Ontario Geological Survey
Permanent Link to this Record:
MDI42C13SE00011
| Record Name(s) | McKay-Fowler Zn - 1992, Gossan 39 - 1992 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1996-Nov-27 |
| Date Last Modified | 2022-Jun-29 |
| Created By | |
| Revised By |
Primary Commodities: Zinc
Secondary Commodities: Copper, Gold, Molybdenum, Bismuth
Township or Area: White Lake Area
Latitude: 48° 47' 29.69" Longitude: -85° 40' 46.54"
UTM Zone: 16 Easting: 596979 Northing: 5405128 UTM Datum: NAD83
Resident Geologist District: Thunder Bay South
NTS Grid: 42C13SE
Point Location Description: Point 138 on OGS map M2614
Location Method: Data Compilation
Access Description: The occurrence is located approximately 38 km southeast of Manitouwadge and 2.75 km northeast of the northeastern tip of Etna Lake. The occurrence is situated on the south shore of the channel connecting Spruce Bay to the main body of White Lake approximately 1.75 km west of Minisdawanga Beach. The occurrence is accessible via motor vehicle followed by travel in boat. From the junction 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 along the south shore of the channel leading into Spruce Bay for approximately 1.75 km to the vicinity of the occurrence. Rusty-weathering, locally altered mafic metavolcanic and metasedimentary rocks are exposed along the lakeshore and along the face of a northerly-trending scarp in the general vicinity of what G. Siragusa (Map P.2738) refers to as Gossan 39.
1964-1965: Geological mapping; ODM (V.G. Milne). 1977: Line cutting, ground geophysical surveys (MAG, CEM, VLF-EM), geological mapping; Noranda Exploration Co., Ltd. 1978-1979: Lake sediment and water geochemical sampling; GSC and 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. 1984: Geological mapping; OGS (G.M. Siragusa). Siragusa noted the presence of gossanous rock in the vicinity of the occurrence. 1992-1993: Showing was discovered. Prospecting, sampling, ground geophysical survey (Beep Mat); prospectors B. Fowler, M. Shuman and M. Daniels. Lithogeochemical sampling; OGS (D.B. Mckay), Minnova Inc., Granges Inc., Homestake Mining Corp. 1994: Line cutting, ground geophysical surveys (MAG, VLF-EM, HLEM, IP); prospectors B. Fowler, M. Shuman and M. Daniels.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 2.15209 | 42C13SE8800 | 42C13SE8800 |
| OP93-331 | 42F13NE2001 | 42F13NE2001 |
| OP93-731 | 42C13SE0074 | 42C13SE0074 |
Province: Superior
Subprovince: Wawa
Terrane: Wawa-Abitibi
Belt: Schreiber-Hemlo
Geological Age: Archean
Metamorphism Type: Regional
Metamorphism Grade: Amphibolite
Dec 07, 2005 (D McKay) - The occurrence is underlain primarily by a southeasterly-trending sequence of mafic metavolcanic rocks which comprise a portion of the north limb of the Schreiber-Hemlo greenstone belt. Thin units of felsic metavolcanic (?) and metasedimentary rocks occur locally within the mafic metavolcanic sequence. The supracrustal rocks in this area are locally strongly foliated (105 degrees/65 degrees SW) and mineral assemblages indicate they have experienced lower amphibolite facies-grade regional metamorphism. In the vicinity of the occurrence, the supracrustal sequence is approximately 3.5 km wide and is bounded to the north and south by granodioritic rocks of the Dotted Lake Batholith. The metavolcanic and metasedimentary rocks in the vicinity of the occurrence have been intruded locally by narrow felsic dikes. A large (60 m wide), north-northeasterly-trending diabase dike is located approximately 300 m west of the occurrence. An elongate (6.5 km long by 300 m wide) body of amphibolitic metagabbro is located approximately 650 m to the north, and the White Lake Fault, a regional-scale northeast-trending structure, is located approximately 600 m to the east. Sulphide mineralization occurs, in varying amounts, in both the mafic metavolcanic and metasedimentary rocks in the vicinity of the occurrence. The occurrence itself consists of a narrow (20 cm wide) silicified and carbonatized (ankerite) zone of sheared mafic metavolcanic rocks which contain locally up to 35% sulphides, primarily pyrrhotite and pyrite. Although the true extent of sulphide mineralization in the area is not yet known, rusty gossans exposed along the face of a small northeast-trending cliff define an erratically mineralized zone at least 50 m in length.
| Rock Type | Rank | Composition | Texture | Relationship | Mafic lava flow-unsubdivided | 1 | Host |
|---|---|---|---|---|
| Siltstone | 2 | Near |
Dec 07, 2005 (D McKay) - The mafic metavolcanic rocks are rusty-weathering, dark green, fine- to medium-grained, moderately foliated, locally silicified, locally strongly magnetic, q-fel-hb schists and gneisses. The metasedimentary rocks are generally rusty-weathering, light creamy-tan to mottled grey-white, very fine- to fine-grained, thinly laminated, moderately foliated bio-q-fel schists.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Sphalerite | Economic | Ore | ||||
| 2 | Chalcopyrite | Economic | Ore | ||||
| 3 | Pyrrhotite | Economic | Ore | ||||
| 4 | Pyrite | Economic | Ore | ||||
| Quartz | Alteration | Silicification | 1 | Unknown | Disseminated | ||
| Ankerite | Alteration | Carbonatization | 2 | Unknown | Disseminated |
Mar 13, 2019 (D McKay) - The sulphide mineralization consists of disseminated grains, thin (1mm wide), foliation-parallel seams and fracture coatings of fine- to medium-grained, anhedral to euhedral pyrite; fine-grained, anhedral pyrrhotite; fine- to medium-grained sphalerite; and rare, fine-grained anhedra and small, anhedral patches of chalcopyrite. The sulphides (primarily pyrrhotite and pyrite) locally constitute up to 35% of the mineralized zone. Grab samples collected from the occurrence by D.B. McKay in 1992 returned assay values that varied from trace to 0.001 ounce Au/ton, nil Ag, 27 to 1476 ppm Cu and 23 to 9700 ppm Zn (McKay, 1994).
| Rank | Classification |
|---|---|
| 1 | Hydrothermal |
| Rank | Characteristic |
|---|---|
| 1 | Disseminated |
| 2 | Sheared |
Book - National Geochemical Reconnaissance Release NGR 35-1978, Regional Lake Sediment and Water Geochemical Reconnaissance Data, Ontario Eastern Shore, Lake Superior
Publication Number: 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 - 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:
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:
Publication - Regional Lake Sediment and Water Geochemical Reconnaissance Data, Northwestern Ontario
Publication Number: GSC OF 2360 Date: 1979
Author: Friske, P.W.B., Hornbrook, E.H.W., Lynch, J.J., McCurdy, M.W., Gross, H.
Publisher Name: Geological Survey of Canada
Location: https://doi.org/10.4095/132379
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:
Mono - Mineral Occurrences in the Manitouwadge Area, Volumes 1, 2 and 3
Publication Number: OFR5906 Page: 70-76 Date: 1994
Author: McKay D.B.
Publisher Name: Ontario Geological Survey
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:
Compend - Report of Activities 1992, Resident Geologists
Publication Number: MP161 Page: 149-151 Date: 1993
Author: Fenwick K.G., Pitts A.E., Newsome J.W.
Publisher Name: Ontario Geological Survey
Location:
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