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Ontario Geological Survey
Permanent Link to this Record:
MDI42C01NW00052
| Record Name(s) | Arc Zone - 1991, Arc North Gold Prospect - 1998 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 2001-Apr-30 |
| Date Last Modified | 2022-Sep-07 |
| Created By | |
| Revised By |
Primary Commodities: Gold
Township or Area: Cowie
Latitude: 48° 11' 7.16" Longitude: -84° 29' 56.63"
UTM Zone: 16 Easting: 685883 Northing: 5339923 UTM Datum: NAD83
Resident Geologist District: Sault Ste. Marie
NTS Grid: 42C01NW
Point Location Description: Stripped areas located north of Lane Lake
Location Method: Based on Assessment
Access Description: The site is accessible from Hawk Junction. Drive north along the Alden Station road (parallel to the ACR tracks) for 11.4 km to where the rail crossing has been taken out. Drive east along the Forge Lake acccess road for approximately 1.5 km and then north along a series of disused forestry access roads.
1989-90: Corona Corporation - prospecting, mapping. 1991-92: Noranda Exploration Co. Ltd. - sampling, till sampling, stripping, mapping, 2 ddh (208 m). 1998: S. Sears : prospecting, stripping, soil sampling.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| WP ABOTOSS.25 | ||
| WP ABOTOSS.26 | ||
| WP Corbiere-14 | 42C06SE0002 | 42C06SE0002 |
| WP COWIE.4 |
Province: Superior
Subprovince: Wawa
Terrane: Wawa-Abitibi
Belt: Michipicoten
Geological Age: Archean
Metamorphism Type: Regional
Metamorphism Grade: Greenschist
Dec 06, 2011 (A Wilson) - The Arc Zone is situated near the north limit of the Forge Lake Deformation Zone within a discrete shear structure. A section of intense ductile shearing follows along the north half of the Finger Lake sedimentary unit. The ductile nature of shearing may extend for 25-150 m into the mafic volcanic-gabbro sequence to the north. This gives way to a brittle-fracture style of deformation with the quartz-ankerite-pyrrhotite-arsenopyrite gold zones occurring along narrow shears and extensional fractures.
| Rock Type | Rank | Composition | Texture | Relationship | Quartz-Feldspar Porphyry | 1 | Quartz-Feldspar | Near |
|---|---|---|---|---|
| Schist-Unsubdivided | 2 | Chlorite | Host | |
| Vein | 3 | Quartz | Host |
Dec 07, 2005 (A Wilson) - The occurrence consists of highly ankeritized chlorite schists hosting up to 1.5 m wide quartz veins at the margin of a small quartz-feldspar porphyry intrusion. Both the wall rock and quartz veins are sulphidized with the wall rock containing pyrite.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Chalcopyrite | Economic | Gangue | ||||
| 2 | Galena | Economic | Gangue | ||||
| 3 | Arsenopyrite | Economic | Gangue | ||||
| Ankerite | Alteration | Carbonatization | 1 | Medium | Replacement |
Dec 06, 2011 (A Wilson) - Channel samples returned values ranging up to 6.1 g/ Au over 4 m. The higher grade gold mineralization with values up to 11.6 g/t Au over 1 m is hosted within the wall rock where the schist exhibits a higher degree of silicification. Gold assays from the veins range from 0.5 g/t Au to 2.0 g/t Au. Diamond drilling completed by Noranda intersected 0.45 g/t Au over 2.1 m and 0.9 g/t Au over 1.5 m. Samples collected by Sears et al. in 1998 returned values up to 3.47 g/t Au.
| Rank | Characteristic |
|---|---|
| 1 | Sheared |
| 2 | Vein |
| Shape | Length | Thickness | Depth | Strike | Dip | Plunge | Trend | Age | Reference |
|---|---|---|---|---|---|---|---|---|---|
| Regular | 230 | 10 | 90 |
File - Resident Geologist files WP Abotossaway.25, WP Abotossaway.26, WP Cowie.4
Publication Number: Date:
Author:
Publisher Name:
Location: SSM RGP office
Map - Geological compilation series, Wawa sheet, districts of Algoma and Sudbury
Publication Number: P0640 Scale: 1:126,720 Date: 1997
Author: Leahy E.J., Rupert R.J., Giblin P.E., Giguere J.F.
Publisher Name: Ontario Dept. of Mines and Northern Affairs
Location:
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For detailed information regarding this mineral record please contact the Sault Ste. Marie Resident Geologist District Office