 39 Brooks and Capps, 1924 ( B 7 5 5 ) , p . 27-28 Moffit, 1924 ( B 7 5 5 ) , p. 69-71 Smith, 1926 (B 783), p . 12 Moffit, 1927 (B 792), p. 15, 29 Smith, 1929 (B 797), p . 16-17 Smirh, 1930 (B 8101, p. 21 Smith, 1930 (B 813), p. 24 Smith, 1932 (B 824), p. 28 Smith, 1933 ( B 8 3 6 ) , p . 27 Smith, 1933 ( B 84&-A), p. 28 Smith, 1934 ( B 8 5 7 - A ) , p . 26

(Chititu Cr.) -- c a n c .

S m i t h , 1934 ( B 8 6 4 - A ) , p . 30 Smith, 1936 (B 868-A), p . 31 Moffit, 1937 (B 880-B), p. 98 Smith, 1937 ( B 880-A), p . 34 Moffir, 1938 (B 894), p. 125-126, 128-131 Smith, 1938 (B 897-A), p . 40-41 Smith, 1939 (B 910-A) , p. 38 Miller, 1946 (B 947-F) , p . 98 MacKevett , 1965 (1-438) Berg and Cobb, 1967 ( B 12461, p . 53 Koschmann and Bergendahl, 1968 (P 610), p. 14 M a c K e v e t ~ and Smith, 1968 ( C 6 0 4 ) , p . 3 MacKevett and Cobb, 1972 (MF-395), loc. 90 Cobb, 1973 ( 0 1374), p. 30 Henning and Dobey, 1973 ( A O F 2 5 ) , p . 7 MacKevetc, 1976 (MF-773B), loc. 39 MacKevett and Holloway, 1977 (OF 77-169~), p. 30, loc. 12 MacKevett and others, 1977 ( C 739), p . 4-5 Singer and MacKevett, 1977 (MF-773C)

(Chokosna R . ) C o p p e r ( ? )

C h i s t o c h i n a district McCarthy ( 2 . 1 , 9 . 0 ) ( ? ) 6 1 ° 3 1 ' ~ , 1 4 3 ' 3 8 ' ~ ( ? )

Summary: Two groups of claims owned by Mount Wrangell Copper Co. o off it, 1921 (B 7 1 4 ) ] See also Kinney-Golden.

References Moffit, 1910 ( B 4 4 2 ) , p . 1 6 1 Moffit, 1921 ( B 7141, p . 193

(Clear C r . ) Copper, Gold, Lead, Silver

Chistochina district McCarthy (1.25-1.45, 10.7-11.2) MF-773B, locs. 133, 136-138 61~37'-61~38'N, 143°50'-143051'~

Summary: Explored by Great Northern Development Co. before 1917; 3 adits with a total length of 5,600 f t . ; several shorter adits also. Deposits veins as much as 2 m wide along faults in Triassic Nikolai Greenstone and Jurassic granodiorite. Pyrite and chalcopyrite in veins and as disseminations in greenscone and granodiorite. Small amounts of bornite, chalcocite, covellite, malachite, and azurite and a few grains of galena also present. Chip sample across a vein contained 0.5 ppm Au and 5 ppm Ag. [~ac~evett, 1976 (MF-773B); Van A l s c i n e and Black, 1946 (B 9 4 7 4 ) ; Berg and Cobb, 1967 (B 1246)] I n c l u d e s references to: Copper Moun- tain, Great Northern Development Co. See also ( p o r c u p i n e Cr.).

References Schrader and Spencer, 1901, p. 84 Hendenhall and- Schrader, 1903 (P 151, p. 18 Moffit, 1909 ( B 3791, p. 156 Moffit, 1910 ( B 6421, p. 161 Moffit, 1912 ( B 520), p . 106 Moffit, 1913 (B 5 4 2 ) , p. 82-83 Brooks, 1914 (B 5921, p . 61 Moffit, 1915 (B 6 2 2 ) , p. 113 Brooks, 1916 ( B 642), p. 54 Smith, 1917 (BMB 142), p . 37, 52 Smith, 1917 (BMB 1531, p. 30 offi it, 1918 (B 662), p . 157-158 Martin, 1920 ( B 712), p. 29-30 Moffit and Mertie, 1923 ( 8 7 4 5 1 , p - 9 4 , 126-128 Moffit, 1924 (B 7 5 5 ) , p. 66 Noffit, 1938 (B 896), p . 123 Van Alstine and Black, 1946 ( B 947-G), p . 132-136 Berg and Cobb, 1967 (B 1246), p . 41-42 MacKevert and Cobb, 1972 (MF-395), locs. 17, 18 [loc. 17 misidentified

in table] MacKevett, 1976 (MF-773B), locs. 133, 136-138 MacKevett and Holloway, 1977 (OF 77-16981, p. 34, locs. 81, 83, 84 MacKevett and others, 1978 (GQ-1418), locs. 20-22, 25

(Contact Gulch) Copper


Summary: Old s u r f i c i a l prospects in Triassic Nikolai Greenstone. Explored scattered bornite-bearing veinlets and malachite surface coatings. [ ~ a c ~ e v e t t , 1976 ( M F - 7 7 3 ~ 1 1

References Moffit and Maddren, 1908 (B 3 4 5 ) , p. 167 Moffit and Maddren, 1909 ( B 3 7 4 ) , p. 90 Miller, 19b6 (B 947-F) , p . 120 Berg and Cobb, 1967 ( B 1 2 4 6 ) , p. 60 MacKevett and Cobb, 1972 (MF-395), l o c . 54 [ ~ r r o r ; location shown

is for Houghron Alaska Exploration Co. (Chitistone R. ) ] MacKevet t , 1976 (MF-773B), l o c . 82 MacKevett and Holloway, 1977 (OF 77-16981, p. 3 2 , loc. 45

(Copper Cr.) C o p p e r , Gold

N i z i n a d i s t r i c t MF-773B, l o c . 49

Summary: Va l l ey rough ly f o l l o w s f a u l t c o n t a c t between T r i a s s i c lime- s t o n e s and g r e e n s t o n e t o n o r t h and younger Mesozoic sedimen- t a r y rocks c u t by T e r t i a r y h y p a b y s s a l rocks to s o u t h . Gold e v i d e n t l y a l l d e r i v e d f rom s o u t h ; o n l y t r i b u t a r y g u l c h e s from s o u t h and m a i n s t r e a m c a r r y g o l d . Copper undoub ted ly d e r i v e d f r o m N i k o l a i Greens tone t o n o r t h . Only s t r e a m p lacers ; no bench d e p o s i t s . [ ~ a c ~ e v e t t and S m i t h , 1 9 7 2 (GQ-943); Mof- f i t and C a p p s , 1911 ( 8 448); MacKevett , 1976 ( ~ ~ - 7 7 3 ~ ) ] Much o f p r o d u c t i o n u n d o u b t e d l y r e p o r t e d w i t h t h a t f r o m Dan C r . , i n t o which Copper C r . f l o w s . I n c l u d e s r e f e r e n c e s t o : ( I d a h o G u l c h ) , h a d e r G u l c h ) , G e a t t l e G u l c h ) . See a l s o (Dan Cr.).

References M o f f i t , 2910 (0 4 4 2 ) , p. 1 6 2 M o f f i t and Capps, 1911 (B 4481, p . 100-101 M o f f i t , 1912 (B 5201, p . 107 M o f f i t , 1913 ( B 5 4 2 ) , p . 84 M o f f i t , 1915 ( B 6 2 2 ) , p . 115-116 MacKevett , 1970 ( B 13331, p . 29-30 MacKevetC and Cobb, 1 9 7 2 (MF-395) , l o c . 89 MacKevett and S m i t h , 1972 (GQ-943) MacKevett , 1976 (MF-773B), l o c . 49 MacKevett and Holloway, 1 9 7 7 (OF 7 7 - 1 6 9 8 1 , p . 30 , l o c . 18

Copper King (White R . ) Copper

Chisana d i s t r i c t McCarthy (16.5, 1 3 . 6 ) MF-773B, loc. 172 6 1 ° 4 6 ' N , 142°01'~

Summary: N a t i v e c o p p e r in a 6-Et.-thick zone of arnygdaloidal basalt of the T r i a s s i c N i k o l a i Greens tone i n and near amygdules. Some of copper intergrown w i t h prehnire, calcite, and zeo- lites. Exp lo red by 2 o p e n c u t s and 2 short a d i t s . [Mac- K e v e t t , 1976 (MF-773B); Moffit a n d Knopf, 1910 ( B 417); Knaebel, 1970 (GC 2 1 ) ]

References Moffit and Knopf, 1909 ( B 379) , p. 174 Moffit and Knopf, 1910 (B 4 1 7 ) , p . 55-56 Brooks , 1911 ( B 4801, p . 86-87 C a p p s , 1916 (B 630), p . 121-122 Berg and Cobb, 1967 (B 12461, p. 209 Knaebel, 1970 (GC 2 1 ) , p . 16 MacKevett and Cobb, 1 9 7 2 (MF-395), loc. 81 MacKevett, 1976 (MF-773B), l o c . 172 MacKevett and Holloway, 1977 (OF 77-169A), p . 3 5 , l o c . 108

Copper Queen Copper, Iron

Chistochina district MF-7733, loc. 131

Summary: A contact-metamorphic deposit in faulted and metamorphosed Triassic Chitistone Ls.adjacent to Jurassic granodiorite; contains magnetite, pyrrhotite, pyrite, and minor chalcopyrite. Explored by a 360-m-long adit. [~ac~evett, 1976 (MF-773B) ; MacKevett and others, 1978 (~~-1418)] Includes references to Rarus.

References Moffit, 1913 (B 5 4 2 1 , p. 83 Brooks, 1915 ( B 6 2 2 ) , 44 Moffit, 1915 (B 6 2 2 ) , p . 113 Moffit, 1918 ( B 6621, p. 160 Moffit, 1921 ( B 714), p . 193 Moffit and Merrie, 1923 (B 745), p . 71, 95 , 12% 139 Van Alstine and lack, 1946 ( B 947-G), p . 139 MacKevett and Cobb, 1972 (MF-395), ~ O C . 26 MacKevett, 1976 (MF-773B), loc. 131 MacKevett and Holloway, 1977 (OF 77-169A), p * 3 4 , lot. 80 MacKevett and others, 1978 (GQ-1618), loc. 31

(Crumb Gulch) Antimony, Copper, Gold

Nizina district MF-773B, l o c . 56

Summary: Veins as much a s 30 cm thick in shear zone cutting Creta- ceous hornfels near Tertiary granodiorite. Veins contain gold, stibnite, realgar, and pyrite, Explored by 2 short adits. Other mineralized shear zones in vicinity, some in granodiorite. A few veins in granodiorite contain masses of sibnite more than a meter long and as much as 12 cm wide. Chalcopyrite is a minor to trace constiruent of some veins. One geochemical sample contained 10,000 ppm W, b u r no tungsten mineral was noted; another sample contained 15 ppm Ag. [~ac~evett, 1976 (MF-773B) ; MacKevetr and Smith, 1968 ( C 6 0 4 ) ] Includes references to (~illiarns Peak.

References Moffit, 1937 (B 880-B), p. 98 Smith, 1937 (B 880-A), p . 87 MacKevett, 1965 (1-438) Berg and Cobb, 1967 (B 1246), p. 63-64 MacKevett and Smith, 1968 (C 604), p. 2-3, 6-9, 14 (samples 13-19) MacKevett and Cobb, 1972 (MF-395), loc. 66 MacKevett, 1974 (GQ-1146) MacKevett, 1976 (MF-773B), loc. 56 MacKevett and Holloway, 1977 (OF 77-169~), p. 31, l o c . 23 MacKevett and others, 1977 (C 7 3 9 ) , p. 4-5

(Dan Cr.) Copper, Gold , S i l v e r


Summary: P l a c e r s of Dan C r . and i t s t r i b u t a r y Copper C r . a ccoun ted f o r s l i g h t l y l e s s t han h a l f o f t h e N iz ina d i s t r i c t p l a c e r - g o l d p r o d u c t i o n of a b o u t 143,500 o z . ( a s of 1 9 5 9 ) ; ha s been sma l l - s c a l e r e c e n t a c t i v i t y . Rocks n o r t h of c r e e k and i n uppe r p a r t of i t s c o u r s e a r e T r i a s s i c l i m e s t o n e s and N i k o l a i Green- s t o n e ( s o u r c e of p l a c e r c o p p e r ) ; t o s o u t h and i n lower p a r t o f s t r e a m c o u r s e a r e younger Mesozoic s ed imen ta ry r o c k s c u t by s m a l l b o d i e s of T e r t i a r y g r a n o d i o r i t e a n d hypabyssa l r o c k s . Both bench and s t r e a m p l a c e r s ; much of g o l d i n s t r e a m p l a c e r s reworked from bench d e p o s i t s . N a t i v e silver, n a t i v e c o p p e r , and nugge t s c o n t a i n i n g bo th common; o n e copper nugget found i n 1939 r e p o r t e d t o have weighed abou t 3 t o n s . About 40 t o n s o f copper c o n c e n t r a t e s r e c o v e r e d as byproduc t o f g o l d mining was s o l d . [ ~ a c ~ e v e t t , 1978 (1-1032) ; MacKevett , 1976 (MF- 773B); M o f f i t , 1938 (B 8 9 4 ) ; M i l l e r , 1946 ( B 947-F)] See a l s o (Copper Cr . ) .

References Mendenhall and S c h r a d e r , 1903 (P p . 59-61 Purington, 1905 ( B 2591 , p . 44-46 P u r i n g t o n , 1905 (B 2 6 3 ) , p . 3 7 , 3 9 , 207 Brooks , 1908 (B 3 4 5 ) , p . 3 7 M o f f i r and Maddren, 1908 ( B 3 4 5 ) , p 8 168-169 Moff i t , 1909 ( B 379) , p. 156 M o f f i r and Maddren, 1909 ( B 3 7 4 ) , p . 45, 91-92, 97-99 M o f f i r , 1910 ( B 4 4 2 ) , p . 158 , 162-163 M o f f i t and Capps, 1911 ( B 4481, p . 76 , 8 0 , 98-103 M o f f i t , 1912 ( B 520) , p . 107 M o f f i t , 1913 ( B 5 4 2 ) , p . 80 Brooks, 1914 ( B 5 9 2 ) , p . 61 M o f f i t , 1915 ( B 6 2 2 ) , p . 105 , 115-116 S m i t h , 1917 (BMB 1 5 3 ) , p . 33 Brooks , 1921 ( B 7 1 4 ) , p . 196 Brooks , 1922 ( B 7 2 2 ) , p . 39 Brooks and Capps, 1924 ( B 7 5 5 ) , p . 27 M o f f i t , 1924 ( B 7 5 5 ) , p . 69-71 S m i t h , 1926 ( B 783) , p . 1 2 H o f f i t , 1927 (B 7 9 2 ) , p. 15 , 29 S m i t h , 1929 (B 797) , p . 16-17 Smi th , 1930 (B 8101, p . 21 Smith, 1930 (B 813) , p . 24 S m i t h , 1932 ( B 826) , p . 28 S m i t h , 1933 (B 8361, p . 27

(Dan C r . ) -- c o n t .

Smith, 1933 ( B 844-A) , p . 28 Smith, 1934 ( B 857-A), p. 26 Smith, 1934 (B 864-A), p. 30 Smith, 1936 (B 86841, p . 31 Moffit, 1937 (B 880-B), p. 98 S m i t h , 1937 ( B 880-A), p . 34 Moffit,, 1938 ( B 894), p a 125-126, 128-131 S m i t h , 1938 (B 897-A), p. 40 Smith, 1939 ( B 910-A), p . 38-39 Smith, 1939 (B 917-A), p - 37 Smith, 1941 (B 926-A), p . 3 4 Smith, 19L2 (B 933-A), p . 33 Miller, 1946 ( B 947-F), p . 98, 119-120 Moxham and Nelson, 1952 ( C 1 8 4 ) , p . 3 MacKeve tt , 1965 ( 1-438) Berg a n d Cobb, 1967 ( B 1246), p . 53 Koschmann and Bergendahl, 1968 ( P 610), p * 14 MacKevett and Smith, 1968 (C 6041, p. 3 MacKevert, 1970 (B 1333), p . 29-30 MacKevett and Cobb, 1972 (MF-395), loc. 88 Cobb, 1973 (B 1374), p . 30 Henning and Dobey, 1973 (AOF 2 5 ) , p . 7 MacKevett, 1974 (GQ-1146) MacKevett, 1976 (MF-773B), Loc, 57 MacKevett and Holloway, 1977 (OF 77-169A), p . 31, lot. 24 MacKevett and others, 1977 ( C 7 3 9 ) , p. 4-5 Singer and MacKevett, 1977 (M~-773C)

Donohoe Copper

Nizina d i s t r i c t McCarthy (10 .35 , 8 . 7 ) ( 7 ) 6 1 0 2 9 ' N , 142046'W

Summary: D i s s e m i n a t e d s u l f i d e s i n g r e e n s t o n e e a s t o f McCarthy C r . o off it a n d Capps , 1 9 1 1 (B 4 4 8 ) ] See a l s o Green B u t t e .

Reference Moffit and Capps, 1911 (B 4 4 8 ) , p , 9 7

(Donoho Peak) Copper

N i z i n a d i s t r i c t MF-773B, l a c . 115

Summary: Short adit n e a r conract between Triassic Nikolai Green- stone and Chitistone Ls. Sparsely distributed secondary copper m i n e r a l s and chalcocite along Eault. Apparent post-1950 activity. [ ~ a c ~ e v e t t , 1976 (MF-773~11

References MacKevett, 1972 (GQ-979) MacKevett and C o b b , 1972 (MF-395j, l o c . 38 MacKevett, 1976 (MF-773B), l o c . 115 MacKevett and Holloway, 1977 (OF 77-L69A), p. 3 3 , loc. 69

Erickson (& adde en) Copper, S i l v e r


Summary: Native copper, tenorite, cuprite, and minor amounts of other minerals form irregular masses in rubbly upper parts of flows and, to Lesser extents, occur in amygdules and quartz-epidote veins. Country rock Triassic Nikolai Green- stone. Minor production in 1917. About 100 m of underground workings. Samples contained as much as 70 ppm Ag. [~ac~evett, 1976 (MF-773B); MacKevett and Smith, 1968 (C 60411 Includes references to Chiti.

References M o f f i t and Maddren, 1908-(B 3 4 5 1 , P - 167-168- Moffit and Maddren, 1909 (B 3741, p. 90-91 Miller, 1946 (B 947-F), p. 98, 117-118 Berg and Cobb, 1967 ( B 1 2 4 6 ) , p . 53, 60 MacKevett and Smith, 1968 (C 6 0 4 ) , p. 2, 6, 12-13, 16 MacKevett, 1970 ( B 1333), p . 29 MacKevett and Cobb, 1972 (MF-395), l o c . 59 MacKevett and Smith, 1972 (GQ-943) MacKevett, 1976 (MF-773B), loc. 62 MacKevett and Holloway, 1977 (OF 77-169A), p. 31, lot

(samples 141-146)

2 8

(Fall Cr.) Copper

Chistochina district MF-773B, l o c s . 181, 182

Summary: Prospects on several old claims on Triassic Nikolai Green- stone; explored by short adits and open c u t s . Mainly amygdaloidal deposits that contain native copper, chalcocite, c u p r i t e , and tenorire; minor chalcocite, bornite, and secondary copper minerals in thin veins. [~ac~evett, 1976 ( ~ ~ - 7 7 3 ~ ) ]

References Mendenhall and Schrader, 1903 (P 15), p . 21 Mendenhall, 1905 ( P 4 1 ) ) p. 97 Moffit and Haddren, 1908 ( B 3 4 5 ) , p. 142-143 Moffit and Maddren, 1909 ( B 3 7 4 ) , p . 60-61 Moffit, 1910 ( B 4 4 2 ) , p . 161 Moffit, 1915 ( B 6 2 2 1 , p . 109 Moffir and Mertie, 1923 ( B 7 4 5 ) ) p . 113-114 MacKevett and Cobb, 1972 (MF-395), 10~s. 1, 2 MacKevett, 1976 (MF-773B), locs, 181, 182 MacKevett and Holloway, 1977 (OF 77-16961, p . 36, l o c s * 116, 117

(Golconda C r . ) Go ld


McCarthy (4.5-b.75, 0.0-0.3) 6 1 ° 0 0 f - 6 1 0 0 1 f ~ , 1 4 3 ° 2 6 ' - 1 4 3 0 2 8 ' ~

Summary: Placer g o l d d i s c o v e r e d i n 1901; p r o b a b l y 2,000 t o 3 ,000 oz. mined from s h a l l o w c r e e k gravels d u r i n g n e x t 10-15 y e a r s . Gold derived f r o m nea rby l o d e s , some o f which have been mined; some of g o l d r e c o n c e n t r a t e d from bench g r a v e l s . Area u n d e r l a i n by metasedi rnentary rocks- o f Mesozoic Valdez Gp. c u t be l i g h t - c o l o r e d p o r p h y r i t i c d i k e s and q u a r t z v e i n s . [ ~ a c ~ e v e t t , 1976 (MF-773~) ; M o f f i t , 1914 ( B 5 7 6 ) ]

R e f e r e n c e s Mendenhall and S c h r a d e r , 1903 ( P 1 5 ) , p . 6 2 Mendenhal l , 1905 ( P 411, p . 120 M o f f i t , 1912 ( B 5201, p . 94-98 M o f f i t , 1914 (B 5 7 6 ) , p . h3-47 Smith, 1933 (B %&-A), p . 28 Smi th , 1934 ( B 857-A), p . 26 S m i t h , 1934 (B 8 6 4 - A ) , p . 30 Smi th , 1936 ( B 868-A), p . 31 M o f f i t , 1937 ( B 880-B), p . 99 Smith, 1937 ( B 880-A), p . 34-35 M o f f i t , 1938 ( B 8941, p . 126, 128 MacKeveCt and Cobb, 1972 (MF-3951, l o c . 87 Cobb, 1973 (B 1 3 7 4 ) , p , 30-32 Henning and Dobey, 1973 (AOF 2 5 ) , p . 1 0 , 12 MacKevett , 1976 (MF-773B), lot* 8 MacKevett and Holloway, 1977 (OF 7 7 - 1 6 9 ~ ) , p . 30, l o c . 5 MacKevett and o t h e r s , 1977 (C 7391, p . 4-5

Golden Eagle Copper

Nizina d i s t r i c t McCarthy ( 1 2 . 6 , 6 . 8 5 ) a p p r o x . 6 1 0 2 3 ' N , 1 4 2 O 3 0 ' W a p p r o x .

Summary: Group o f c o p p e r c l a i m s h e l d by Alaska United Copper Explora- t i o n Co. near Bou lde r Cr. E x p l o r e d by s h o r t t u n n e l i n Niko- l a i Greenstone. [ ~ i l l e r , 1946 ( B 947-F)]

References Moffit, 1918 (B 6 6 2 ) , p . 176 Miller, 1946 ( B 947-F) , p . 120 Berg and Cobb, 1967 ( B 1 2 4 6 ) ~ p . 62

Good Enough Copper

C h i s t o c h i n a d i s t r i c t HF-773B, l o c . 180

Summary: P r o s p e c t e x p l o r e d b y 2 adits in Triassic Nikolai Green- stone. C h a l c o c i t e , m a l a c h i t e , and azurite i n v e i n s and n a t i v e coppe r and c h a l c o p y r i t e i n amygdules. [ ~ a c ~ e v e t t , 1976 (MF-773B)I

References M o f f i t and Mert ie , 1923 ( B 7 4 5 1 , p . 112-113 MacKevett and Cobb, 1 9 7 2 ( ~ ~ - 3 9 5 ) - , l o c . 3 HacKevett, 1976 ( ~ F - 7 7 3 B ) , Lac. 180 MacKevett and Holloway, i 9 7 7 ( O F 77-169h), p . 3 6 , lot. 115

G o r i l l a Copper

Nizina d i s t r i c t NF-773B, ~ O C . 94

Summary: Old shallow workings on iron- and coppe r - s t a ined fractures in Triassic Nizina Ls. [ ~ a c ~ e v e t t , 1976 (MF-773~)]

Reference MacKevett, 1976 (MF-773B), lot, 94

Green Butte (Copper Co.) Copper, Si lver

Nizina district MF-773B, loc . 87 Summary: A Kennecott-type deposit that contains chalcocire-rich

lodes localized in the lower part of the Triassic Chiti- stone Ls.; some bornite, malachite, azurite, and covellite also present. Abour 4,600 rn of underground workings. Re- ported ro have produced about 1,500 tons of high-grade ore that contained about 1,200 lbs. copper and 10 oz. silver per ton. Some recent exploration. [ ~ a c ~ e v e t ~ , 1976 (MF- 773B); Miller, 1946 ( B 9 4 7 - F ) ] Includes reference to Green. See also Donohoe.

References Martin, 1920 (B 712), p . 31 Brooks, 1923 ( B 7 3 9 ) , p . 23 Brooks and Capps, 1924 (B 7 5 5 ) , p . 27 Brooks, 1925 ( B 773), p. 28, 37 Smith, 1926 ( B 783), p . 20 Moffic, 1927 (B 7 9 2 ) , p. 27-28 Smith, 1929 (B 7971, p . 35-36 Smith, 1930 (B 8101, p . 47 Smith, 1930 (B 8131, p. 54 Smith, 1932 (B 8 2 4 ) , p . 60 Smith, 1933 ( B 836), p. 63 Moffit, 1938 ( B 8941, p. 121 Miller, 1946 ( B 947-F), p. 98, 103-104 MacKevett, 1965 (1-438) Berg and Cobb, 1967 ( B 12461, p . 53, 56-57 MacKevett and Cobb, 1972 (MF-395), loc. 47 MacKevett, 1974 (GQ-1146) MacKevett, 1976 (MF-773B), loc. 87 MacKevett and Holloway, L977 (OF 7 7 - 1 6 9 ~ ) , p . 32, loc. 47 MacKevett and others, 1977 ( C 7391, p. 4

H a r r a i s Copper, Lead, S i l v e r , Z inc

Nizina d i s t r i c t MF-773B, l o c . 2

Summary: S m a l l , s p o r a d i c a l l y d i s t r i b u t e d pods a n d d i s s e m i n a t i o n s t h a t c o n t a i n c o p p e r , l e a d , and z i n c s u l f i d e s and t h e i r a l t e r a t i o n p r o d u c t s and silver o r a silver s u l f i d e . L o c a l i z e d i n s h e a r zones , m a i n l y i n Permian marble. [ ~ a c ~ e v e t t , 1976 (MF-773B) ; S e i r z , 1963 ( B 1155) ]

R e f e r e n c e s S e i t z , I963 ( B 1155), p . 66-72 Berg and Cobb, 1967 ( B 1 2 4 6 1 , p. 6 2 MacKevetr and Cobb , 1972 (MF-3951, Loc. 78 MacKevett, 1976 (MF-773B), l o c . 2 MacKevett and Holloway, 1977 (OF 7 7 - 1 6 9 A ) , p . 3 0 , l o c . 1

(Hawkins Glacier) Molybdenum

Nizina district McCarthy (17.1-17.7, 2.65-3.9) MF-773B, l o c s . 30, 32 61'08'-61'12 I N , 141'55 1 - 1 4 1 0 5 8 ' ~

Summary: Boulders of T e r t i a r y granodiorite in moraines of Hawkins G l a c i e r contain quartz-molybdenite v e i n s a n d / o r molybdenite-bearing thin aplite d i k e s .

R e f e r e n c e MacKevett, 1976 (~F-773B), 1 0 ~ s . 30, 3 2

(Hidden C r . ) Copper

Nizina district McCarthy (6.85-7.2, 9.55-10.0) MF-773B, locs. 100, 116-118 61'32'-61°34'N, 143°~8'-143011'W

Summary: Triassic Nikolai Greenstone contains bornite, chalcopyrite, chalcocite, and secondary copper minerals, mainly along faults; deposits at or near contact with overlying Chiti- srone Ls. Claims staked in 1906; appear- to have been some post-1950 activity. Prospects consist o f short adits and surf ace excavations. [~ac~evett , 1976 (MF-773B) ; Miller, 1946 (B 9 4 7 - ~ ) ] Includes references t o N e b r a s k a . See also Woodin & Herman.

References Moffit and Maddren, 1908 ( B 3 4 5 ) , p . 158-160 Moffir and Maddren, 1909 (B 3 7 4 ) , p . 77-79 Moffit, 1910 ( B 4 4 2 ) , p . 161 Moffit, 1915 (B 6 2 2 ) , p . 115 Moffit, 1918 ( B 6 6 2 ) , p . 162-163 Miller, 1946 (B 947-F), p. 98, 118-119 Berg and Cobb, 1967 ( B 12461, p . 61-62 MacKevett, 1972 (GQ-979) MacKevett and Cobb, 1972 (MF-395), l o c s . 35, 36 MacKevett, 1976 (MF-773B), locs. 100, 116-118 MacKevetr and Holloway, 1977 (OF 77-16981, p . 33, lacs. 55, 70, 71

Houghton Alaska Exploration Co. Copper (Chitistone R . )

Nizina district MF-773B, lot. 81

McCarthy (13.8, 8.75) 61°29'N, 1420211W

Summary: Several closely spaced old prospects along minor faults near upper contact (with Chitistone L s . ) of Triassic Nikolai Greenstone. Secondary copper minerals coat fractures along faults. Explored by a few short adits. [~ac~evert, 1976 ( ~ ~ - 7 7 3 ~ ) ] See also Peavine.

References M o f f i t and Maddren, 1908 ( B 345), p. 166-167 Moffit and Maddren, 1909 (B 374), p. 89-90 Miller, 1946 ( B 947-F), p . 120 MacKevett and Cobb, 1972 (MF-3951, loc. 54 [~rror; misidentified as

Contact GU lch] MacKevett and Smith, 1972 (GQ-943) MacKevett, 1976 (MF-773B), l o c . 81 MacKevett and Holloway, 1977 (OF 77-169A), p. 32, l o c . &4

Houghton A l a s k a Exploration Co. Copper (McCarrhy C r . )

Nizina district MF-395, loc. 45

Summary: Some underground exploration on copper claims on Chiti- stone Ls. where cut by Bonanza fault and cross faults. o off it, 1909 ( B 3 7 9 ) ] In some references data cannot be separred from those for Mother Lode. See also Kenne- c o t t .

References Moffit, 1909 (B 3 7 9 ) , p. 155 Moffir, 1910 ( B 4 4 2 ) , p. 160-161 Moffit and Capps, 1911 ( B 4 4 8 ) , p . 92 MacKevert and Cobb, 1972 (MF-395), l o c . 45

Kennecott (Copper Corp.) Copper, Lead, Silver, Zinc

Nizina district MF-773B, 10~s. 89-93

McCarthy (9.2-9.95, 9 . 1 - 9 . 4 ) 61°31'-61032f~, 142°49'T142054'~

Summary: Bonanza, Jumbo, Erie, and Mother Lode eventually intercon- nected by underground workings and operaced as a unit. Between 1913 and 1938 produced about 1.2 billion lbs. of copper and 9 million oz. of silver. Intermittent small- scale surface mining since 1938 with minor production, Deposits localized in lower, largely dolomitic, parts of Triassic Chitistone Ls. generally less than 100 m above the underlying Nikolai Greenstone. Major deposits are mainly irregular massive veinlike bodies; largest known ore body (Jumbo) averaged about 110 m in height and was 0.6-18.5 rn wide, and extended along plunge 460 m. Principal ore mineral was chalcocite; other sulfides were covellite, enargite, bornite, chalcopyrite, luzonite, tennantite, pyrite, sphalerite, and galena. Oxidized ore, not related to present land surface, constituted a minor part of production. Origin and geologic history of deposits complex and not thoroughly understood. Copper probably originally came from Nikolai Greenstone and was deposited by oxygenated ground- water in dolomitic sabhka deposits in the Chicistone Ls. from Late Triassic to Late Jurassic; deposits were then de- formed and remobilized during Late Jurassic and Early Creta- ceous regional orogeny. Independenceprospecr (not connected to main mines, but close to them) was on chalcocite- and bornite-bearing veins in shear zones mainly in Nikolai Green- stone. [~ac~evett, 1976 (MF-773B); Berg and Cobb, 1967 (B 124611 Includes references to: Bonanza, Erie, Independence, Jumbo, Kennecott-Bonanza, Kennicott Mines Go., Marvelous, Mother Lode (Coalition Mines Co.), Old Hero, Old Independence. See also Nelson (Glacier Cr.).

References Schrader and Spencer, 1901, p. 86 Mendenhall and Schrader, 1903 ( P 151 , p . 16-18, 27-28 Mendenhall and Schrader, 1903 ( B 213), p. 144-145 Mendenhall, 1905 (B 41), p - 9 2 , 103-104 Brooks, 1907 ( B 314), p . 28 Moffit and Maddren, 1908 ( B 3 4 5 ) , p. 161-165 Moffit, 1909 (B 3 7 9 ) , p . 153-154 Moffit and Maddren, 1909 (B 374), p. 80-88 Brooks, 1910 (B 4421, p a 34 Moffit, 1910 (B 442), p . 160 Brooks, 1911 ( B 480), p . 27-28 Brooks, 1911 (B 4 8 0 ) , p. 84-86 Moffit and Capps, 1911 ( 8 448), p . 7 6 , 83-93

Kennecot t (Copper Corp . ) -- c o n t .

M o f f i t , 1912 (B 5 2 0 ) , p . 105-106 M o f f i t , 1913 ( B 5 4 2 ) , p - 8 2 , 8 4 Brooks, 1914 (B 5921, p . 60-61 Brooks, 1915 ( B 6 2 2 ) , p , 44 M o f f i t , 1915 ( B 6 2 2 ) , p . 104-105, 114-115 Brooks, 1916 (B 642) , p. 54 Smith , 1917 (BMB 1 4 2 ) , p . 37-38, 52 Smi th , 1917 (BMB 1 5 3 ) ) p . 30-32 Brooks , 1918 ( B 6 6 2 ) ) p. 1 6 , 43 M o f f i t , 1918 ( B 6 6 2 ) , p . 163-175 M a r t i n , 1919 ( B 6 9 2 ) , p . 17-18, 30 Bateman and ~ c L a u g h l i n , 1920 Mart in , 1920 (B 7 1 2 ) , p . 30-31 Brooks , 1921 ( B 7 1 4 ) , p . 12-13, 25 , 27-28 Brooks and M a r t i n , 1921 (B 7 1 4 ) , p . 69 M o f f i r , 1921 ( B 714) , p . 194-195 Brooks , 1922 (B 722) , p . 19, 21, 38-39 Brooks, 1923 (B 739) , p . 1 3 , 23 Brooks and Capps, 1924 ( B 7 5 5 ) , p . 15 , 26-27 M o f f i t , 1924 ( B 755) , p . 62-65, 68 , 70-72 Brooks , 1925 (B 773) , p . 28, 37 Smi th , 1926 (B 7 8 3 ) , p . 20 M o f f i t , 1927 (B 792) , p . 27-28 Smith , 1929 ( B 7 9 7 ) , p . 3 2 , 34-35 Smith , 1930 (B 8101, p . 45-46, 48 Smi th , 1930 ( B 8 1 3 ) , p . 52-53 Smi th , 1932 (B 8 2 4 ) , p . 58-59 Smi th , 1933 ( B 8 3 6 ) , p . 60-61 Smith , 1933 ( B 844-A), p . 59-60 Smith , 1934 (B 857-A), p . 56-57 Smith , 1934 ( B 864-A), p . 59 Smith , 1936 ( B 868-A), p . 67 M o f f i t , 1937 (B 880-B), p. 98 Smith , 1937 (B 880-A), p . 69-70 Gardner and o t h e r s , 1938 (BMB 4 0 5 ) , p. 25, 205-206, 209-211, 275 M o f f i t , 1938 (B 8 9 4 ) , p . 118-122, 125 , 129 , 131 Smith , 1938 ( B 897-A), p . 78-80 Smi th , 1939 (B 910-A), p . 84-85 Smith , 1939 ( B 917-A), p. 85-87 B a i n , 1946 ( I C 7379) , p. 32-33 M i l l e r , 1946 (B 947-F), p . 98-101 Wedow and o t h e r s , 1952 (OF 5 1 1 , p . 107 Twenhofel , 1953 ( C 252) , p . 5 U.S. G e o l o g i c a l Survey, 1965 ( P 525-A), p. A8, A104 MacKevett and Radtke , 1966 (P 550-B), p . B165-~166, ~ 1 6 8 Berg and Cobb, 1967 ( B 1 2 4 6 ) , p . 52-53, 56 MacKevett and Smi th , 1968 (C 6041, p . 2

Kennecott ( C o p p e r Corp.) -- c o n t . Armstrong a n d others, 1969 (P 650-D), p . ~ 6 1 - ~ 6 2 Thorne, 1969 (uSBM OF 22-69), p. 35 MacKevett, 1971 (B 1323), p. 32-34 MacKevett, 1972 (GQ-979) MacKevett and Cobb, 1972 (MF-3951, locs. 40-44 Cox and others, 1973 ( P 820), p * 180 Henning a n d Dobey, 1973 ( A O F 2 5 ) , p . 7 Hey1 and ochers, 1973 (P 8201, p . 588 MacKevett, 1976 ( M F - ~ T ~ B ) , LOGS. 89-93 ' Silberman and others, 1976 ( C 733), p . 51-52 Armstrong a n d MacKevect, 1977 ( C 751-B), p. B56 Armstrong and MacKevetr, 1977 (OF 77-217) MacKevett and Holloway, 1977 (OF 77-169A), p . 32, locs. 49-51 MacKevett and others, 1977 ( C 739), p . 4-5 Silberman and others, 1977 ( C 751-B), p . B56-B58 Singer and MacKevett, 1977 (MF-773C) U.S. Geological Survey, 1977 (P 105O), p . 83, 201-202 MacKevert and others, 1978 (OF 78-1-E), p. 21

Kinney-Go l d e n Copper

Chistochina district MF-773B, loc. 104

McCarthy (3.1, 9.0) 61'31 'N, 1 4 3 ° 3 8 t ~

Summary: Chalcopyrite and secondary copper minerals l o c a l i z e d a l o n g subsidiary f a u l t s t h a t c u t Triassic N i k o l a i Greens tone and the lower member of theTriassic-Jurassic McCarthy Fm. near a major thrust fault. Explored by an adit and trenches. Apparent post-1950 activity. [ ~ a c ~ e v e t t , 1976 (MF-773~)]

References N o f f i t , 1918 ( B 6 6 2 ) , p . 160-161 Berg and Cobb, 1967 ( B 1 2 4 6 ) ) p . 46 MacKevetr and Cobb, 1972 (MF-3951, l o t . 28 MacKevett, 1976 (~F-773B), lot. 104 MacKevett and Holloway, 1977 (OF 77-169A) , p. 3 3 , lot. 58

(Kletsan Cr.) Copper

Chisana district MF-773B, ~ O C 110

McCarthy (25.05, 10.85) 61°35'N, 141°00'W

Summary: Fairly abundant copper nuggees in creek gravels; parts of Kletsan Cr., mainly in Canada, have been staked for placer copper. [~ac~evett, 1976 (MF-773~)]

References Brooks, 1900 (20th Annual Report), p . 488-489 Brooks, 1900 (21st Annual R e p o r t ) , p. 379-381 Mendenhall and Schrader, 1903 ( P 151, p. 40-42 Mendenhall and Schrader, 1903 (B 2131, p. 148 Brooks, 1907 (B 3141, p. 28 off it and Knopf, 1909 (B 379), p . 175-176 Moffit and Knopf, 1910 (B 417), p. 57 Capps, 1915 ( B 6221 , p . 226 Capps, 1916 ( B 630), p . 90, 120-, 124-125 Knaebel, 1970 (GC 2 1 1 , p. 13 MacKevett and Cobb, 1972 ( ~ ~ - 3 9 5 ) , loc. 96 MacKevett, 1976 (MF-773B), l o c . 110 MacKevett and Holloway, 1977 (OF 77-169~), p . 33, loc. 63

(Kotsina R.) Copper

Chistochina district MF-773B, 10~s. 170, 171

McCarthy (0.65-1.0, 1 2 . 6 - 1 2 . 7 ) 61°43;N, 143*52'-143°55'~

Summary: Several short exploratory adits on pyrite- and chalcopyrite-bearing veins, less than 30 cm thick, in Triassic gabbro and Tertiary Eelsic dikes. Semiquantitative spec- trographic analyses of selected samples showed as much as 3 ppm Ag, 1,000 ppm Cu, 20 ppm Mo at MF-773B, l o c . 170. Amygdaloidal Triassic Nikolai Greenstone contains sparsely distributed native copper and chalcocite at MF-773B, loc. 171. [~ac~evett, 1976 (MF-773B); MacKevett and others, 1978 (GQ-1418)] .

References Moffit and Maddren, 1908 ( B 3 4 5 ) , p . 137 Moffit, 1909 ( B 3 7 9 ) , p . 156 Moffit and Maddren, 1909 (B 3741, p . 54-55 Moffit, 1910 ( B & 4 2 ) , p . 161 M o f f i t , 1915 ( B 6 2 2 ) , p . 109 MofEit and Mertie, 1923 (B 7451, p. 100-101 MacKevert and Cobb, 1972 (MF-395), loc. 7 MacKevett, 1976 (MF-773~), locs. 170, 171 MacKevett and Holloway, 1977 (OF 77-16981, p. 35, locs. 106, 107 MacKevett and others, 2978 (GQ-1418), locs. 5, 6

(Lak ina R . ) Copper

C h i s t o c h i n a d i s t r i c t MF-773B, l o c , 101

McCarthy ( 5 . 1 , 9 . 8 ) 61°33 ' N , 143O24'W

Summary: Main p r o s p e c t e x p l o r e d by a d i t on 2 shear zones , each l e s s than 1 m t h i c k , i n T r i a s s i c N i k o l a i G r e e n s t o n e . The s h e a r zones c o n t a i n c h a l c o c i t e , b o r n i t e , c o v e l l i t e , m a l a c h i t e , and a z u r i t e . Nearby s u r f i c i a l workings a l o n g a b r e c c i a t e d f l ow t o p of N i k o l a i Greens tone that c o n t a i n s s p o r a d i c a l l y d i s t r i b u t e d n a t i v e c o p p e r . P robab ly h a s been post-1950 a c t i v i t y . [ ~ a c ~ e v e t t , 1976 ( ~ ~ - 7 7 3 ~ ) ] I n c l u d e s r e f e r e n c e s to Lakina (Copper G o . ) .

R e f e r e n c e s Moffir and Maddren, 1908 (B 3 4 5 ) , p . 155-158 M o f f i t and Maddren, 1909 ( B 3741, p. 75-77 M o f f i t , 1910 (B 4 4 2 ) , p . 161 M o f f i t , 1915 ( B 6 2 2 ) , p . 115 Brooks , 1916 (B 6 4 2 ) , p , 54 M o f f i t , 1918 ( B 6 6 2 ) , p . 161-162 Berg and Cobb, 1967 (B 1 2 4 6 ) , p . 46 MacKevett and Cobb, 1972 (MF-395), l o c . 29 MacKevett , 1976 (MF-773B), l a c . 101 MacKevett and Holloway, 1977 (OF 7 7 - 1 6 9 ~ ) , p . 3 3 , l o c

L a r s o n C o p p e r

C h i s t o c h i n a d i s t r i c t MF-7738, l o c . 168

Summary: Malachite-s tained fracture coatings in a f a u l t zone r h a t cuts T r i a s s i c N i k o l a i Greens tone . Exp lo red by 2 adits. [ ~ a c ~ e v e tt, 1976 (MF-773B)]

References M o f f i t and Mertie, 1923 ( B 7 4 5 ) , p . 100 Berg a n d Cobb, 1967 (B 1246), p . 44 MacKevett and Cobb, 1972 (MF-395), loc, 10 MacKevett, 1976 ( ~ ~ - 7 7 3 B ) , l o c . 168 MacKevett and Holloway, 1977 (OF 77-1698), p . 35, lot. 104 MacKevett and others, 1978 (GQ-1418), loc. 9

L e Tendre Gold

N i z i n a d i s t r i c t MF-773B, Lac. 11

Summary: P r o s p e c t l a r g e l y cove red by s u r f i c i a l d e b r i s ; r e p o r t e d t o have e x p l o r e d a b r e c c i a t e d f a u l t zone . Was t h e s o u r c e of r i c h spec imens of go ld -bea r ing q u a r t z . Count ry rock Meso- z o i c Valdez Gp. [ ~ a c ~ e v e t t , 1976 (MF-773B); M o f f i t , 1937 ( B 880-B)] I n c l u d e s r e f e r e n c e t o La Tendre .

R e f e r e n c e s M o f f i t , 1937 ( B 880-B), p . 102 MacKevett and Cobb, 1 9 7 2 (MF-3951, l a c . 33 MacKevett , 1976 (MF-773B), loc. 11 MacKevett and Holloway, 1977 (OF 77-169A), p . 30, l o c . 6

(Lime Cr., rrib. Rock Cr.) Copper

Chistochina dis tic t MF-773B, loc. 167

Summary: Bornite and minor chalcopyrite in thin veins and local disseminations in Triassic Nikolai Greenstone near contact with Chitistone Ls. Explored by 2 short adits. [~ac- Ksvett, 1976 (MF-773B); Moffit and Mertie, 1923 (B 745)] ~ncludes references to: G & B, United Verde.

References Mendenhall and Schrader, 1903 ( P 1 5 ) , p. 21 Mendenhall, 1905 ( P b l ) , p . 96-97 Moffit and Maddren, 1908 (B 345), p. 138 Moffit and Maddren, 1909 (B 374), p . 55-56 Moffit, 1915 (B 6 2 2 ) , p . 111 Moffit and Mertie, 1923 (B 7451, p. 92, 105 Berg and Cobb, 1967 (B 1 2 4 6 ) , p . 44 MacKevett and Cobb, 1972 (MF-3951, l o c . 9 MacKevett, 1976 (MF-773B), lot. 167 MacKevett and Holloway, 1977 (OF 77-169A), p . 35, LOC. 103 MacKevetc and others, 1978 (GQ-14181, l o c . 13

(Lime Cr., t r i b . White R . ) Gold

Chisana d i s t r i c t McCarthy (18.0, 13.6) app rox . 6 1 ° 4 5 ' ~ , 141°50'w a p p r o x .

Summary: Was scene of one or t w o small stampedes, b u t o n l y small amounts of p l a c e r gold were f o u n d . [capps, 1916 ( B 6 3 0 ) ]

References Capps, 1915 ( B 6 2 2 ) , p . 223

London & Cape (Co.) Copper

Chistochina district MF-773B, l o c . 129

McCarthy (2.4, 9.8) 6 1 ° 3 4 ' ~ , 143'43'~

Summary: A prophyry copper deposit that contains pyrite-chalcopyrite veinlets and disseminations in locally altered Jurassic granodiorite and quartz diorite. Site of an old adit and some recent exploration interest. Semiquantitative spec- trographic analyses of grab samples indicated as much as 1.5 ppm Ag, 10,000 ppm Cu, 70 ppm Mo; most samples contained about 1,000 pprn Cu. [~ac~evett and Holloway, 1977 (OF 77- 169A) ]

References.. Moffit, 1918 (B 6 6 2 ) , p . 159-160 Moffit and Mertie, 1423 (B 7 4 5 1 , p . 136-137 MacKevett and Cobb, 1972 (MF-395), loc. 24 MacKevett, 1976 (MF-773B), loc. 129 MacKevett and Holloway, 1977 (OF 77-169A), p. 3 4 , loc. 78 MacKevett and others, 1978 (GQ-1418), loc. 33

Lost Cabin (Extension) Copper

Chistochina district MF-773B, ~ O C . 177

McCarthy (0.2, 12.85) 6 1 ° 4 4 ' ~ , 1 4 3 ~ 5 9 ' ~

Summary: Sparsely distributed chalcocite, bornite, and chalcopyrite in thin veins and Local disseminations in Triassic Nikolai Greenstone. Explored by 4 adits and several open cuts. [ ~ a c ~ e v e t t and Holloway, 1977 (OF 77-169~) ; MacKevett , 1976 ( ~ ~ - 7 7 3 ~ ) ]

References Moffit and Mertie, 1923 (B 745), pa 112 Berg and Cobb, 1967 (B 1 2 4 6 1 , p . 44 MacKevett and Cobb, 1972 ( ~ F - 3 9 5 ) , lot. 6 MacKevett, 1976 (MF-773B), l o c . 177 MacKevett and Holloway, 1977 (OF 77-1698), p . 3 5 , loc. 1 1 2 MacKevert and others, 1978 (GQ-1418), loc. 1

Mayflower Copper

Chistochina district PlF-773B, l o c . 1 2 7

Summary: Bornite, chalcocite, and seconda ry copper minerals in narrow veins along f a u l t s in Triassic Nikolai Greenstone. Explored by a short a d i t . [ ~ a c ~ e v e t t , 1976 (MF-773~)]

References Moffit, 1918 (B 6 6 2 ) , p . 159 Moffit and Mertie, 1923 ( B 7 4 5 ) , p l 135-136 NacKevett and Cobb, 1972 ( ~ ~ - 3 9 5 ) , l o c . 22 MacKevert, 1976 (ME-773B), Loc. 1 2 7 MacKevett and Holloway, 1977 (OF 77-169A), p. 34, l o c . 7 6

( t i ine ra1 C r . ) Copper , Gold, S i l v e r

C h i s t o c h i n a d i s t r i c t NF-773B, L O C . 179

Summary: S e v e r a l o l d workings i n v i c i n i t y ; ma in ly on q u a r t z v e i n s , a s much a s 50 cm t h i c k , t h a t c u t Permian a r g i l l i t e and g r a n o d i o r i t e . The v e i n s c o n t a i n p y r i t e , c h a l c o p y r i t e , and minor c h a l c o c i t e . A s much a s a b o u t 3 o z . p e r t o n each o f s i l v e r and g o l d r e p o r t e d i n o l d a s s a y s . [ M a c ~ e v e t t , 1976 (NF-773B) ; M o f f i t and M e r t i e , 1923 (B 7 4 5 ) ] I n c l u d e s r e f e r - e n c e s t o Valdez c l a i m on Mineral C r .

R e f e r e n c e s M o f f i t , 1915 ( B 6 2 2 ) , P . 109-110 M o f f i t and M e r t i e , 1923 (B 7 4 5 ) , p . 114-115 Berg and Cobb , 1967 (B 12461, p . 43-44 MacKevett and Cobb, 1972 (MF-395), Loc. 4 MacKevett , 1976 ( ~ ~ - 7 7 3 B ) , lot. 179 MacKevett and Holloway, 1977 ( O F 77-1696), p . 3 6 , l o c . 114

(Monahan CT.) G o l d ( ? )

N i z i n a d i s t r i c t McCarthy ( 5 . 6 5 , 0 . 2 5 ) a p p r o x . 6l0O4'N, 1430201W a p p r o x .

Summary: Has been c o n s i d e r a b l e p r o s p e c t i n g f o r p l a c e r g o l d i n a rea o f Monahan and Golconda C r e e k s . No d e f i n i t e statement that any g o l d was f o u n d on Monahan Cr, S e e a l s o (Golconda Cr.).

References Moffit, 1914 (B 5761 , p . 44 S m i t h , 1 9 3 3 ( 3 844-A), p . 28 Smith, 1934 (B 857-A), pa 26 Smith, 1934 ( B 8 6 4 - A ) , p . 30 S m i t h , 1936 ( B 868-A), p . 31 Smith, 1937 ( 3 880-A), p . 34-35

(Moraine Cr.) Copper

Chisana district >IF-773B, loc. 151

McCarthy ( 1 8 , 5 5 , 11.65) 6 1 ° 3 9 ' N , 141°47'W

Summary: Flows of Triassic Nikolai Greensrone contain amygdules and veinlets of intergrown prehnite, calcite, chalcocite, and native copper. Has been a little e x p l o r a t o r y work. [ ~ a c ~ e v e t r , 1976 (MF-773B); Capps, 1916 ( B 63011

References MofEit and Knopf, 1909 ( B 379), p . 174-175 Moffit and Knopf, 1910 ( B 4 1 7 ) , p . 56 Capps, 1916 (B 630), p . 123-124 Berg and Cobb , 1967 (B 1 2 4 6 ) , p. 209 Knaebel, 1970 ( G C 2 1 ) , p . 17 MacKevett and Cobb, 1972 (MF-3951, loc. 83 MacKevett, 1976 (MF-773B), l o c . L51

Nelson (Glacier Cr.)

N i z i n a d i s t r i c t MF-773B, loc. 69

Copper, Silver

McCar thy ( 1 3 . 7 , 8 - 0 5 ) 61°27'N, 142O23'W

Summary: Kennecott-type deposit containing chalcocite, covellite, enargite, bornite, malachite, chalcopyrite, and pyrite; in near-basal parts of a faulted block of Triassic Chitistone Ls. A few hundred meters of underground workings; minor production, 1929-30. Each of 3 samples taken across veins contained 50 pprn Ag. [~ac~evert, 1976 (MF-773B) ; Miller, 1946 (B 947-F)] Includes references to Kennecott-type deposits on Glacier C r .

References Smith, 1930 (B 8131, p . 54 Ba teman, 1932 Smith, 1932 (I3 8 2 4 ) , p . 60 Smith, 1933 ( B 8 3 6 ) , p . 62 Moffit, 1938 (B 894), p . 1 2 1 Miller, 1946 (B 947-F), p . 110-114 Sainsbury, 1952 (OF 611, p. 2-13 Berg and Cobb, 1967 (B 12461, p . 59-60 MacKevett and Smith, 1968 ( C 6041, p. 6-9, 14 (samples 29-31) MacKevetr and Cobb, 1972 (MF-395), l o c . 53 MacKevett and Smith, 1972 (GQ-943) MacKevett, 1976 (MF-773B), loc. 69 HacKevett and Holloway, 1977 (OF 77-169A), p . 32, loc. 34

Nelson (near Golconda Cr.) Cold


Summary: Gold irregularly distributed in thin quartz veins that cur M e s o z o i c Valdez Gp. [ ~ a c ~ e v e e t , 1976 (MF-773~)]

References Moffit, 1937 (B 880-B), p . 102 MacKevett and Cobb, 1972 (MF-395), l o c . 34 MacKevett, 1976 (MF-773B), l o c . 10 MacKevett and Holloway, 1977 (OF 7 7 - t 6 9 A ) , p . 30, loc, 6

Niko lai Copper

Nizina districc ?IF-773B, loc. 75

McCarthy (11.1, 8.2) 6 1 ° 2 8 ' N , lbZo41'W

Summary: Two veins, each less than 1 m thick, in shear zones in Tri- assic Nikolai Greenstone contain bornite, chalcopyrite, pyrrhotite, and secondary copper and iron minerals in a quartz-calcite gangue. Deposit known to natives in late 1800's; originally sraked in 1899. More than 100 m of underground workings. No recorded production. [~ac- Kevett, 1976 ( ~ ~ - 7 7 3 ~ ) ]

References Rohn, 1900, p. 437 Schrader and Spencer, 1901, p . 82-83, 86-87 Mendenhall and S c h r a d e r , 1903 (P 15), pa 16-18, 28-29 Mendenhall and Schrader, 1903 ( B 2 1 3 ) , p * 144 Mendenhall, 1905 (P p 92, 104-105 Moffit and Maddren, 1908 ( B 345), p* 165-166 Moffit and Maddren, 1909 (B 374), p . 88-89 Brooks, 1911 ( B 480), p. 86-85 Moffit and Capps, 1911 ( B 448), p . 75, 93-95 Moffit, 1912 (B 520), p . 106 Moffit, 1913 (B 542), p a 84 Brooks, 1921 (B 7141, p. 28 Miller, 1946 (B 947-F), p. 98, 106-108 MacKevett, 1965 (1-438) Berg and Cobb, 1967 ( B 12461, p . 53, 58 MacKevert and Smith, 1968 ( C 604), p. 2 , 8-9, 14 (10~. 8 ) MacKevert and Cobb, 1972 (MF-395), loc. 49 MacKevett, 1974 (GQ-1146) MacKevett, 1976 (MF-773B), loc. 75 MacKevett and Holloway, 1977 (OF 77-169~), p. 32, loc. 40 MacKevett and others, 1977 ( C 739), p. 5

(Nikolai Butte) Copper

N i z i n a district MF-773B, Zoc, 58

McCarthy (13.0, 6.7) 61°23'N, 142O27'W

Summary: Several small prospectsexplored narrow veins in steep faults that cur the Triassic Nikolai Greenstone and Chitistone Ls. and copper-stained zones along the Nikolai-Chitistone contact. Geochemical samples contained as much as 10 ppm Ag, 15,000 ppm P b , 10,000 pprn Zn, but no lead or zinc minerals were reported. [~ac~evett, 1976 ( ~ ~ - 7 7 3 ~ ) ] Includes reference to Nikolai Butte Copper Co,

References Miller, 1946 ( B 947-F), p. 120 MacKevett and Smith, 1968 ( C 604), p . 7-11, 14 (samples 50-52) MacKevett and Cobb, 1972 (MF-395), loc. 67 MacKevett and Smith, 1972 (GQ-943) MacKevett, 1976 (MF-773B), loc. 58 MacKevett and Holloway, 1977 (OF 77-169A), p . 31, loc. 25

(Nugget Cr.) Copper, S i lver


McCarthy (2.35, 11.3) 61°39'N, 143O43'W

Summary: More than 4,000 ft. of underground workings on Valdez claim mainLy exploited a bornite-chalcopyrite-pyrite- bearing vein, locally more than 3 Er. thick, that follows a fault cutting the Triassic Nikolai Greenstone. In one level of mine chalcopyrite filled vesicles in greenstone. Produced 2 carloads of high-grade hand-sorted orebefore 1916 and 160 tons of concentrates and hand-sorted ore between 1916 and when mine was abandoned in 1919 because ore did not maintain grade with depth. Sample ok selected ore contained 200 ppm Ag and more than 2% Cu. Minor pros- pecting on nearby claims. Slablike copper nugget that weighted several tons was found in bed of Nugget Cr. near Valdez claim. offit it and Mertie, 1923 (B 7 4 5 ) ; MacKevett, 1976 (MF-773~11 Includes references to Valdez claim on Nugget Cr.

References

Schrader and Spencer, 1901, p . 85-86 Mendenhall and Schrader, 1903 ( P IS), p . 27 Mendenhall, 1905 (P 411, p . 103 Moffit and Maddren, 1908 ( B 345), p , 153-155 Moffit, 1909 ( B 379), p. 155 Moffit and Maddren, 1909 (B 374), p. 45, 72-74 Moffit, 1910 (B 442), p. 161 Moffit, 1913 (B 5421, p . 83 Brooks, 1914 ( B 592), p * 61 Brooks, 1915 (B 6221, p . 44 Moffit, 1915 ( B 6 2 2 ) , p . 113 Brooks, 1916 (B 6421, p . 54 Smith, 1917 (BMB 142), p . 37, 52 Smith, 1917 (BMB 153), p. 30 Moffit, 1918 ( B 6 6 2 ) , p. 158 Martin, 1920 ( B 712), p. 31 Brooks, 1921 ( B 714), p. 29 Moffit, 1921 (B 7141, p. 190-191 Moffit and Mertie, 1923 (B 745), p. 82-83, 85, 90, 93, 129-133 Moffit, 1938 ( B 8 9 4 ) , p. 12& Van Alstine and Black, 1946 ( B 9 4 7 4 1 , p . 136-137 Berg and Cobb, 1967 ( B 1246), p. 42-43 MacKevett and Cobb, 1972 (MF-395), loc. 20 MacKevett, I976 (M~-773B), loc. 139 MacKevett and Holloway, 1977 (OF 77-169A), p. 34, loc. 85 MacKevett and others, 1978 (GQ-1418), l o c . 18

OIHara(-Meloy) Lead, Zinc

Niz ina d i s t r i c t MF-773B, L O C . 59

Summary: Veins as much as 8 i n . c h i c k of g a l e n a , sphalerite, pyrite, marcasite, and pyrrhotite in Permian m a r b l e . A little d i s - seminated tourmaline, pyrite, pyrthotite, and sphalerite also in m a r b l e . S h o r t a d i t s driven in about 1940 did not reveal a minable ore body. [8erg and Cobb, 1967 (B 1246) ; MacKevett, 1976 (MF-773B)]

References Berg and Cobb, 1967 (.B 1246), p - 64 MacKevert and Cobb, 1972 ( ~ ~ - 3 9 5 ) , loc. 30 MacKevett, 1976 (ME-773B), l o c . 59 MacKevett and Holloway, 1977 (OF 77-1698), p. 31, loc. 26

(Peacock Cr. ) Copper

Chistochina district NF-773B, loc. 162

Summary: Several old claims on copper-bearing veins in Triassic Nikolai Greenstone cur by apophyses of nearby Jurassic granodiorite mass. Workings practically obliterated. [~ac~evett, 1976 (MF-773B); M o f f i t and Mertie, 1923 (B 74511

References >lendenhall and Schrader, 1903 ( P 15), p . 19-20 Moffit and Maddren, 1908 (B 3451, p . 140-141 Moffit and >laddren, 1909 ( B 3 7 4 ) , p. 57-58 Moffit and Mertie, 1923 (B 7451, p . 107 Berg and Cobb, 1967 ( B 1246), p . 44 MacKevett and Cobb, 1972 (MF-395), loc. 13 MacKevett, 1976 (MF-773B), loc. 162 MacKevett and Holloway, 1977 (OF 77-16981, p . 35, loc. 98 MacKevett and others, 1978 (GQ-1418), loc. 12

Peavine Copper


Summary: Widespread malachite and azurite coatings in brecciated fault zone; contains some chalcocite; cuts Chitistone Ls. and Nikolai Greenstone (both Triassic). Explored by short adit and surface workings; small shipment made during winter of 1973-74. [~ac~evett, 1976 ( ~ ~ - 7 7 3 ~ ) ] See also Houghton Alaska E x p l o r a t i o n Co. (Chitistone R . ) .

References Moffit and Maddren, 1908 (B 345), p . 166-167 Moffit and Maddren, 1909 (B 3741, p . 89-90 Miller, 1946 (B 947-F), p. 120 Berg a n d Cobb, 1967 ( B 1 2 4 6 ) , p. 60 MacKevett and Smith, 1968 ( C 6 0 4 ) , p. 8-9, 14 (loc. 25) MacKevett and Cobb, 1972 (MF-395), l o c . 51 MacKevett and Smith, 1972 (GQ-943) MacKevett, 1976 (MF-773B), loc, 73 MacKevett and Holloway, 1977 (OF 77-179A), p. 32, loc. 38 MacKevetr and others, 1977 ( C 7391, p. 4

Pierson Copper, Gold

Chistochina fistrict MF-773B, loc. 126

McCarthy ( 2 . 6 5 , 10.6) 61°36'N, 143O41'~

Summary: Shear zone about 1 m thick between Triassic Nikolai Green- stone and a latite body about 9 m thick; Triassic Chiti- stone Ls.on other side of latite. Shear zone stained with limonite and malachite; small amounts of pyrite and chalcopyrite; free gold reported. Geochemical sample contained 0.1 pprn Au, 1.5 ppm Ag, 1,000 ppm As, 200 ppm Cu, 700 ppm Zn. o off it and Mertie, 1923 (B 745); Van Alstine and Black, 1946 (B 9 4 7 4 ) ; MacKevet t, 1976 (MF-773~11

References Moffit and Mertie, 1923 (B 745), p. 136 Van Alstine and Black, 1946 ( B 9 4 j - ~ ) , p . 138 Berg and Cobb, 1967 (B 1246), p . 43 MacKevett and Cobb, 1972 (MF-395), lot. 23 MacKevett, 1976 (MF-773B), lot. 126 MacKevett and Holloway, 1977 (OF 77-169A), p. 34, loc. 74 MacKevett and others, 1978 (GQ-1418), loc. 26

( p o r c u p i n e C r . ) Copper, Gold C h i s t o c h i n a d i s t r i c t McCarthy (1.3-1.75, 10.95-11.15) klF-773B, l o c . 135 [ i n p a r t ] 61°37'-61°38'N, 143°47'-143051'V

Summary: Open cuts and a d i t s i n s h e a r e d T r i a s s i c N i k o l a i Greens tone c u t by J u r a s s i c d i o r i t i c d i k e s . C h a l c o p y r i t e , p y r i t e , and t h e i r o x i d a t i o n p r o d u c t s and , r e p o r t e d l y , a l i t t l e g o l d . offit it and M e r t i e , 1923 ( B 745 ) ; MacKevett , 1976 ( ~ ~ - 7 7 3 ~ ) ] I n c l u d e s r e f e r e n c e s t o B lackbu rn . See a l s o ( C l e a r C r . ) ; some of o l d p r o p e r t i e s on b o t h s i d e s of d i v i d e between c r e e k s .

Re fe rences M a f f i t , 1913 ( B 5421, pa 83 M o f f i t , 1918 ( B 6 6 2 ) , p . 158 M o f f i t and M e r t i e , 1923 ( B 7 4 5 ) , p . 128 MacKevett and Cobb, 1972 (MF-395), l o c . 19 MacKevett , 1976 (MF-773B), lot. 135 MacKevert and Holloway, 1977 ( O F 77-169A), p . 34, l o c . 82 MacKevett and o t h e r s , 1978 (GQ-1418), l o c . 24

(Porphyry M t n . ) Copper, Gold, Molybdenum

Nizina district MF-773B, IOC. 77

Summary: Quartz vein as much as 0.5 m thick intermittently distributed along a fauLt cutting a Tertiary pluton. Molybdenite, mainly a l o n g selvages of vein. Minor gold v a l u e s . Chalcopyrite is a minor to trace constituent. About 120 m of underground workings. [ ~ a c ~ e v e t t , 1976 (MF-773B) ; MacKevetr and Smith, 1968 ( C 604)] Includes reference to Bonanza Gold Mining Co.

Re Eerences Brooks, 1914 (B 5 9 2 ) , P. 61 MacKevett, 1965 (1-438j MacKevett and Smith, 1968 (C 6 0 4 ) , p. 2-3, 6, 8-9, 14 (samples 1-7) MacKevett and Cobb, 1972 (MF-395), loc. 48 MacKevett, 1974 (GQ-1146) MacKevert, 1976 (MF-773~), loc. 77 MacKevett and Holloway, 1977 (OF 7 7 - 1 6 9 8 ) , p . 3 2 , loc. 41

( P t a r m i g a n Cr. ) G o l d ( ? )

Ch i s ana d i s t r i c t McCarthy ( 2 4 . 4 , 1 7 . 2 5 ) app rox . 6 1 ° 5 7 ' N , 141°03'W a p p r o x .

Summary: Unverified report of finding workable,placer ground on lower Pta rmigan Cr. i n 1914. [ ~ a p p s , 1916 CB 6 3 0 ) ]

References Capps, 1915 (B 622 ' ) , p . 223 Capps, 1916 ( B 6 3 0 ) , p . 116

( R a b b i t Cr.) Copper

Chisana d i s t r i c t McCarthy ( 2 4 . 7 , 15 .35 ) app rox . 6 1 ' 5 1 ' ~ ~ 141°01'bJ a p p r o x .

Summary: 2 0 - f t . a d i t d r i v e n on an i r o n - and c o p p e r - s t a i n e d s h a t t e r e d zone i n b a s a l t . F r e s h rock c o n t a i n s s p a r s e l y d i s s e m i n a t e d c h a l c o p y r i t e . offit it and Knopf, 1910 ( B 4 1 7 ) ] Most r e c e n t geologic map o f a r e a [ ~ a c ~ e v e t t , 1978 (I-1032)] shows a r e a u n d e r l a i n by Q u a t e r n a r y and T e r t i a r y Wrangel l Lava.

Refe rences M o f f i t and Knopf, 1909 (B 3 7 9 ) , p . 1 7 5 M o f f i t and Knopf, 1910 (B 4171, p . 57 Berg and Cobb , 1967 ( B 1 2 4 6 ) , p . 209

Radovan Antimony, Copper, Silver

Nizina district MF-773B, locs. 65-67

McCarthy (13.6-13.85, 7.2-7.6) 61'24'-61°26'N, 142°2L'-142023'W

Summary: Three prospects. Low Contact prospect (MF-773B, loc. 65) is sporadically distributed chalcocite, chalcopyrite, pyrite, marcasite, realgar, and stibnite in a brecciated fault zone that juxtaposes Triassic Nikolai Greenstone and Chitistone Ls.; explored by trenches and short adits. Sample of float from below prospect contained 100 ppm Ag. Binocular prospect ( ~ ~ - 7 7 3 B , loc. 66) consists of small malachite-stained chalcocite masses in near-basal Chitistone Ls. and nearby copper-stained outcrops. The Greenstone prospect (MF-773B, lac. 67) is a chalcocite-rich vein 1-3 m thick in a fault cutting Nikolai Greenstone; explored by 2 short adits. [~ac- Kevett, 1976 (MF-773B)I

References Miller, 1946 ( B 947-F), p. 98, 114-117 Sainsbury, 1952 (OF 611, p . 2-3, 13-19 Berg and Cobb, 1967 (B 12461, p . 5 3 , 60-61 MacKevett and Smith, 1968 (C 6041, p . 2-3, 6-9, 14 (samples 37-49) MacKevett, 1970 (B 1333), p. 30 MacKevett and Cobb, 1972 (MF-3951, l o c s . 60-63 MaoKevett and Smith, 1972 (GQ-943) MacKevett, 1976 (~~-773B), 10~s. 65-67 MacKevett and Holloway, 1977 (OF 77-1696), p. 31, locs. 30-32

Regal (Mining Co.) Copper


McCarthy (8.65, 9 . 8 ) 61033'N, 142058 'W

Summary: Chiefly malachite-rich coatings, veinlets, and disseminations in basal Triassic Chirisrone Ls.; some chalcocite and bornite present. Developed by 3 inclines and other underground workings (total length more than 760 ft.) and by a few pits in nearby Triassic Nikolai Greenstone. Was minor production. [~ac~evett , 1976 (MF-773B) ; Miller, 1946 (B 947-F)] Includes references to Great Northern Development Co. if obviously to this property.

References Brooks, 1915 (B 6 2 2 ) , p. 44 Moffit, 1915 (B 6 2 2 ) ) p. 115 Moffit, 1918 ( B 6621, p, 163 Miller, 1946 (B 947-F), p. 101-103 MacKevett and Radtke, 1966 ( P 550-B), p. B166-B167 Berg and Cobb, 1967 (B 1246), p . 57 MacKevett, 1972 (GQ-979) ~ a c ' ~ e v e t ~ and Cobb, 1972 (MF-39.5)) lot. 3 9 MacKevett, 1976 (MF-773B), loc. 97 MacKevett and Holloway, 1977 (OF 77-169~), p. 33, loc. 53

(Rex C r . ) ( G u l c h ) G o l d , Holybdenum, S i l v e r

N i z i n a d i s t r i c t HF-773B, l o c . 39

Summary: B o t h bench and s t r e a m p l a c e r s mined on t h i s t r i b u t a r y o f C h i t i t u C r . On u p p e r Rex C r . [ e x a c t l o c a t i o n n o t known] a v e i n less t h a n k i n . t h i c k i n a p r o p h y r y d i k e c o n s i s t e d of q u a r t z w i t h m o l y b d e n i t e and p y r i t e a n d a s s a y e d 0 . 1 8 o z . g o l d and 1 2 . 80 o z . s i l v e r p e r t o n . o off it and Capps , 1 9 1 1 ( B 4 4 8 ) ] Mosr o f r e p o r t s l i s t e d be low lump d a t a f o r Chitutu C r . and i t s t r i b u t a r i e s o r s t a t e t h a t t h e r e w a s p l a c e r m i n i n g i n s p e c i f i c y e a r s . S e e a l s o ( C h i t i t u C r . ) .

R e f e r e n c e s M o f f i t , 1910 ( B 4 4 2 ) , p . 162 M o f f i t a n d C a p p s , 1 9 1 1 ( B 4 4 8 ) , p . 98-100, 103-107 M o f f i t , 1912 ( B 5 2 0 1 , p . 107 M o f f i t , 1913 (B 5 4 2 1 , p . 85 B r o o k s , 1 9 1 4 ( B 5 9 2 ) , p . 6 2 M o f f i t , 1915 ( B 6 2 2 ) , p . 115-117 B r o o k s , 1916 (B 6 4 2 ) , p . 43 S m i t h , 1917 (BMB 1 5 3 1 , p . 33 M o f f i t , 1 9 2 1 (B 7 1 4 ) , p . 196 B r o o k s , 1922 (B 7 2 2 ) , p . 39 Brooks a n d Capps, 1 9 2 4 (B 7 5 5 ) , p . 27 M o f f i t , 1 9 2 4 ( B 7 5 5 ) , p . 69-70 S m i t h , 1926 (B 7 8 3 ) , p . 12 S m i t h , 1930 (B 8 1 0 ) , p . 21 S m i t h , 1930 ( B 8 1 3 1 , p . 24 S m i t h , 1932 ( B 8 2 4 1 , p . 28 S m i t h , 1933 (B 8 3 6 1 , p . 27 S m i t h , 1933 (0 844-A) , p . 28 . S m i t h , 1934 (B 857-A), p . 26 S m i t h , 1 9 3 4 (I3 864-A), p . 30 S m i t h , 1936 ( 0 8 6 8 - A ) , p . 31 S m i t h , 1937 ( B 880-A) , p . 3 4 M o f f i t , 1938 ( B 8 9 4 1 , p . 1 2 8 S m i t h , 1938 ( B 897-A) , p . 40-41 S m i t h , 1939 ( B 9 1 0 - ~ ) , p . 38-39 S m i t h , 1939 ( B 917-A), p . 3 7 S m i t h , 1941 ( B 926-A), p . 3 4 S m i t h , 1942 ( B 933-A), p . 33 Moxham and Nelson, 1952 ( C 1 8 4 ) , p . 3 Wedow a n d o t h e r s , 1952 ( O F 511, p . 1 0 8 MacKevett, 1965 (MF-438) Berg a n d Cobb, 1967 (B 1 2 4 6 ) , p . 63 MacKevet t and Cobb , 1972 (MF-395) , loc. 90 Cobb, 1973 ( B 1 3 7 4 ) , p . 30 MacKeve t t , 1976 (MF-773B), !OC. 39

(Roaring Cr.) Copper

Chistochina district McCarthy (1.4-1.75, 11.9-12.1) MF-773B, locs. 159, 160 61'41 ' - 61°42 'N, 143"47'-143~50'~

Summary: Several prospects, marked by old, largely caved workings, on thin veins t h a r variously contain small quantities of chalcopyrite, bornite, chalcocite, and malachite and cut Permian sedimentary rocks or gabbro or Triassic Nikolai Greenstone. [ ~ a c ~ e v e t t , 1976 (MF-773~)] Includes r e f e r - ences to prospects on east branch of Roaring Cr., which may be on part of Skyscraper property. See also Skyscraper.

References Moffit and Maddren, 1908 ( B 3 4 5 ) , p . 139 Moffit and Maddren, 1909 (B 3741, p. 56-57 Hoffit, 1915 (B 6 2 2 ) , p. 111 Moffit and Mertie, 1923 ( B 745), p. 107 Berg and Cobb, 1967 (B 1246), p . 44 MacKevett and Cobb, 1972 (MF-395), loc. 11 MacKevett, 1976 (MF-773B), locs . 159, 160 MacKevett and Holloway, 1977 (OF 77-169A), p . 35, loc. 96 MacKevett and others, 1978 (GQ-1418), locs. 15, 16

( R o c k e r C r . ) Gold

C h i s a n a d i s t r i c t ?IF-773B, l o c . 184

Summary: P l a c e r g o l d o c c u r r e n c e . S t r e a m d r a i n s a r e a u n d e r l a i n by T e r t i a r y f e l s i c h y p a b y s s a l rocks a n d T e r t i a r y and Q u a r e r - n a r y Wrangell Lava. [ ~ a c ~ e v e t t , 1976 ( M F - 7 7 3 ~ ) ] No o t h e r data on o c c u r r e n c e .

R e f e r e n c e s M a c K e v e t t , 1976 (MF-773B), l o c . 184 MacKevett a n d Hol loway , 1977 ( O F 77-169A) , p . 3 6 , l o c . 119

Schultze Copper


Summary: Small chalcocite-rich pod and chalcocite-bearing stringers in lowerpart of Traissic Chitistone Ls. Explored by 2 short adits. Kennecott-type deposit. [~ac~evett, 1976 (MF-773B) ; MacKevett and Holloway, 1977 (OF 7 7 - 1 6 9 ~ ) ] Note: name not used in several of the references listed below.

References MacKevett, 1965 ( 1 - 4 3 8 ) Berg and Cobb, 1967 ( B 12461, p. 58 MacKevett and Cobb, 1972 (MF-395), Loc. 50 MacKevett, 1974 (GQ-1146) MacKevett, 1976 (~F-773B), loc. 74 MacKevett and Holloway, 1977 (OF 7 7 - 1 6 9 A ) , p . 3 2 , loc. 39

( S h e e p Cr.) Copper

Chisana district MF-773B, LOC. 148

McCarthy (19.5, 12.2) 610401N7 141039'W

Summary: Caved adit in amygdaloidal Triassic Nikolai Greenstone. Native copper, cuprite, chalcocite, and malachite in amygdules. [capps, 1916 (B 630) ; MacKevett, 1976 ( M F - 7 7 3 ~ 1 1

References C a p p s , 1916 (B 6301, p . 124 - - K n a e b e l , 1970 (GC 21); p . 17 MacKevett and Cobb, 1972 (MF-395), l o c . 85 MacKevett, 1976 (MF-773B), l oc . 148 MacKevett and Holloway, 1977 (OF 77-169A), p. 34, l o c . 90

(Shower Gulch) Copper

Chistochina district MF-773B, ~ O C . 164

McCarthy (2.4, 12.75) 61'44'~~ 143'43'~

Summary: Sparsely distributed native copper in upper, arnygdaloidal parts of flows of Triassic Nikolai Greenstone. A little chalcopyrite and chalcocite also present. Explored by open cuts. [~ac~evett, 1976 (MF-773B) ; Mof f it and Mertie, 1923 ( B 745); Mendenhall, 1905 (P 4 1 ) ] Includes references to: Copper King (Kotsina R . ) , Keystone.

References Mendenhall and Schrader, 1903 ( P 151, p . 19 Mendenhall and Schrader, 1903 ( B 213), p. 146-147 Mendenhall, 1905 ( P 41), p. 94-95 Mof f it and Maddren, 1908 ( B 3 4 5 ) , p . 141 Moffit and Maddren, 1909 (B 3 7 4 ) , p . 58-59 Moffit and Mertie, 1923 (B 745), p . 107-108 Moffit, 1924 ( B 755), p . 67 Moffit, 1938 ( B 8 9 4 ) , p. 124 Berg and Cobb, 1967 (B 1246), p . 44 MacKevett and Cobb, 1972 (MF-395), loc. 15 MacKevett, 1976 (MF-773B), loc. 164 MacKevett and Holloway, 1977 (OF 77-169A), p. 35, loc. 100 MacKevett and others, 1978 (GQ-1418), loc. 7

Silver Star Bismuth, Copper, Lead, Silver, Zinc

Chistochina district McCarthy (0.8-0.85, 12.85-12.95) MF-773B, locs. 175, 176 61°44'N, 143O54'~

Summary: Open cuts and 2 adits on t h i n quartz veins that contain argentiferous tetrahedrite, copper minerals, galena, and sphalerite; samples assayed 25 to 700 oz. silver per ton. A s m a l l amount of a bismuth-bearing mineral t h a t may be bismuthinite is also present. Country rock Triassic Nikolai Greenstone near contact with Permian Hasen Creek F m ; small intrusive bodies of Jurassic granodiorite and Tertiary hyp- abyssal rocks nearby. offit it and Mertie, 1923 (B 7 4 5 ) ; MacKevett, 1976 (MF-773B); MacKevett and others, 1978 (GQ- 1418)] Name of prospect nor used in several references.

References Moffit, 1915 ( B 6221, p - 110 Moffit and Mertie, 1923 (B 7451, p . 87, 110-112 Moffit, 1938 (B 8941, p . 125, 129-130 Berg and Cobb, 1967 (B 1246), p. 43 MacKevett and Cobb, 1972 (MF-395) , loc. 5 Henning and Dobey, 1973 (AOF 251, p. 7 MacKevett, 1976 (MF-773~), locs. 175, 176 MacKevett and Holloway, 1977 (OF 7 7 - 1 6 9 ~ ) ~ p. 35, loc. 111 MacKevett and others, 1978 (GQ-1418), loc. 2 [in part]

Skyscraper Copper


McCarthy (1.7, 12.3) 61°42'N, 143048'W

Summary: Several short exploratory adits. Chalcocite and native copper in thin veins and local disseminations in Triassic Nikolai Greenstone. [~ac~evett, 1976 ( ~ ~ - 7 7 3 ~ ) ] Includes references to: Davy, Eleanor. See also (Roaring Cr.).

References Mendenhall and Schrader, 1903 (P 15), p . 19-20 Mendenhall and Schrader, 1903 (B 213), p. 145-146 Mendenhall, 1905 ( P 41), p - 95-96 Moffit and Maddren, 1908 (B 345), p. 139 Noffit and Maddren, 1909 ( B 374), p. 57 Moffit, 1915 ( B 622), p. 110-111 Moffit and Mertie, 1923 ( B 745), p . 88-89, 106-107 MacKeveCt and Cobb, 1972 (MF-395), loc. 12 MacKevett, 1976 (MF-773B), loc. 161 MacKevett and Holloway, 1977 (OF 77-169~), p. 35, loc. 97 MacKevett and others, 1978 (GQ-1418) , loc. 11

Snow Bird Copper, Silver

Nizina district MF-773B, lot. 71

Summary: Vein 0.5-1.5 rn thick in shear zone that cuts Triassic Nikolai Greenstone; conta.ins bornite, chalcocite, chalcopyrite, and pyrite in quartz-calcite gangue. Explored by 2 short adits. Sample of a bornite-rich pod contained 50 pprn Ag. [~ac~evett, 1976 (MF-773B); MacKevett and Smith, 1968 (C 6 0 4 ) ] Includes references to copper prospect near Boulder Cr.

References Moffit, 1918 (B 6 6 2 ) , p . 176-177 Miller, 1946 (B 947-F), p. 120 MacKevett, 1965 (1-438) Berg and Cobb, 1967 (B 1246), p . 62 MacKevett and Smith, 1968 (C 6041, p . 8-9, 14 (samples 9-12) MacKevett and Cobb, 1972 (~~-395), loc. 64 MacKevett , 1974 (GQ-1 146) MacKevett, 1976 (MF-Y~~B), loc. 71 MacKevett and Holloway, 1977 (OF 7 7 - 1 6 9 ~ ) , p. 31, loc. 36

(Srre lna Cr. ) Copper


McCarthy (0.1, 10.9) 61°37'N, 143059'W

Summary: Old prospect pit on 2-m-wide altered faulr zone in Triassic Nikolai Greenstone that contains sporadically distributed pyrite-calcite veins wtih minor copper staining. [M~c- Kevett, 1976 ( ~ ~ - 7 7 3 ~ ) ]

References Schrader and Spencer, 1901, p . 85 Mendenhal l and- Schrader, 1903 ( P IS), p. 27 g end en hall, 1905 (P 4 1 ) , p . 103 Moffit and Maddren, 1908 ( B 3 4 5 ) , p. 155 Moffit and Maddren, 1909 (B 3 7 4 ) , p . 74 MacKevett and Cobb, 1972 (MF-3951, loc. 16 MacKevett, 1976 (MF-773B), Loc. 147 MacKevett and Holloway, 1977 (OF 77-169A), p . 34, Loc, 89 MacKevett and others, 1978 (GQ-1418), l o c . 19

(Surprise Cr.) Copper

Chistochina district MF-7738, lot, 173

Summary: Several old prospects on adjoining claims near Surprise and Sunshine Creeks; explored by open curs and a few short adits. Mainly on chalcocite-, bornite-, and chalcopyrite- bearing veins in faulted Triassic Nikolai Greenstone and Jurassic granodiorite. [~ac~evett , 1976 (MF-773~)] In- cludes references to: Hubbard, Laddie, Sheehan.

References Mendenhall, 1905 (P 41), p . 123 Moffit and Maddren, 1908 ( B 3 4 5 1 , p . 141-142 Moffit and Maddren, 1909 (B 374), p. 59-60 Moffit, 1910 (B 442 ) , p. 161 Moffit, 1915 (B 6 2 2 ) , p. 110 Moffit and Mertie, 1923 (B 7451, p. 89, 108-110 Berg and Cobb, 1967 ( B 1246), p . 44 MacKevert and Cobb, 1972 (MF-395), loc. 14 MacKevett, 1976 (MF-773B), loc. 173 MacKevett and Holloway, 1977 (OF 77-1698), p . 35, loc. 109 MacKevett and others, 1978 (GQ-1418), loc. 4

T a y l o r Copper


Summary: At and near contact between a Tertiary felsic pluton that contains disseminated pyrite and Cretaceous hornfels; irregular sulfide-bearing pods a long c o n t a c t ; a few narrow quartz veins. Chalcopyrite is a minor r o trace constituent. Geochemical samples contained as much as 15.4 ppm Au, 5 ppm Ag, 2,000 ppm Cu. [~ac~evett, 1976 (MF-773B); MacKevett and Smith, 1968 ( C 6 0 4 ) ]

References MacKevett and Smith, 1968 ( C 6041, p. 2-3, 6, 10-11, 15 (samples 71-79) MacKevett, 1970, ( B 1333), p . 30 MacKevett and Cobb, 1972 (MF-3951, loc. 71 MacKevett and Smith, 1972 (EQ-943) MacKevett, 1976 (~ ! ? -773B) , LOC. 55 MacKevett and Holloway, 1977 (OF 77-1696), p. 31, l o c . 25

(Texas Cr.) Antimony


McCarthy (13 .8 , 6 . 5 ) 6 1 ° 2 2 ' ~ , 142'22 ' W

Summary: Float of stibnite-bearing b r e c c i a t e d quartz v e i n . Geochemical sample contained more than 10,000 ppm Sb and 500 ppm A s . [ ~ a c - Kevett, 1976 (MF-773~)]

References MacKevett and Smith, 1968 ( C 6 0 4 ) , p . 6, 10-11, 15 (Loc. 59 ) MacKevett, 1976 ( ~ ~ - 7 7 3 B ) , l o c . 51

Tjosevig Copper

Nizina d i s t r i c t MF-773B, loc . 88

McCarthy (10.3, 8.85) 6 1 ° 3 0 ' ~ , 1 4 2 O 4 6 ' ~

Summary: A Kennecott-type deposit i n the lower p a r t of the Triassic Chitistone Ls. Known deposits (largely malachite and azurite) are small. Explored by a short (now-caved) a d i t . [ ~ a c ~ e v e t t , 1976 (MF-773B); Miller, 1946 ( B 947-F)]

References Miller, 1946 ( B 947-F), p . 104-105 MacKevett, 1965 (1-438) Berg and Cobb, 1967 ( B 1246), p. 57 MacKevett a n d Cobb, 1972 (MF-395), l o c . 46 MacKevett, 1974 (GQ-1146) MacKevett, 1976 (MF-773B), l o c . 88 MacKevett and Holloway, 1977 (OF 77-169A), p 32, loc. 48

War Eagle Copper, Iron


Summary: A contact-metamorphic d e p o s i t in metamorphosed Triassic Chitistone Ls.adjacent to Jurassic granodiorite. Mineral- ized zone as much a s 8 m thick contains magnetite, pyrrhotite, pyrite, and minor chalcopyrite. Prospected by a d i t and surface cuts. [~ac~evctt, 1976 (MF-773B); MacKevett and others, 1978 (GQ-1418)] Includes references to (Mac- Dougall Cr.). See also Calcite.

References Moffit, 1915 (B 6 2 2 ) , 114 Moffit, 1918 ( B 662), p. 160 Moffit, 1921 ( B 7141, p . 192 Moffit and Mertie, 1923 (B 7 4 5 ) , p . 137-139 Moffit, 1924 ( B 7 5 5 ) , p . 65-66 Moffit, 1938 (B 894), p . 117, 122-123, 126 Van Alstine and Black, 1946 (B 947-G), p . 139-140 Berg and Cobb, 1967 ( B 1246), p. 42 MacKevett and Cobb, 1972 (MF-395)) l o c . 26 MacKevett, 1976 (MF-773B), l o c . 130 NacKevett and Hol loway , 1977 (OF 77-169A), p. 34, l o c . 79 MacKevett and others, 1978 (GQ-1418), loc. 32

Narner Copper

C h i s t o c h i n a d i s t r i c t >IF-773B, l o c . 1 6 9

McCarthy ( 0 . 3 5 , 12 .4 ) 6 l 0 4 1 ' N , 143057'W

Summary: Minor amounts of b o r n i t e , c h a l c o p y r i t e , and m a l a c h i t e i n a b r e c c i a t e d q u a r t z - c a l c i t e v e i n a b o u t 1 m t h i c k t h a t c u t s T r i a s s i c N i k o l a i Greens tone . Exp lo red by a s h o r t a d i t . Geochemical sample c o n t

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REFERENCES - Alaska DGGS › webpubs › usgs › of › text › of80-0885.pdfmore than their...

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