Ontario Geological Survey
Permanent Link to this Record:
MDI000000000526
| Record Name(s) | Spence Showing - 1997 |
|---|---|
| Related Record Type | |
| Related Record(s) | |
| Record Status | Prospect |
| Date Created | 2008-Mar-19 |
| Date Last Modified | 2022-Jun-07 |
| Created By | |
| Revised By |
Primary Commodities: Gold
Township or Area: Akow Lake Area
Latitude: 52° 46' 45.16" Longitude: -90° 29' 44.85"
UTM Zone: 15 Easting: 668900 Northing: 5850650.005 UTM Datum: NAD83
Resident Geologist District: Thunder Bay North
NTS Grid: 53B16SW
Point Location Description: Assessment file map and ddh database.
Location Method: Data Compilation
1996-1999: Geophysical, geological and geochemical surveys and diamond drilling by Romios Gold Resources Inc.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 2.18659 | 53B16SW2001 | 53B16SW2001 |
| 2.18862 | 53B16SW2003 | 53B16SW2003 |
| 2.18446 | 53B16SW2002 | 53B16SW2002 |
Province: Superior
Subprovince: Berens River
Terrane: North Caribou
Domain: North Caribou Core
Belt: North Caribou
Geological Age: Mesoarchean
| Rock Type | Rank | Composition | Texture | Relationship | Mafic lava flow-unsubdivided | 1 |
|---|---|---|---|---|
| Porphyry-unsubdivided | 2 | |||
| Felsic lava flow-unsubdivided | 3 | |||
| Terrigenous-Clastic-Unsubdivided | 4 | |||
| Gabbro | 5 |
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Pyrite | Economic | Ore | ||||
| 2 | Gold | Economic | Ore | ||||
| 3 | Chalcopyrite | Economic | Ore | ||||
| 4 | Malachite | Economic | Ore |
Mar 19, 2008 (Mark Puumala) - Spence (1997a) indicated that the area of this occurrence is underlain by a series of mafic and felsic tuffs that strike approximately 340 and dip 85 degrees to the east. These rocks form part of the South Rim unit of the mafic metavolcanic rock-dominated McGruer assemblage (Thurston, Osmani and Stone 1991). The original occurrence was reported by Spence (1997a) to be hosted by sheared mafic metavolcanics at the contact with a concordant feldspar porphyry dike. Following a subsequent detailed mapping and stripping program, Spence (1997b) described the mineralized zone as a deformation zone containing a quartz-feldspar porphyry along its axis within a package of greywacke, mafic tuffs and flows, gabbro and amphibolite. Gold mineralization is reported by Spence (1997b) to be concentrated along thin quartz-filled shear zones that are mineralized with chalcopyrite. Visible gold, pyrite, malachite, magnesium bloom and an unidentified grey metallic mineral were also observed in the mineralized zone. The mineralized zone is exposed at surface over a minimum strike length of 60 m and attains a maximum width of approximately 2 m (Spence 1997b). During a 1998 Romios Gold Resources diamond drilling program (Spence 1998), six drill holes (RGRI-98-1 to 4, 6 and 14) advanced to test the gold-mineralized deformation zone intersected anomalous gold mineralization over an approximate strike length of 230 m. Numerous significant assay results were reported from surface sampling of the showing by Spence (1997a and 1997b). The most notable was a grab sample that assayed 68.5 g/t Au. Notable assay values reported from the diamond drilling program included 2.65 g/t Au over 2.7 m in drill hole RGRI-98-4, 1.75 g/t Au over 3.2 m in drill hole RGRI-98-2, and 2.90 g/t Au over 1.0 m in RGRI-98-3 (Spence 1998).
| Rank | Classification |
|---|---|
| 1 | Lode (Gold) |
| Rank | Characteristic |
|---|---|
| 1 | Sheared |
| 2 | Vein |
Article - Northwestern Superior province: review and terrane analysis
Publication Number: SV04-01.005 Date: 1997
Author: Thurston P.C., Osmani I.A., Stone D.
Publisher Name: Ontario Geological Survey
Location:
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