Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI42C13SE00010

Record: MDI42C13SE00010

General

Commodities

Primary Commodities: Gold, Zinc, Silver

Secondary Commodities: Copper, Platinum Metals, Nickel

Location

Township or Area: White Lake Area

Latitude: 48° 47' 33.59"    Longitude: -85° 41' 54.19"

UTM Zone: 16    Easting: 595596.84   Northing: 5405224.52    UTM Datum: NAD83

Resident Geologist District: Thunder Bay South

NTS Grid: 42C13SE

Point Location Description: Several small trenches, pits and stripped areas.

Location Method: Field Visit

Access Description: The occurrence is accessible via motor vehicle followed by travel in boat and then on foot. From the intersection of Hwys 614 and 17 proceed east along Hwy 17 for approximately 17 km to an unnamed gravel road that leads north to a public boat launch on the west shore of White Lake. Proceed northerly, via boat, along the west side of White Lake for approximately 9 km to the entrance of Spruce Bay. Proceed westerly for approximately 3 km to the west shore of Spruce Bay where a well maintained, blazed trail leads directly to the occurrence. Several small trenches, pits and stripped areas are located along the shore of a small unnamed lake at the end of the trail.

Exploration History

1965: Geological mapping; V.G. Milne (OGS). 1977: Line cutting, ground geophysical surveys (MAG, EM) and geological mapping; Noranda Exploration Co.,Ltd. 1978-1979: Regional lake sediment and water geochemical survey; GSC-MNR. Samples collected from the vicinity of the occurrence contained slightly anomalous amounts of Au. 1983: Airborne geophysical survey (HLEM, VLF-EM, MAG); Aerodat Ltd. working on behalf of Sunexco Energy Corp. 1984: Geological mapping; G.M. Siragusa (OGS). Siragusa noted the presence of gossanous rock in the vicinity of the occurrence. 1990: Prospecting, trenching (8 separate trenches in 4 areas) and sampling: prospectors D. Carroll and G. Carroll. Geological mapping and lithogeochemical sampling; E.A. Gallo working on behalf of the Carroll brothers. 1993: The occurrence was examined by D.B. McKay (OGS). 1996: Homestake Canada acquired the property. 1997: Homestake carried out mapping and sampling. 2009: B. Fowler conducted magnetic and VLF-EM surveys, prospecting, and sampling.

Assessment Work on File

Geology

Province: Superior

Subprovince: Wawa

Terrane: Wawa-Abitibi

Belt: Schreiber-Hemlo

Geological Age: Archean  

Metamorphism Type: Regional

Metamorphism Grade: Amphibolite

Geology Comments

Dec 07, 2005 (D McKay) - The occurrence is underlain primarily by a southeasterly-trending sequence of mafic metavolcanic and clastic metasedimentary rocks which comprise a portion of the north limb of the Schreiber-Hemlo greenstone belt. These rocks are locally strongly foliated (100 degrees/80 degrees S) and mineral assemblages indicate they have experienced lower amphibolite facies-grade regional metamorphism. In the vicinity of the occurrence, the supracrustal sequence is approximately 3.2 km wide and is bounded to the north and south by granodioritic rocks of the Dotted Lake Batholith and to the west by granodioritic rocks of the Musher Lake Pluton. The metavolcanic and metasedimentary rocks in the vicinity of the occurrence have been intruded locally by narrow felsic dikes, aplitic stringers and diabase dikes. The White Lake Fault, a regional-scale northeast-trending structure, is located approximately 1.5 km to the east. The occurrence is hosted by metagreywacke interbedded with minor amounts of meta-arkose.

Lithology

Lithology Comments

Dec 07, 2005 (D McKay) - The metasediments consist mainly of Metagreywacke with minor interbedded meta-arkose. A graphitic shear zone 0.5 m wide is present in the meta-arkose at the east end of the rusty zone. Felsite dikes up to 0.5 m in width, and aplite stringers up to 15 cm wide cut randomly through the metasediments. Numerous irregular aplite threads and stringers form a stockwork zone in and around some of the trenches.

Mineralization

Mineralization Comments

Dec 07, 2005 (D McKay) - The pyrite mineralization appears to occur across an area 80 m long and 50 m wide, although outcrop exposure is sparse. Pyrite content averages about 2%, with local concentrations of up to 10%. Up to 5% pyrrhotite and 2% chalcopyrite may also be present. Grab samples collected from the occurrence by E. Gallo in 1990 returned assay values of up to 6850 ppm Au, 79 ppm Ag, 5400 ppm Zn, 960 ppm Cu, 680 ppm Ni, 11 ppb Pt and 8 ppb Pd.

Mar 13, 2019 (Therese Pettigrew) - Carroll North assayed up to 0.637% Zn and 0.745 ppm Au from a pyritic metasediment. Carroll South assayed up to 6.85 ppm Au, 0.54% Zn, and 79 ppm Ag from folded, locally sheared mafic to ultramafic flows and interflow wacke (Muir, 2000).

Mineral Record Details

References

Map - Geophysical Series, White Lake, Thunder Bay District, Ontario

Publication Number: Map 2168G Scale: 1:63,360    Date: 1963

Author: Geological Survey of Canada

Publisher Name: Geological Survey of Canada

Location: https://doi.org/10.4095/116493

MonoMap - Geology of the Black River area, District of Thunder Bay

Publication Number: R072 Date: 1968

Author: Milne V.G.

Publisher Name: Ontario Dept. of Mines

Location:

Publication - National geochemical reconnaissance release NGR 35-1978, regional lake sediment and water geochemical reconnaissance data, Ontario eastern shore, Lake Superior; Geological Survey of Canada, Open File 555

Publication Number: GSC OF 555 Date: 1979

Author: Hornbrook, E H W; Coker, W B; Lynch, J J

Publisher Name: Geological Survey of Canada

Location: https://doi.org/10.4095/129524

Map - White Lake sheet, Thunder Bay District

Publication Number: M2147 Scale: 1:31,680    Date: 1968

Author: Milne V.G.

Publisher Name: Ontario Dept. of Mines

Location:

Mono - Mineral Occurrences in the Manitouwadge Area, Volumes 1, 2 and 3

Publication Number: OFR5906 Page: 55-60  Date: 1994

Author: McKay D.B.

Publisher Name: Ontario Geological Survey

Location:

Publication - Regional Lake Sediment and Water Geochemical Reconnaissance Data, northwestern Ontario, [NTS 42C and 42F South]; Geological Survey of Canada, Open File 236

Publication Number: GSC OF 2362 Date: 1991

Author: Friske, P W B; Hornbrook, E H W; Lynch, J J; McCurdy, M; Gross, H; Galletta, A C; Durham, C C

Publisher Name: Geological Survey of Canada

Location: https://doi.org/10.4095/132202

File - Schreiber-Hemlo Resident Geologist Mineral Deposit Files

Publication Number: Min Dep Date:

Author:

Publisher Name:

Location: Thunder Bay RGP

Map - Manitouwadge-Wawa sheet, geological compilation series, Algoma, Cochrane, Sudbury and Thunder Bay districts

Publication Number: M2220 Scale: 1:253,440    Date: 1972

Author: Milne V.G., Giblin P.E., Bennett G., Thurston P.C., Wolfe W.J., Giguere J.F., Leahy E.J., Rupert R.J.

Publisher Name: Ontario Division of Mines

Location:

Map - Geological series, Precambrian geology, Lumby Lake area, western part, Kenora District

Publication Number: P2828 Scale: 1:15,840    Date: 1985

Author: Jackson M.C., Chevalier P.

Publisher Name: Ontario Geological Survey

Location:

Map - Geological Compilation of the Eastern Half of the Schreiber-Hemlo Greenstone Belt

Publication Number: M2614 Scale: 1:50,000    Date: 2000

Author: Muir T.L.

Publisher Name: Ontario Geological Survey

Location:

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For detailed information regarding this mineral record please contact the Thunder Bay South Resident Geologist District Office