2000
3000
3000
3000
4000
2000
3500
2500
3000
3500
4000
2500
2500
20002500
1000
2000
10001500
1500
1500
1000
1500
500
500
3500
3000
3000
3500
2000
1500
1500
1000
1000
500
500
500
1000
Fowler
Fowler
LilSore
Creek
Creek
Creek
Cre
ekZi
nc
Creek
Bruin
Cub
Cre
ek
Creek
Cliff
Creek
Greens
Creek
Gallagher
CreekSore
Big
Creek
Greens
Creek
Cascade
Creek
Zinc
YOUNG BAY
KillerCreek
Ha
wk
I n
l et
25
65
70 22
30
80
30
70
30
65
70
75
504072
38
70
40
85
58
75
50
70
46
80
4878
30
12
80
4070
5875
55
85
50
55
80
25
80
35
40
55
30
70
20
88
5568
55
25
30
70
70
80
45
45
20
50
6020
65
3280
80
25
35
45
2870
55
8040
55
75
75
40
3085
3535
50
38
82
2020
2035
25
80
28
65
20
70
20
80
205026
55
10
20
40
0
10
15
30
1050
2880
10
35
2050
80
10
4040
20
78
80
20
20
35
35
20
15
30
20
30
15
20
10
20
10
15
65
30
30
20
30
3320
20
65
40
40
40
40
20
YOUNG BAY SHEAR ZONE
YOUNG BAY SHEAR ZONE
HAWK
IN
LET SHEAR ZON
E
ZINC
CREEKTHRUST
UPPER
UPPER
SHEAR
SHEAR
ZONE
ZONE
CLIFF CREEK
THRUST
GALLAGHER
FAULTSYSTEMGREENS
CREEK
THRUST
MAKI FAULT SYSTEM
A–ROAD
Cannery
SerpentineGulch
Killer CreekSerpentinite
B–R
OA
D
B–ROAD
Gallagher
Ridge
HawkInlet
Limestone
Blu
ff
A–Road Prospect
Lil Sore
Lower Zinc CreekUpper Zinc Creek
Lakes District
Mammoth Claims
Mammoth Ridge
Upper Bruin Creek
Lower Bruin Creek
Cub Creek
Upper Cliff Creek
Mine Portal
Gallagher Creek
Big Sore
Killer Creek
LowerCascade
UpperCascade
40
70
8040
70
76
70
70
40
65
65
55
72
72
8080
50
70
55
20
4583
5070
35
20
50 4065
45
6530
60
3065
257085
4570
25
40
5055
8055
75
50
48
32
70
45
65
505525
60
80
75
8065
65
7080
75
50
70
7050 30
28
80
40
60
60
5080
25 20
40
8060
60
30 70 708030
45 35
7070
40
4060
7550
30 30
4570
45
45
80
4545
20
45
70
42
50
40
40
4070
6550
30
70
80
60
4850
30 75
8048
32
40
65
7035
70
60
45
3570
40
5535
30
2030
24 25
6555
80
60
70
50
2525
60
30
60
30
30
26
80
78
5025
55
50
44 70
42
20
50
40
25
42 42
8030
45
70
40
40
80
40
2075
75
1080
80
80
40
60
2040
45
40
80
2540
40
50
65
70
20
70
65 4535
60
60
55
30
15
70
55
72
60
30
60
7070
70
3040
40
4035
50
70
30
7070
20
45
70
75
35
60
70
45
60
654545
8375
60
20
50
60
1080
20
85
4025
30
40
20
50
Greens CreekMine
Pcs
Pcs
Pcp
Pcs
Drg
^hba
Qhse
^hpb
^hpb
^h(?)am
^h(?)am
^ha
^hba
Drg
Pcp
Qhpb
Drg
^ha
Drg
^hpb
Drg
^hpb
Pcp
KJs
^hpb
Drpb
Pcpw
^hpb
Drg
Drg
^hba
^hba
Pcp
^ha
^ha
^hba
^hba
Qha
^hc
^hba
^hba
Pcpw
Drg
^ha
^hpb
Drm
Drg
Pcs
Drg
Drpb
Drpb
Drg
^hgb
^hgb
^hba
^ha
Drpb
Drpb
^hpb
^ha
^ha
Drg
Drg
^ha
^hba
^hse
^ha
Drpb
Drg
^ha
^hba
^hbx
Drg
^hgb
Qhgc
Drpb
^hgc
Pcpw
Qha
Pcpw
Pcpw
^hgb
^ha
^hgb
Drg
Qhse
Drpb
Pcpw
^hpb
Drg
Pcs
Pcpw
Drg
^h(?)am
Drg
^hse
^hsr
^hgb
^hgb
Pcpw
Pcpw
^hbx
^ha
^ha
^h(?)am
Drg^hgc
Drg
Drg
Drpb
^hbx
^ha
Pcpw
^hbx
^hse
Drg
^ha
^hc
^hgb
^ha
^hgb
^hse
Drpb
^hgb
^hsr
^hsr
Pcpw
^hse
^hba
Drm
^hbx
Pcpw
^hl
Pcpw
^hsr
^hsr
Pcpw
^hgc
^hpb
^hse
^hpb
^hl
^ha
Drpb
^hc
^hpb
^hpb
Qhc
^ha
Drg
^hpb
^hsr
^ha
^hl
^ha
2,000 ft
3,000 ft
-1,000 ft
-2,000 ft
1,000 ft
Sea level
2,000 ft
3,000 ft
1,000 ft
B
^hgb
^ha
Drg
Drpb
^haDrpb
Drg
^hbx
Hyd
Unco
nfor
mity
Drm Drg
Pcs
B'
PcsDrg
Drg
Drg
^hbx
^hpb
^ha
^hc
^hgb ^ha
^hgb
^hgb
^ha
^hse
^ha^hc
^hpb
Drg
^ha
^ha
^hc
^hba
^hba
KJs
B"
-1,000 ft
-2,000 ft
Sea level
Looking west Looking north-northwest
-1,000 ft
1,000 ft
2,000 ft
3,000 ft
4,000 ft
-2,000 ft
Sea level^h(?)am
Pcs
DrpbDrpb Drg
A
^hgb
^hse
Drg
^ha
^hse
^hse
Drg
Drg
Qhgb
^ha
Drg
Drg
Drg
Drg
Drg
Drg
^hse
^hse
^ha
^ha
Killer CreekSerpentinite
Looking north-northwest NO VERTICAL EXAGGERATION
NO VERTICAL EXAGGERATION
Looking northeast
^hgc
^hgc
Mammoth RidgeGreen Carbonate
unit
^ha^ha
DrgDrg
^hsr Drg
Greens CreekOre Horizon
F2 Lower Limbon Section
^ha
F2
Drg
^hpb
F3
Pcpw
Broad F3 Structural Arch
^ha
^ha
^hba
^hba
^hba
Drg
^hl
^h(?)am
A"A'
-1,000 ft
-2,000 ft
Sea level
-1,000 ft
2,000 ft
3,000 ft
F2
ZIN
C C
RE
EK
TH
RU
ST
YOUNG BAYSHEAR ZONE
GR
EE
NS
CR
EE
K T
HR
US
T
Big
Sore
Cre
ek
UPPER SHEAR ZONE
CLI
FF C
REE
K T
RU
ST
Projection of the upper shear zone
Lil S
ore
Cre
ek
Fow
ler C
reek
Zinc
Cre
ek
Gre
ens
C
reek
Greens CreekMine (office)
Gre
ens C
reek
B
B'
B″
A
A'
A"
134°45’ 515000mE 134°40’ 520000mE 134°35’ 525000mE
134°45’ 515000mE 134°40’ 520000mE 134°35’ 525000mE
58°10’
58°10’
6445000mN
6445000mN
58°05’
6440000mN
6435000mN
58°05’
6440000mN
6435000mN
SCALE 1: 24 0001 MILE1 1/ 2 0
7000 FEET1000 10000 2000 3000 4000 5000 6000
.5 1 KILOMETER1 0
CONTOUR INTERVAL 100 FEETNATIONAL GEODETIC VERTICAL DATUM OF 1929
Compiled by N.A. Duke and A.W. West in 2001Data sources: Early compilations by T.C. Crafford (1980s), area mapping by N.A. Duke (1995–2001), detailed mapping by P.A. Lindberg (1994–1998), J. M. Proffett (1997–2001), A.W. West (2000–2001), and C.M. Schrader (2000)
U.S. DEPARTMENT OF THE INTERIORU.S. GEOLOGICAL SURVEY PROFESSIONAL PAPER 1763
PLATE 4–1
Universal Transverse Mercator projection. 1927 North American Datum (NAD 27) 5,000-meter Universal Transverse Mercator grid ticks, zone 8, shown in blue100-foot contours are from 1997 AreoMap computer-drawn map,with modifications from field surveysContour elevations are relative to sea level
ALASKA
MAP LOCATION
Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
Although this information product, for the most part, is in the public domain, it also contains copyrighted materials as noted in the text. Permission to reproduce copyrighted items for other than personal use must be secured from the copyright owner. GEOLOGY OF THE GREENS CREEK MINE AREA, ALASKA
ByNorman A. Duke, Paul A. Lindberg, and Andrew W. West
2010
24°
TRUE
NOR
TH
MAG
NETI
C NO
RTH
APPROXIMATE MEANDECLINATION, 2001
Suggested citation:Taylor, C.D., and Johnson, C.A., editors, 2010, Geology, geochemis-
try, and genesis of the Greens Creek massive sulfide deposit, Admiralty Island, southeastern Alaska: U.S. Geological Survey Professional Paper 1763, 429 p., 7 plates on CD.
This and other USGS information products are available athttp://store.usgs.gov/ U.S. Geological SurveyBox 25286, Denver Federal CenterDenver, CO 80225
To learn about the USGS and its information products visithttp://www.usgs.gov/ 1-888-ASK-USGS
This report is available at:http://pubs.usgs.gov/pp/1763
Prepared in cooperation with the
KENNECOTT GREENS CREEK MINING COMPANY
EXPLANATION
Lithologic contact
Major fault—Brittle or ductile fault
D2 thrust fault—Sawteeth on upper (tectonically higher) plate
Inclined bedding (S0)—Showing strike and dip
Vertical bedding (S0)—Showing strike
Inclined S2 foliation—Showing strike and dip
Vertical S2 foliation—Showing strike
Inclined S3 foliation—Showing strike and dip
Vertical S3 foliation—Showing strike
L2 lineation—Showing bearing and plunge
L3 lineation—Showing bearing and plunge
D2 Fold—Showing plunge of axis and dip of axial plane
D3 Fold with inclined axial plane—Showing plunge of axis and dip of axial plane
D3 Fold with vertical axial plane—Showing plunge of axis
Overturned F2 or F3 fold—Showing axial trace of syncline (arrows ponting toward trough) or anticline (arrows pointing away from trough)
Prospects or mineral occurrences
BOUNDARIES
Admiralty Island National Monument
Experimental forest
Greens Creek joint venture
Land exchange
SURFACE FEATURES
Roads
Buildings
Streams
Waterbody
55
60
50
40
15
2035
3280
40
Juneau
Mansfield
Peninsula
Admiralty
IslandChatham
Strait
Young Bay
Stephens
Passage
DouglasIsland
Hawk
Inlet
MAP
AREA
134°30’134°45’135°00’ 134°15’
58°00’
58°15’
Inset map: Location of map, depicted in yellow, relative to the surrounding area.
Jurassic-Cretaceous
Upper Triassic
Seymour Canal flysch
HYD GROUP
Basalt
Limestone
Mine argillite
Conglomerate
Fault breccia
Siliceous rock
Serpentinite
Black phyllite
Permian-CarboniferousCANNERY FORMATION (?)
Siliceous white phyllite
Siliceous schistose sedimentary rock
Dolomitic phyllite
DevonianRETREAT GROUP
Greenstone
Marble
Gabbro Amphibolite
Green carbonate
Black phyllite
[See chapter 4 for more complete lithologic descriptions and a discussion of regional stratigraphic correlations.]
LIST OF MAP UNITS
KJs
^hgb ^h(?)am
^hl
^ha
^hc
^hbx
^hsr
^hse
^hpb
^hgc
^hba
Pcpw
Pcp
Pcs
Drm
DrpbDrg
DEFORMATION HISTORY
POST SEYMOUR CANAL FLYSCHD5—Major northwest-trending, generally right-lateral brittle or ductile faultsD4—Late reactivation of D2 thrust faults following D3D3—Northwest-southeast-trending chevron folds with spaced axial planar cleavageD2—Dominant east-west-trending, shallow, south-dipping, penetrative foliation
axial planar to recumbent isoclinal folds and north-verging thrusts (Zinc Creek and Upper Cliff Creek thrusts)
POST RETREAT GROUP, PRE CANNERY FORMATIOND1—Relict metamorphic segregation foliation in Retreat Group greenstone and
black phyllite
METAMORPHIC DOMAINSGreenschist facies—Greens Creek domain bounded by Young Bay shear zone
and Greens Creek thrust faultEpidote amphibolite facies—Northeast of Young Bay shear zone and southwest
of Greens Creek thrust faultGarnet amphibolite facies—South of Upper Cliff Creek thrust fault