Ontario Geological Survey
Permanent Link to this Record:
MDI42C02NE00141
| Record Name(s) | Big Lake Main Zone - 1992 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 2005-Jan-24 |
| Date Last Modified | 2022-Sep-07 |
| Created By | |
| Revised By |
Primary Commodities: Gold
Township or Area: Corbiere
Latitude: 48° 10' 55.1" Longitude: -84° 37' 37.46"
UTM Zone: 16 Easting: 676380.8 Northing: 5339248.6 UTM Datum: NAD83
Resident Geologist District: Sault Ste. Marie
NTS Grid: 42C02NE
Point Location Description: Grab sample on north shore of Big Lake
Location Method: Based on Assessment
Access Description: The site is most easily accessible by air from Wawa.
1991-92: Hemlo Gold Mines Ltd. - till sampling, ground geophysics, sampling, mapping. 2003-04: Band-Ore Resources Ltd. - sampling, prospecting, mapping, soil geochemistry, airborne geophysics, 3 ddh.
Province: Superior
Subprovince: Wawa
Terrane: Wawa-Abitibi
Belt: Michipicoten
Geological Age: Neoarchean Geochronological Age: 2.75 GA
Dec 07, 2005 (A Wilson) - The Key Lake Deformation Zone hosts a series of intense zones of shearing that mainly occur as topographic lows Zones of intense shearing mainly occur along lithologic contacts. Foliation strikes in a northwesterly direction and dips steeply to the north.
| Rock Type | Rank | Composition | Texture | Relationship | Quartz-Feldspar Porphyry | 1 | Quartz-Feldspar | Host |
|---|---|---|---|---|
| Intermediate Tuff | 2 | Felsic To Intermediate | Tuff, Lapilli Tuff, Crystal Tuff | Near |
| Mafic lava flow-unsubdivided | 3 | Intermediate To Mafic | Massive, Pillowed | Near |
| Vein | 4 | Quartz | Host |
Dec 07, 2005 (A Wilson) - Felsic metavolcanic rocks consisting of tuffs, lapilli tuffs and crystal tuffs form a major lithologic unit northwest of Big Lake. Within this area intermediate to mafic metavolcanic rocks are represented by massive to pillowed units striking WNW. At Big Lake is a felsic hypabyssal intrusion. This intrusion may be the cogenetic equivalen of the flesic volcanics that occur west and northwest of the intrusion. The porphyry has undergone a cataclastic style of deformation with local discrete zones of intense deformation.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Pyrite | Economic | Gangue |
Dec 07, 2005 (A Wilson) - Channel samples collected by Hemlo from the area returned values up to 4.6 g/t Au over 1 m or 1.3 g/t Au over 10.0 m in a zone that is open at both ends. The best assays from the Band-Ore drilling returned values up to 3.7 g/t Au over 4.5 m.
File - Resident Geologist files WP Abotossaway.25, WP Abotossaway.26
Publication Number: Date:
Author:
Publisher Name:
Location: SSM RGP
Map - Geological series, Precambrian geology, Corbiere Township, Algoma District
Publication Number: P2607 Scale: 1:15,840 Date: 1984
Author: Sage R.P., Calvert T., Epstein R., England D., Koscinsko K., Worona R., Oudkerk G., Inasi J., Lockwood M.B., Thomas D.
Publisher Name: Ontario Geological Survey
Location:
Publication - Summary Report on the Corbiere Property for Band-Ore Resources
Publication Number: NI 43-101 Date: 2004
Author: Cavey, G.
Publisher Name:
Location: Timmins RGP
Map - Precambrian Geology Compilation Series - White River Sheet
Publication Number: M2666 Scale: 1:250,000 Date: 2001
Author: Santaguida F.
Publisher Name: Ontario Geological Survey
Location:
MonoMap - Geology of Abotossaway, Corbiere, Leclaire and Musquash Townships and Part of Dunphy Township, District of Algoma
Publication Number: OFR5587 Date: 1993
Author: Sage R.P.
Publisher Name: Ontario Geological Survey
Location:
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For detailed information regarding this mineral record please contact the Sault Ste. Marie Resident Geologist District Office