Ontario Geological Survey
Permanent Link to this Record:
MDI000000000525
| Record Name(s) | Bishop Showing - 1996 |
|---|---|
| Related Record Type | |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 2008-Mar-19 |
| Date Last Modified | 2022-Jun-07 |
| Created By | |
| Revised By |
Primary Commodities: Gold
Secondary Commodities: Copper
Township or Area: Akow Lake Area
Latitude: 52° 46' 7.53" Longitude: -90° 29' 25.66"
UTM Zone: 15 Easting: 669299.999 Northing: 5849500.002 UTM Datum: NAD83
Resident Geologist District: Thunder Bay North
NTS Grid: 53B16SW
Point Location Description: Assessment file map.
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 |
|---|---|---|
| 2.18862 | 53B16SW2003 | 53B16SW2003 |
| 2.16867 | 53B16SW0008 | 53B16SW0008 |
Province: Superior
Subprovince: Berens River
Terrane: North Caribou
Domain: North Caribou Core
Belt: North Caribou
Geological Age: Mesoarchean
| Rock Type | Rank | Composition | Texture | Relationship | Ironstone-unsubdivided | 1 | Host |
|---|---|---|---|---|
| Mafic lava flow-unsubdivided | 2 | Adjacent | ||
| Felsic Tuff | 3 | Tuff | Near |
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Pyrite | Economic | Ore | ||||
| 2 | Chalcopyrite | Economic | Ore | ||||
| 3 | Pyrrhotite | Economic | Ore | ||||
| 4 | Bornite | Economic | Ore |
Mar 19, 2008 (Mark Puumala) - Bishop (1996) indicated that the rocks in the vicinity of this occurrence are comprised largely of fine- to medium-grained mafic metavolcanic flows with local intercalated iron formation (part of the South Rim unit of the McGruer assemblage). Following a detailed mapping program carried out in the vicinity of the occurrence, Spence (1997a) also mapped minor discontinuous layers of felsic metavolcanic tuff. Spence (1997a) reported that stratigraphy and foliation in the area strikes approximately 340 with steep easterly dip. Markedly sheared mafic tuff units were also reported by Spence (1997a) to occur within the mafic metavolcanic sequence. Three sets of quartz veins were noted in the mafic metavolcanics by Spence (1997a). These included foliation-parallel quartz carbonate veins that may or may not contain chalcopyrite and pyrrhotite, wide (up to 1 m wide) ¿blow-outs¿ of barren quartz, and tourmaline-mineralized quartz veins that fill 080-striking tension gashes in massive flows. All anomalous gold assays in the area of this showing have been obtained from a narrow deformed iron formation horizon, with no significant results obtained from the quartz veins (Spence 1997a). The most significant assay values (1366 ppb Au and 1323 ppm Cu) were obtained from oxide facies iron formation mineralized with 10% pyrite and trace chalcopyrite and bornite (Bishop 1996). Romios Gold Resources diamond drill hole RGRI-98-15, which was drilled approximately 200 m south of the surface showing to test an electromagnetic conductor, was reported by Spence (1998) to have encountered anomalous gold mineralization in two intervals. These included a 0.6 m section (54.0 to 54.6 m) of mafic metavolcanics with coarse biotite, quartz veining and 2 to 5 cm wide layers of massive pyrrhotite that assayed 544 ppb Au, and a 1 m (75.9 to 76.9) section of fractured metavolcanics (or possibly sediment) with chalcopyrite and pyrrhotite fracture-filling mineralization that assayed 1252 ppb Au.
| Rank | Classification |
|---|---|
| 1 | Lode (Gold) |
| Rank | Characteristic |
|---|---|
| 1 | Stratabound |
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