Ontario Geological Survey
Permanent Link to this Record:
MDI42D10NW00005
| Record Name(s) | E-Zone Occurrence - 1961, Slate Island North Showing - 1897 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1997-Feb-04 |
| Date Last Modified | 2022-Sep-27 |
| Created By | |
| Revised By |
Primary Commodities: Gold
Township or Area: Slate Islands Area
Latitude: 48° 40' 24.7" Longitude: -86° 58' 43.63"
UTM Zone: 16 Easting: 501561.651 Northing: 5391164.788 UTM Datum: NAD83
Resident Geologist District: Thunder Bay South
NTS Grid: 42D10NW
Point Location Description: Two adits, trenches.
Location Method: Other Literature
Access Description: The E-Zone Occurrence is located on the northeast corner of Patterson Island, east of McGreevy Harbour. Access is via water across Lake Superior. A boat launch south of the town of Terrace Bay allows water access to the Slate Islands.
Circa 1897: Prospecting was conducted. Two adits, approximately 120 m apart, were driven 7.5 m and 51 m respectively, reportedly in the William Point area (known as the Patterson (S) occurrence). Mining was reported. 1960: Canadian Aero Service Ltd. conducted airborne EM and mag geophysical surveys for Kimberly-Clark of Canada Limited, in the Horace Cove, St. Mary's Bay area. 1961-62: Trenching, mapping and sampling were conducted for Kimberly-Clark of Canada. L.C. Nichols conducted sampling of 5 gold zones, known as A, B, C, D, and E. 1963: Upper Canada Mines Limited, Junior Frood MInes Limited and Cadamet Mines Limited drilled 6581 feet in the Horace cove area. 1985: The Slate Islands were designated a Provincial Park and withdrawn from staking.
Province: Superior
Subprovince: Wawa
Terrane: Wawa-Abitibi
Belt: Schreiber-Hemlo
Geological Age: Archean
Dec 07, 2005 (B Schnieders) - Schnieders et al., 1996 describes the occurrence as. 'A conjugate , en echelon quartz +/- carbonate vein is present with 7 seperate veins observed. The veins are up to 30 cm wide, however, they average 10 cm in width. The veins strike from 360 degrees to 18 degrees and dip 30 degrees to 58 degrees E, or strike 308 to 320 degrees and dip 70 degrees NE. Another veinstrikes 346 degrees and dips 70 degrees NE. The main vein set strikes 308 to 320 degrees. The veins are generally barren, but are locally mineralized with euhedral pyrite and sphalerite. The veins contain up to 15% carbonate, likely ankerite. Hematitic and chloritic alteration was observed in several veins.
Dec 07, 2005 (B Nelson) - The occurrence is classed as a 'lode gold' deposit. The Slate Islands are underlain by Neoarchean metavolcanic and metasedimentary rocks, which have been intruded by diorite, syenite, gabbro and diabase. Gold-bearing quartz veins occur within sericite-carbonate alteration zones in schist, porphyry and diorite. The quartz veins comprising the D and E zones vary in width, are all less than 100 feet long and cut through tuffs. Shearing is not well devloped here, as it is in other zones. The host rocks are carbonate-rich quartz and feldspar porphyritic rocks, tuffs and a fragmental lapilli tuff. Several volcanic conglomerates and heterolithic breccias are also present in the area. The host rocks are well foliated with the schistosity striking from 34 degrees to 90 degrees and dipping from 60 degrees to 80 degrees south. The host rocks display shearing and kink folds. This structure appears to continue to the west into McGreevy Harbour. A conjugate, en echelon quartz +/- carbonate vein is present with 7 separate veins observed. The veins are up to 30 cm wide. They average 10 cm in width. The veins strike from 360 degrees to 18 degrees and dip 30 degrees to 58 degrees east, or strike 308 degrees to 320 degrees and dip 70 degrees northeast. Another vein strikes 346 degrees and dips 70 degrees northeast. The main vein set strikes 308 degrees to 320 degrees.
| Rock Type | Rank | Composition | Texture | Relationship | Diorite | 1 | Diorite | Host |
|---|---|---|---|---|
| Gabbro | 2 | Gabbro | Near | |
| Diabase | 3 | Diabase | Near | |
| Syenite | 4 | Near | ||
| Vein | 5 | Quartz | Host | |
| Schist-Unsubdivided | 6 | Host | ||
| Porphyry-unsubdivided | 7 | Host | ||
| Conglomerate | 8 | Near |
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Pyrite | Economic | Ore | ||||
| 2 | Sphalerite | Economic | Ore | ||||
| 1 | Quartz | Economic | Gangue | ||||
| Quartz | Alteration | Silicification | 1 | Veins | |||
| Ankerite | Alteration | Carbonatization | 2 | ||||
| Chlorite | Alteration | Chloritic | 3 | ||||
| Hematite | Alteration | Hematization | 4 |
Dec 07, 2005 (B Nelson) - The veins are generally barren, but are locally mineralized with euhedral pyrite and sphalerite. The veins contain up to 15% carbonate, likely ankerite. Grab samples collected by the Schreiber-Hemlo Resident Geologist's Office assayed from nil to 0.13 oz/ton Au.
Dec 07, 2005 (B Nelson) - Hematitic and chloritic alteration was observed in several veins.
Date: Feb 04, 1997
Geologist: B Nelson
Notes: Resident Geologist personnel visited the property July 13, 1995.
Map - Precambrian geology, Slate Islands
Publication Number: M2523 Scale: 1:10,000 Date: 1991
Author: Sage R.P.
Publisher Name: Ontario Geological Survey
Location:
Mono - Mineral Occurrences in the Nipigon-Marathon Area, Volumes 1 and 2.
Publication Number: OFR5951 Date: 1996
Author: Schnieders B.R., Smyk M.C., Speed A.A., McKay D.B.
Publisher Name: Ontario Geological Survey
Location:
Map - Geological series, Slate Islands, District of Thunder Bay
Publication Number: P0997 Scale: 1:15,840 Date: 1975
Author: Sage R.P., Treacher K.W., Meloche D., Bathe D.
Publisher Name: Ontario Division of Mines
Location:
MonoMap - Precambrian geology, Slate islands
Publication Number: R264 Date: 1991
Author: Sage R.P.
Publisher Name: Ontario Geological Survey
Location:
Part - Slate Islands, Lake Superior
Publication Number: ARV27-01.004 Date: 1998
Author: Parsons A.L.
Publisher Name: Ontario Bureau of Mines
Location:
Mono - Geology of the Slate Islands
Publication Number: OFR5435 Date: 1984
Author: Sage R.P.
Publisher Name: Ontario Geological Survey
Location:
Thesis - Gold Occurrences on the Slate Islands of Lake Superior
Publication Number: BSc Thesis Date: 1963
Author: Nichols, L.C.
Publisher Name: Queen's University
Location: Thunder Bay RGP
File - Schreiber-Hemlo Resident Geologist Mineral Deposit Files, Thunder Bay office
Publication Number: Min Dep Date:
Author:
Publisher Name:
Location: Thunder Bay RGP
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