Ministry of Energy, Northern Development and Mines
Permanent Link to this Record: MDI000000002359| Deposit Name(s) | Cote - Archie Lake - 1999 |
|---|---|
| Deposit Status | occurrence |
| Date Created | 2019-Nov-01 |
| Date Last Modified | 2019-Nov-04 |
| Created By | T Pettigrew |
| Revised By | T Pettigrew |
Primary Commodities: gold
Township or Area: Summers
Latitude: 49° 38' 50.97" Longitude: -87° 58' 31.18"
UTM Zone: 16 Easting: 429592 Northing: 5499895 UTM Datum: NAD83
Resident Geologist District: Thunder Bay North
NTS Grid: 42E12NW
Point Location Description: Trench 4 from Assessment report 20000001031
Location Method: data compilation
1984: Jedi Resources Ltd. conducted soil sampling and an EM survey. 1999-2000: R. and R. Cote carried out prospecting, mapping, and sampling. 2001-02: R. and R. Cote carried out prospecting, stripping, trenching, and mapping. 2004-5: Alto Ventures optioned the property from R. and R. Cote, carried out trenching, sampling, and drilled 2 DDH totaling 181 m. 2007: Kodiak Exploration Ltd. optioned the property and carried out sampling. 2008: Kodiak drilled 12 DDH totaling 1968 m.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 2.35687 | 20000002696 | Open |
| 2.39210 | 20000003495 | Open |
| 2.29105 | 42E12NW2024 | Open |
| 2.7649 | 42E12SW0072 | Open |
| 2.34044 | 20000002683 | Open |
| 2.31351 | 20000001031 | Open |
| 2.20878 | 42E12NW2014 | Open |
| 2.24846 | 42E12NW2019 | Open |
Province: Superior
Subprovince: Wabigoon
Belt: Beardmore-geraldton
Geological Age: Archean
11/04/2019 (T Pettigrew) - The Cote–Archie Lake property is located within the west-central portion of the main, east-trending Beardmore-Geraldton metavolcanic-metasedimentary belt, which is part of the southern margin of the Wabigoon Subprovince. The Cote–Archie Lake claims lie in the central metavolcanic sub-belt; their geology was described by Hart et al. (2002) as consisting of intermediate massive and pillowed flows with significant tuffs, lapilli tuffs and tuff breccias, and minor interflow chert-magnetite iron formation. Structurally, the property is bounded along the south by the Standingstone fault, which is described by Hart et al. (2002) as the western extension of the Oxaline Lake–Watson Lake fault and as part of the ductile-brittle shear system on which the Leitch and Sand River mines are situated. The fault is manifested by the development of numerous small, northeast-striking carbonate shear zones (Hart et al. 2002). Approximately 1 km north of the property, tracing parallel to the southern Standingstone fault, is the Sandy Creek fault. Hart et al. (2002) indicated that surface expressions of the fault included numerous, discontinuous shear zones, with associated carbonate and chloritic alteration (Mason et al., 2003).
| Rock Type | Rank | Composition | Texture | Relationship |
|---|---|---|---|---|
| vein | 1 | quartz-carbonate | host | |
| intermediate metavolcanics | 2 | sheared | host |
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Habit Description |
|---|---|---|---|---|---|---|---|
| 1 | pyrite | economic | ore | ||||
| 2 | arsenopyrite | economic | ore | ||||
| 3 | chalcopyrite | economic | ore |
11/04/2019 (T Pettigrew) - The Cote-Archie Lake occurrence, as observed by staff of the Thunder Bay North Resident Geologist office during an October 2002 visit, is an altered, mineralized zone approximately 15 m by 25 m in size, situated along a north-facing hill. The exposure consists of an iron carbonate-altered (ankerite), quartz-flooded, intermediate metavolcanic rock. Mineralized zones contain between 2 to 30% very fine-grained arsenopyrite and coarser, subhedral pyrite in sheared and brecciated metavolcanic rocks. Assays of grab samples collected by Resident Geologist’s staff ranged from 0.02 to 0.79 ounces of gold per ton (Resident Geologist’s Files, Thunder Bay North District, Thunder Bay). The zone strikes 070° (Mason et al., 2003). The best results from Alto Venture's work on Cote-Archie Lake were associated with arsenopyrite in brecciated and nonbrecciated quartz carbonate veins in trench 3 (11.4 g/t Au), trench 4 (17.35 g/t Au), and trench 6 (10.22 g/t Au) (Assessment report 42E12NW2024). The mineralization found in the drill core is concentrated within hydrothermal breccia units. These breccias generally held a high percentage of pyrite, often occurring as veinlets on the margins of the breccias, and occasionally arsenopyrite and chalcopyrite. The best result from the 2008 drill program was from DDH CA08-6A from 84.2-84.5 m which returned 3.48 g/t Au (Assessment report 20000003495). DDH COT07-01 returned up to 1.35 g/t Au over 2.4 m from a quartz vein (Assessment report 20000002696).
| Rank | Classification |
|---|---|
| 1 | lode (gold) |
| 1 | vein |
| Rank | Characteristic |
|---|---|
| 1 | sheared |
| 1 | vein |
Publication - Report of Activities, 2002, Resident Geologist Program, Thunder Bay North District, p. 15-16
Publication Number: OFR6111 Date: 2003
Author: Mason, J.K., White, G.D., O’Brien, M.S. and Komar, C.
Publisher Name: OGS
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