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Ontario Geological Survey
Permanent Link to this Record:
MDI000000000505
| Record Name(s) | DDH Fo88-9 - 1988 |
|---|---|
| Related Record Type | |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 2008-Mar-13 |
| Date Last Modified | 2022-Jun-07 |
| Created By | |
| Revised By |
Primary Commodities: Gold
Township or Area: Forester Lake Area
Latitude: 52° 28' 44.62" Longitude: -90° 1' 10.1"
UTM Zone: 15 Easting: 702399.997 Northing: 5818499.999 UTM Datum: NAD83
Resident Geologist District: Thunder Bay North
NTS Grid: 53B08NE
Point Location Description: ddh database and assessment file map (Hall 1988).
Location Method: Data Compilation
1987-88: Geological and geophysical surveys and diamond drilling by Esso Minerals of Canada.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 2.12011 | 53B08NE0001 | 53B08NE0001 |
Province: Superior
Subprovince: Berens River
Terrane: North Caribou
Domain: North Caribou Core
Belt: North Caribou
Geological Age: Mesoarchean
| Rock Type | Rank | Composition | Texture | Relationship | Schist-Unsubdivided | 1 | Tremolite Schist | Contains |
|---|---|---|---|---|
| Intermediate Tuff | 2 | Tuff | Near | |
| Sandstone | 3 | Greywacke | Near | |
| Porphyry-unsubdivided | 4 | Near | ||
| Gabbro | 5 | Near | ||
| Ultramafic lava flow-unsubdivided | 6 | Epiclastic | Near | |
| Mafic lava flow-unsubdivided | 7 | Near |
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Chalcopyrite | Economic | Ore | ||||
| Carbonate | Alteration | Carbonatization | 1 | ||||
| Biotite | Alteration | Biotitic | 2 |
Mar 13, 2008 (Mark Puumala) - Esso Minerals Canada diamond drill hole FO88-9 was reported by Hall (1988) to have encountered anomalous gold mineralization (833 ppb over 1.34 m) in intensely deformed, carbonatized and biotitized tremolite schist containing 3 mm quartz-carbonate veinlets mineralized with rare chalcopyrite. The host tremolite schist is part of an ultramafic intrusion that was intersected near the top of the drill hole. Tuffaceous felsic and intermediate metavolcanics (with intercalated greywacke horizons) were the dominant lithologies reported in the lower (northern) portions of the drill hole. Other lithologies noted in the drill hole included quartz-feldspar porphyry and gabbro intrusions (Hall 1988). This occurrence is located immediately south of a northwest-striking ultramafic epiclastic horizon (Hall 1987 and 1988) that hosts the nearby Fred's Zone occurrence (MDI53B08NE00009).
| Rank | Classification |
|---|---|
| 1 | Lode (Gold) |
| Rank | Characteristic |
|---|---|
| 1 | Sheared |
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For detailed information regarding this mineral record please contact the Thunder Bay North Resident Geologist District Office