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Ministry of HoriiMinister
Natural ^ . ,, nDr. J. K. Reynolds Deputy Minister
' c AuldC
Ontario
ONTARIO GEOLOGICAL SURVEY
PRELIMINARY MAP P.2353
GEOLOGICALSERIES
FLYING LOON LAKE AREA
WYATT LAKE SHEETDISTRICT OF KENORA
Mile K
Scale 1:15840
O TA '/. M MEa M w isq-pgr
Metrei 100 C 0." 0.6 l Kilomelre
NTS Reference: 52G/14 W
ODM-GSC Aeromagnetic Map: 1127G
ODM Geological Compilation Map 2169
OMNR-OGS 1980
Parts of this publication may be quoted if credit is given and
the material is properly referenced.
P 2 350
LDCATIOIM MAP Scale M 584000
LEGEND
PHANEROZOIC
CENOZOICQUATERNARY
PLEISTOCENE AND RECENT
Glacial dnfi, deposits
sand and gravel, swamp
UNCONFORMITY
PRECAMBRIAN
EARLY PRECAMBRIAN ARCHEAN
FELSIC TO INTERMEDIATE IN l RUSiVE ROCKS
7 Unsubdivided7a Massive to weakly foliated trondhjemite,
granodiorite '7b Foliated granodiorite, trondhjemite7c Quaitz
monzonite7d Diorite, quarts diorite c7e Aplite7g Xenolithic
granitic rocks7h Biotite, hornblende-biolitt; granitic rocks7j
Hornblende, biotite-homblende granitic
rocks7k Feldspar porphyritic granitic rocksTin Quart?.
feldspar-quartz porphyritic (sub
volcanic) granitic rocks7n Monzonite
INTflUSIVC CONTACT
ULTRAMAFIC INTRUSIVE ROCKS
6 Unsubdivided6a Peridotite, serpcntinized
peridotite6bPyroxenite, hornblendite
INTRUSIVE CONTACT
MAFIC INTRUSIVE ROCKS
5 Unsubdivided5;] Gabbro, diorite (l5bPorphyritic (feldspar)
gabbro, diorite d
INTRUSIVE CONTACT
METAVOLCANICS AND METASEDIMENTS
Chemical Metasediments
4 Unsuhdiviried4a Hematite-magnetite ironstone4f Chert
Clast .r
3 Umubdivided3a Sandstone3bWacke3c Arenite3d Arkose3L- Mudstone
":3f Siltstone3g Granitoid-clast conglomerate f3h Voicanrc-clast
conglomerate3 Sediment-clast conglomerate
Fe ! sic to Intermediate Metavolcanics
2 Unsubdivided?a Massive fine- to medium-grained flowsyd
Amygdaloidal, vesicular flows2f Quartz porphyritic, [juartMeldspai
porphy
ritic flows, tuffs2mTuff-breccia2nTuff, lapilli-tuff2v Quartz
porphyry, feldspar-quat t? porphyry
(subvolcanic) intrusive rocks
Intermediate To Mafic Melavolcamcs
1 Unsubdivided1ii Massive fine- to medium-grained flows1 b
Massive medium- to coarse-grained Hows 91 L Medium to coarse-yi
ained synvolcanic sills
(flows)1 d Amygdaloidal, vesicular flows le Pillowed flow;,If
Porphyritic (feldspar/amprvbole) f lows lg Volcanic breccia1h
Hyalorlastic breccia (pillow breccia) 1j Auloclastic (flow,
crumble) breccia ImTuff-breccia In Tuff, lapilli-tuff lo Variolitic
flows 1p Amphibolitized flows 1q Calc-alkaline (basalt, andesite)
flows
NOTES:
d) This is basically a field legend and may be changed as a
result of subsequent laboratory investigations.
b) May include subvolcanic intrusive rocks.
c) May include some mafic intrusive rocks.
d) May include some medium- to coarse-grained mafic
metavolcamcs.
ei Includes argillite, slate, shale.
f) Includes some subvolcanic porphyry clasts.
g} May include some mafic intrusive rocks.
h) Coded to show distribution of metavolcamcs predom inantly of
calc-alkalme affinity; other mafic to inter mediate metavolcamcs
are predominantly of basaltic tholeiite aff'nity.
The letter "G" preceding a rock unit (e q G6) indicatesunits
interpreted from Geophysical Data. Not al: unitsappear on all
maps.
MARGINAL NOTES
LOCATION AND ACCESS
The Flying Loon Lake map-area is approximately bounded by
Longitudes 91 13' and 92 QO'W, and Latitudes 49 - 45' and 50 02'N.
The centre of the area lies about 30 km southeast of Sioux
Lookout.
Access to the area is provided by Highway 642, lumber roads off
the highway, and by float-equipped aircraft for the southwestern
part,
MINERAL EXPLORATION
The aiea has been prospected for gold intermittently since the
turn of the century.
Several base metal sulphide deposits were discovered in the
Stuigerjn Lake jrca, just east of the present map-area, in the
period 1969 to 1972. These discoveries lead to extensive
prospecting of area. Airborne and ground geo physical surveys and
follow-up diamond drill programs to check geophysical anomalies
have been conducted by several companies (see property list).
GENERAL GEOLOGY
The map-area covers a portion of an Early Precambrian (Archean)
volcanosedimentary bell bordered on the noith and south by
intrusive yranitic complexes both of which extend outside the
present map atca, Stratigraphic termi nology in the text is used in
the informal sense
The volcanosedimentary belt comprises mafic meta- volcanics.
Although they are dominantly Tholeiitic basalt in composition, two
sequences of calc-alkaltnf basalts and andesites occupy the
northwestet n part I.Neepawa Group) of the map-area and a small
area within the northeastern part of the map-area respectively The
Neepawa Group consists of both calc-alkaline and tholeiitic
volcanics. Caic-alkaline rocks are designated map unit Iq. The
mafic metavolcamcs consist predonrnantly of flows and are variably
massive, pillowed, amygdaloidal, and/or pot phyiitic. Autoclastic
and pyroclastic fragmental rocks occur locally and make up a
substantial port.on of the calc alkaline sequences.
Substantial accumulations of felsic to intermediate meta-
volcanics occur in northeastern Southeast Bay and the Loggers Lake
area. These rocks occur sparsely throughout the remainder of the
map-area
These consist of tuff, lapilli-tuff, and tuff-breccia at
Southeast Bay and tuff and lapilli-tuff as interflow beds between
mafic metavolcanic flows at Loggers Lake.
Thin interflow beds of wacke-siltstone occur throughout the
area; significant sequences occur (1) un and south of Minnitaki
Lake (Minnitaki Group), (2) at Loggers Lake, (3) north of Smock
Lake, and (4I at Towers Lake. Clastic metasediments consist of
sandstone including wacke, arkose and arenite; siltstone and
mudstone; and conglo merate. A major /one of chenrcal metasediment^
consist ing of interbedded clastic metasediments and chert with
hematite-quartz-magnetite (locally sulphide-bearing) iron stone
occurs in the southern portion of the Minnitaki Group extending
from the western boundary of the area eastxvards to the eastern
shore of Southeast Bay.
Ultramafic intrusive rocks consisting of pyroxenite and
perdotite occur ar the confluence of Pen Creek and the English
River west of Way Lake respectively, A large differentiated mafic
intrusion, the Pike Lake Pluton, is situated m the eastern part of
the map-area.
Only the border ?ones of the gran tic complexes were mapped. The
Lake of Bays Batholith (P.2353) to the north consists,
predominantly, of weakly foliated biotite trondhjemite. The Basket
Lake Batholith (Map l 1 .2350) and adjacent granitic rocks to the
east, that comprise the marginal phases of the southern complex,
consist ol well-foliated biotite granodiorite and clotty hornblende
biotite (quartz) diorite respectively. A hybrid zone in the eastern
part of the area consists of inegular patches of gabbro, diorite,
variable lo leucocratic diorite and quartz diorite, developed
within the marginal ?one of the volcanosedimentary belt.
The volcanosedimentary belt is internally intruded by several
granitoid intrusions.
The Shanty Lake and Northeast Bay Plutons (Maps P.2354 and
P.2351 respectively l are both predominantly biotite trondhjemite m
composition. The Northeast Bay Pluton has a diorite margin Both
these bodies may be of subvolcanic affinity.
The Smock Lake Pluton (Map P.2352) may be a zoned, mafic or
ultramafic to monzonite to leucocratic quarts monzonite, intrusion.
The Wyatt Lake Pluton (Map P. - 2353) is of
trondhjemite-granodiorite composition. The Towers Lake intrusions
(Map P.2353) are of similai composition to and may join at depth
with the Lake of Bays Batholith.
STRUCTURAL GEOLOGY
A regional, axial plane, foliation roughly parallels the general
east-west trend of the lithologic units. Top deter minations are
few and far between in the mafic meta- volcanics but those measured
indicate they have been folded about general east-west trending
axes, fight buckle foldinrj, likely dup to regional north-south
compression, is especially noticeable in the mafic metavolcanics in
the north-central part of the area. Extensive fjattening accom
panied the folding as evidenced by pillows having length to width
ratios of 30 to 1, Conjugate kink faults showing small lateral
displacements accompany the development of these buckle folds, Top
deternvnations by graded bedding m the Minnitaki Group
melaseuiments indicate tight isoclinal folding.
Contacts between major lithologic units such as the Neepawa
Gioup, Minnitaki Group and southern volcano- sedimentary sequences
are interpreted now to bo fault controlled. A zone of brittle
fracture extends from The western outlet of the English River
eastwards to Smock Lake. Refolding within this zone sugcjest that
it may be an early fault structure developed parallel to
stratigraphy that was subsequently reactivated by later east-west,
predominantly dexiral, faulting.
Late fractures have a general north-south trend. Such a late
structure is interpreted to extend through Southeast Bay of
Minnitaki Lake.
ECONOMIC GEOLOGY
Several gold occurrences on Neepawa Island occur in sheared and
carbonated mafic metavolcanics cluse to the contact with the
Minnitaki Group Metasediments (John ston 19721. On Burnthut Island
gold occurrences are associated with felsic metavolcanic quart?
porphyry (intrusions) and mafic metavolcanics (Johnston 19721.
Copper and molybdenum occur in a brecciated phase of the
Northeast Bey Pluton (Johnston 1972) and in quart/ veins that cut,
the Shanty Lake Pluton (Trowell 1970).
Diamond drill hole information Resident Geologist's Files,
Ontario Ministry of Natural Resources, Sioux Lookout) indicates
several occurrences of mineralization. Pyrite and pyrrhotite, trace
chalcopyrite and trace sphal erite occur in interflow intermediate
tuffs and meta sediments (both clastic and chemical) within the
mafic metavolcanic sequences.
Disseminated copper mineralization is also reported (Resident
Geologist's Files, Ontario Ministry of Natural Resources) in the
Pike Lake Pluton.
The author believes that the intermediate to felsic frag mental
sequence in Southeast Bay should be examined for potential
base-metal mineralization. The ultramafic intrusive rocks should be
examined for possible copper- nickel and platinoid group elements
mineralization,
GEOCHEMICAL SAMPLING
Samples taken by the field party for chemical analysis by the
Geoscience Laboratory, Ontario Geological Survey
are located on the map tace. These are m two series designated
by prefixes 11 and 78 followed by a four digit number. Samples
designated by the prefix H we 1 1: collected by Hiscott (19741 for
whole rock analysis.
REFERENCES
Hiscott, R.N.1974: A Petrochemical and Petrological
investigation of
an Archean Volcanic Sequence, Superior Province Canada;
unpublished B.Se. Thesis, Brock University St. Catherines, Ontario,
75 p.
Johnston, F ,J.1972: Geology of the VcrmiMon-Abiair. Lakes
Area,
District of Kenora, Ontario Division of Mines, GR 101, 56p.
Accompanied by maps 2242 and 2243, scale 1:31 680.
Trowell, N.F.1970: Geology of the Watcomb Area, District of
Kenora;
Ontario Department of Mines and Northern Affairs, GR 88, 28p.
Accompanied by map 2209, scale 1:31 680.
LIST OF PROPERTIES AND OCCURRENCES
FOR MAPS
P.2350 to P 23G4
1) Alkennre-Butfalo Gold Mines Lid. [1937 .
2) Asaico Exploration Company of Canada Limited
3)4]
5)
G)7)
B]
9)10)1 1)
12)
13)
14)
15)
16)
17)
18)
19)20)
21 )
Boylen, F. A. [1971|.Central Manitoba Option (Cenbal iVlanttoba
MinesLimned),Chimo Gold Mines Limited | 1970|.
Colleen Coppei Mines Limited 1 1965|
ColUTi-Dale Claims [1934|.
Combined Metal Mines Limited | 1973|.Confcho Mines Limited 1
1951 ].
Congress Mining Corporation Limited | 1971 j.
Consolidated Doisan Mines Limited 1971 1.
Courier Explorations Limited 1 1971 .
Dave Lake M.nes Limited 1971 1.
Delmte Mines Limited.
Denison Mines Limited [1972 .
Denison Mines L : rmted - GoldraV Mines Limited[19731-
Dome Exploration Limited 1972|.
East Bay Gold Limited [1971].
Falcon Lake Mining Corporation Ltd. 1971).
Gaspe Quebec Mines Limited [1971
Geophysical Engineering L i mi ted.
22) Goldray Mines Limited [1970
23) Hanson Mines Limited (Hanson Mining Company Limited)
[1972J.
24) Martland Mines Limited 1972|.25) Imperial Oil Enterprises
Limited j 19701-
26) John Sykfis Mining and Milling Company Limited.
27) Keevil Mining Group Limited 11965|
28) Kelore Mines Limited (New Ketore Mines Limited) [1951 .
29) Kostiuk, M. l 1971 |.30) Levesque, R. and Carrie, J. [ 197Q
.
31) MacDonald, J.L.
32) Massval Mines Limited 11970|.
33) Mattagami Lake Mines Limited,34) McCombe Group
(Wrirjht-Hargteave^ Mines Limited)
[1951 .35) McCumbe Mining and Exploration Ltd. Option
[1958],36) Mid-North Engineering Services Limited-Amalgama
ted Rare Earth Mines Limited [ 1970].
37! Mid-Patapedia Mines Limited [ 1969|.
38) Minnitaki Iron Range Limited.
39) Neepawa Island Gold Mines Limited 1950].
40) New Calumet Mines Limited [1970|. 411 New Calumet Mines
Limited - Zenmac Metal Mines
Limited [1971 .
42) New High Malartic Gold Mines Lini'ted [195143) Noranda
Exploration Company Limited [1971
44) Our gold Mining Company Limited 11962 .
45) Paymaster-Gillies Property [19511.
46) Reeta Explorations Limited.
47) Rio Tinto Canadian Exploration Limited [1961],
48) Scurry Rainbow Oil Limited [1971 .
49) Selco Exploration Company Limited [19711.
50) Shilo Mines Limited 1972|.
51) Silver-Wilier Mines Limited - New Davies Petroleums Limited
[1972].
52) Steep Rock iron Mines Limited [1976].
53) Sturgeon King Mining Corporation Limited [1971 j.
54) Whalen Deposit [1971|.
Properties are shown where exploration information is on file at
the Assessment Tiles Research Off ice Ontario Geolo gical Survey,
Toronto and/or Resident Geologist's Files, Sioux Lookout. A date m
square brackets indicates last year of exploration activity.
Patented mining claims are shown but not identified as to present
holder. Information current to August 31, 1978.
SYMBOLS
n
Ootrench
trenches
Tost pit.
Exploration trenching.
Glacial striae
Small bedrock outcrop.
Aroa of bedrock outcrop.
Bedding, top unknown; l inclined, vei 11 ea t unknown).
Bedding, top (arrow) from grain gradation; (inclined, vertical,
overturned).
Beddiny, top (arrow! from iclat'onship of cleavage and bedding;
(inclined overturned].
Lava flow; top (arrow) from pillows shape and packing.
Schistosity; (horizontal, inclined, vertical).
Indicates patented claim, some islands in Minnitaki Lake do not
have numbers.
Lineation with plunge.
Geological boundary, observed.
Geological boundary, position interpreted.
Geological boundary, deduced from geo physics.
Fault; (observed, assumed) Spot indicates downthrow side, arrows
indicate hori?ontal movement.
Drag folds with plunge.
Drill hole; (vertical, inclined), overburden
Shaft; depth in feet,
Magnet.c attraction.
Kink foid.
ineral occurrence.
Colour boundary previously mapped area,
Sample location
Township boundary.
Foliation; (horizontal, inclined, vertical). Dip not known.
Indicates pattented claim; some islands in Minnitaki Lake do not
have numbers.
METAL AND MINERAL ABBREVIATIONSFor Maps P.2350 to P.2354
asp . . . . . . . . . . . . . . . . - Arsenopyrite
Au . . , , . . . . . . . . . . . . . . . . . . Gold
cp. . . . . . . . . . . . . . . . - . Chalcopyrite
Cu . . , , . . . . . . . . . . . . , , . . .Copper
yf. . . . . . . . . . . . . . . . , . . . .Graphite
tjL. . . , . . . . . . . , . . . . . . . . . . Garnet
fu . . . , . . . . . . , . . . . . , . . . . Fuchsite
mag . . . . . . . . . . . . . . . , . . Magnetite
Mo . . . . . . . . . . , . . . . . .Molybdenum
ov. . . . . . . . . . . . . . . . . . . . . . Olivine
py . . . . . . . . . . . . . . . . . . . . . .Pyrite
po . . . . . . . . . . . . . . . . . . Pyrrliotiti;
S . . . . . . . . . . .Sulphide mineralization
serp . . . , . . . . . . . . . . . . . Serpentine
sp. , . . . . . . . . . . . . . . . . . . Sphalerite
if) . . . . . . . . . . . . . . . . . . . . .Ttace
Zn , . . . . . . . . . , . . . . . . . , . . . .Zinc
SOURCES OF INFORMATION
Geolorjy by N.F. Trowell, J.R. Bortlett, and R.H, Sutcliffe and
assistants, 1977, 1978.
Geology is not tied to surveyed lines.
Base-maps derived from the Forest Resources Inventory, Lands and
Waters Group, Ontario Ministry of Natural Resources plus changes by
the authors and assistants.
Sioux Lookout Aiea; Ontario Department of Mines Map 41h, M.E.
Hurst 1932. Scale 1 inch to T/a miles 1:95040.
Superioi Junction - Sturgeon Lake Area; Onta*io Depart ment of
Mines Map 46d, H.C. Horwood, 1937. Scale 1:126 720 flinch lo 2
miles).
Sioux Lookout, Geological Survey of Canada Map 14-1968, Scale
1:253440 R. Skinner.
Western Minnitaki Lake Area; Ontario Department of Mines Map
2155, F.J, Johnston. 1968, Scale 1:31 680 (1-inch to Vb mile).
Watcomb Area; Ontario Department ol Mines Map 2209, N.F. Trowell
1970, Scale 1:31 680 Uinch to K mile).
ODM-GSC Aeromagnetic Maps 1127G, 11 37G and 1138G Scale 1 :63
360 (1 inch to 1 mile).
Information on file at Resident Geologists Of^ce Ministry of
Natural Resources Sioux Lookout and Assessment Files Research
Officr Ontario Geological Survey, Toronto.
Maps, Plans and Files of Mining Companies.
Magnetic declination 3 E, 1978.
Metric conversion factoi 1 foot = 0.3048 m.
Every pussiu/t! ettori has been made ro ensure the accumcy of
rhp information pr&scnteti on (his mnp; homfivpi. the Ontario
Ministry ui Natural Resources does not assume any liability fO'
errois that may occur. Users ma/ tw.sft tn vett.fy C'ldcal
information; sources include Ijv'li thu rt.-ft;fences /'Jfetf here,
and information on file at the Resident or Regional Geologist's
oft/cu and The M/n/ng Re corder's office nearest the mao area.
This map is publisher! with the* permission of E.G Pye,
director. Ontario Guo'ogtcal Survey,
Issued 1980
Information from this publication may be quoted if rjredit is
given. It is recommended that reference to this map be made in the
following form:
Trowell, N.F., Bartlett, J,R. and Sutcliffe R.H.1980: Flying
Loon Lake Area, Wyatt Lake Sheet, District
of Kenora, Ontario Geological Survey Prelim. Map P.2353,
Geological Ser., Scale 1:15 840. Geology 1977, 1978.
