Ontario Geological Survey
Permanent Link to this Record:
MDI52P10SE00003
| Record Name(s) | R. Thompson - 1985, Central Patricia Mines Ltd. Occurrence - 9999 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1985-Jul-24 |
| Date Last Modified | 2022-Sep-27 |
| Created By | |
| Revised By |
Primary Commodities: Gold
Secondary Commodities: Sulphur/Pyrite
Township or Area: Miminiska Lake Area
Latitude: 51° 35' 40.28" Longitude: -88° 44' 22.75"
UTM Zone: 16 Easting: 379500.003 Northing: 5717374.997 UTM Datum: NAD83
Resident Geologist District: Thunder Bay North
NTS Grid: 52P10SE, 52P10SW
Point Location Description: TRENCH
Location Method: Conversion from MDI
Access Description: Located 1.2 km northwest of Miminiska Lake and 3.7 km north of the point where the Albany River enters Miminiska Lake. The Thompson occ. is approx. 56 km west of Forth Hope First Nation and approx. 100 km east-northeast of Pickle Lake. Accessible by float plane. Pickle Lake provided the closest air service.
1951: Trenching and 9 ddh - R. Thompson. 1978-82: ddh, MAG, EM, VLF-EM, and IP, ddh - New Jersey Expl. Company.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 2.2483 | 52P10NE2001 | 52P10NE2001 |
| 2.30150 | 20000000511 | 20000000511 |
Province: Superior
Subprovince: Uchi
Terrane: North Caribou
Domain: Uchi
Belt: Miminiska-Fort Hope
Geological Age: Neoarchean
Oct 11, 2006 (Mark Puumala) - The geology of the Miminiska Peninsula area was mapped by Wallace (1981), who identified three major supracrustal rock sequences. These include two mafic metavolcanic-dominated sequences and one metasedimentary rock-dominated sequence. The oldest of these units is interpreted to be a thick, predominantly mafic metavolcanic sequence that is found in the southern portion of the Miminiska Peninsula and the area immediately south of Miminiska Lake. These mafic metavolcanic rocks have in turn been interpreted to be overlain by a metasedimentary rock sequence that is dominated by wacke and mudstone, but also contains significant thicknesses of banded iron formation. The metasedimentary sequence is overlain to the north by a second mafic-metavolcanic rock-dominated sequence. A significant unit of felsic to intermediate pyroclastic rocks has also been mapped in the western portion of this area (southeast of Howells Lake). This unit is located immediately south of the metasedimentary sequence west of Miminiska Lake, but is enclosed within the metasedimentary rocks further to the east. This area is bounded to the northwest by felsic intrusive rocks of the Troutfly Lake Batholith. Stratigraphic units in the vicinity of Howells Lake generally strike approximately northeast, with steep, near-vertical dip. Further to the northeast, towards Keezhik Creek, stratigraphy strikes in a more easterly orientation. Wallace (1981) indicates that foliation is generally oriented sub-parallel to the primary sedimentary bedding and igneous flow contact features. Foliation and shearing are noted by Clark (2005) to be most prominent in tuffaceous mafic metavolcanic layers. Wallace (1981b) mapped a number of northeast-trending faults and lineaments in this area. More recent maps (e.g., McKay 2004) illustrate a northeast-striking fault that parallels the metavolcanic/metasedimentary rock contact in the vicinity of Howells Lake. This structure appears to be related to many of the gold and antimony/gold occurrences in this area.
| Rock Type | Rank | Composition | Texture | Relationship | Mafic lava flow-unsubdivided | 1 | Pillow Flows & Breccias | Near |
|---|---|---|---|---|
| Vein | 2 | Quartz And/Or Carbonate | Host | |
| Mudstone | 3 | Phyllite | Near | |
| Schist-Unsubdivided | 4 | Quartz-Sericite | Near | |
| Claystone | 5 | Arenite And Wacke | Near | |
| Sandstone | 6 | Arentie And Wacke | Near |
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Chalcopyrite | Economic | Ore | ||||
| 2 | Pyrite | Economic | Ore | ||||
| 3 | Pyrrhotite | Economic | Ore | ||||
| 4 | Gold | Economic | Ore |
Oct 11, 2006 (Mark Puumala) - The Thompson occurrence is located within mafic metavolcanic rocks, immediately north of the contact with metasedimentary rocks. This contact has been interpreted as a fault (northeast-striking) on a geological compilation map prepared by McKay (2004). Mason and White (1995) describe the gold mineralization as being associated with fine-grained disseminated pyrite in foliation-parallel white quartz and/or carbonate veins. The strike of the steetly-dipping foliation in this area was measured by Wallace (1981) as ranging from 045 to 050. The most favourable assay results obtained from this location include 0.58 oz/ton Au over 1 foot (Central Patricia Mines ddh H1) and 0.16 oz/ton over 5 feet (Central Patricai Mines ddh H5C).
| Rank | Classification |
|---|---|
| 2 | Lode (Gold) |
| 1 | Vein |
| Rank | Characteristic |
|---|---|
| 2 | Sheared |
| 1 | Vein |
Map - Keezhik-Miminiska lakes area, District of Kenora (Patricia Portion), Ontario
Publication Number: ARM48E Scale: 1:63,360 Date: 1997
Author: Prest V.K.
Publisher Name: Ontario Dept. of Mines
Location:
Map - Fort Hope-Lansdowne House sheet, geological compilation series, Cochrane, Kenora, and Thunder Bay districts
Publication Number: M2237 Scale: 1:253,440 Date: 1972
Author: Thurston P.C., Carter M.W., Riley R.A.
Publisher Name: Ontario Dept. of Mines and Northern Affairs
Location:
Map - Attwood Lake, Thunder Bay District
Publication Number: M2436 Scale: 1:31,680 Date: 1981
Author: Wallace H.
Publisher Name: Ontario Geological Survey
Location:
MonoMap - Geology of the Miminiska Lake area, districts of Kenora (Patricia Portion) and Thunder Bay
Publication Number: R214 Page: 86 Date: 1981
Author: Wallace H.
Publisher Name: Ontario Geological Survey
Location:
Map - Miminiska Peninsula, Kenora and Thunder Bay districts
Publication Number: M2416 Scale: 1:31,680 Date: 1979
Author: Wallace H.
Publisher Name: Ontario Geological Survey
Location:
Part - Geology of the Keezhik-Miminiska lakes area
Publication Number: ARV48-06 Page: 1-21 Date: 1998
Author: Prest V.K.
Publisher Name: Ontario Dept. of Mines
Location:
Mono - Operation Fort Hope
Publication Number: MP042 Date: 1970
Author: Thurston P.C., Carter M.W.
Publisher Name: Ontario Dept. of Mines and Northern Affairs
Location:
MonoMap - Geology of the Miminiska Lake area, districts of Kenora (Patricia Portion) and Thunder Bay
Publication Number: R214 Date: 1981
Author: Wallace H.
Publisher Name: Ontario Geological Survey
Location:
Mono - Mineral Occurrences and Prospects in the Fort Hope-Winisk Area
Publication Number: OFR5926 Date: 1995
Author: Mason J.K., White G.D.
Publisher Name: Ontario Geological Survey
Location:
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