Ontario Geological Survey
Permanent Link to this Record:
MDI000000001698
| Record Name(s) | St. Joe Canada DDH MD87.25 - 1987, Dobie Lake Property - 1987 |
|---|---|
| Related Record Type | |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 2014-Feb-28 |
| Date Last Modified | 2023-Jan-06 |
| Created By | |
| Revised By |
Primary Commodities: Gold
Township or Area: Dobie Lake Area
Latitude: 51° 23' 7.01" Longitude: -91° 13' 55.94"
UTM Zone: 15 Easting: 623011 Northing: 5694154 UTM Datum: NAD83
Resident Geologist District: Thunder Bay North
NTS Grid: 52O06NE
Point Location Description: approximate location of drill collar for MD87.25
Location Method: Based on Assessment
1987: St. Joe Canada Inc. – airborne geophysics. 1987-1991: Bond Gold Canada – assays, DD-20
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 2.14248 | 52P05SW0001 | 52P05SW0001 |
| 2.10844 | 52P03NW0020 | 52P03NW0020 |
| 18 | 52O06NE0006 | 52O06NE0006 |
| 52O06NE8897 | 20000005720 | 20000005720 |
Province: Superior
Subprovince: Uchi
Terrane: North Caribou
Domain: Uchi
Belt: Meen-Dempster
Geological Age: Neoarchean
| Rock Type | Rank | Composition | Texture | Relationship | Mafic lava flow-unsubdivided | 1 | Adjacent |
|---|---|---|---|---|
| Mafic lava flow-unsubdivided | 2 | Silicified | Host | |
| Magnetite Ironstone | 3 | Magnetite Iron Formation | Adjacent |
Apr 11, 2014 (A Wilson) - Diamond drilling intersected a sequence of mafic metavolcanic flows, highly silicified mafic metavolcanic flows and iron formation. The mafic metavolcanic rocks are fine grained to aphanitic with weakly defined schistosity. A 0.5 m wide zone of strong schistosity (fault zone?) is underlain by a strongly silicified zone that is 21.39 m in thickness. Quartz veins were observed in these silicified zones. Below the zone of silicification, the geology is dominated by magnetite ironstone and silicified ironstone. The drill hole terminated in mafic metavolcanic flows.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Pyrite | Economic | Gangue | ||||
| 2 | Pyrrhotite | Economic | Gangue |
Apr 11, 2014 (A Wilson) - Sample 2243 (a 0.6 m section of silicified mafic metavolcanics) assayed 1.37 f/t Au; sample 2244 (a 0.5 m thick section of silicified mafic metavolcanics immediately below Sample 2243) assayed 0.69 g/t Au. Elevated gold values were also found in a silicified zone between 39.28 and 51.20 m. Samples taken from this zone range from 1.37 g/t Au over 0.06m to 5.49 g/t Au over 0.16 m. Elevated gold values were also obtained from DDH MD87.30 (2.74 g/t Au over 1.10 m)
| Rank | Characteristic |
|---|---|
| 1 | Sheared |
Map - Cat Lake-Pickle Lake, geological compilation series, Kenora and Thunder Bay districts
Publication Number: M2218 Scale: 1:253,440 Date: 1976
Author: Sage R.P., Breaks F.W., Troup W.R.
Publisher Name: Ontario Division of Mines
Location:
Map - Precambrian geology, Muskegsagagen-Bancroft lakes area, District of Kenora (Patricia Portion)
Publication Number: M2507 Scale: 1:50,000 Date: 1986
Author: Stott G.M., Wilson A.C.
Publisher Name: Ontario Geological Survey
Location:
MonoMap - Geology of the Cat Lake-Pickle Lake area, districts of Kenora and Thunder Bay
Publication Number: R207 Date: 1982
Author: Sage R.P., Breaks F.W.
Publisher Name: Ontario Geological Survey
Location:
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