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Ontario Geological Survey
Permanent Link to this Record:
MDI52F04NE00004
| Record Name(s) | Pipestone Lake North - 1895, Pipestone Lake, Northwest Arm - 1895 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1991-Jan-23 |
| Date Last Modified | 2022-Aug-02 |
| Created By | |
| Revised By |
Primary Commodities: Soapstone
Township or Area: Brooks Lake Area
Latitude: 49° 8' 22.8" Longitude: -93° 33' 3.56"
UTM Zone: 15 Easting: 459812.09 Northing: 5443128.07 UTM Datum: NAD83
Resident Geologist District: Kenora
NTS Grid: 52F04NE
Point Location Description: Occurrence
Location Method: Conversion from MDI
Access Description: The occurrence is located 60 km north northwest of the town of Fort Frances in the southern part of a bay on the southwestern shore of the Northwest Arm of Pipestone Lake. Pipestone Lake is accessible by boat via Burditt Lake, from the north end of Highway 615, 45 km northwest of Fort Frances.
Coleman (1895) noted that the material had been used by indigenous peoples for making ornamental ceremonial pipes.
Province: Superior
Subprovince: Wabigoon
Geological Age: Archean
Dec 07, 2005 (R Degagne) - The area was mapped by Thomson (1936) and Edwards (1980). The area is underlain by metasediments and metavolcanics intruded by mafic and ultramafic and felsic intrusive rocks. The occurrence lies within a small northwest-trending lens-shaped peridotite body that is fault bounded on its northeast side. Storey (in press) notes that the talc-rich rock occurs adjacent to this fault.
| Rock Type | Rank | Composition | Texture | Relationship | Mafic lava flow-unsubdivided | 1 | Near |
|---|---|---|---|---|
| Terrigenous-Clastic-Unsubdivided | 2 | Near | ||
| Peridotite | 3 | Peridotite | Fine Grained | Host |
| Granitoid-Unsubdivided | 4 | Near | ||
| Ultramafic Schist | 5 | Soapstone; Tlc, Dol, Chl, Mag | Contains |
Dec 07, 2005 (R Degagne) - The area was mapped by Thomson (1936) and Edwards (1980). The area is underlain by metasediments and metavolcanics intruded by mafic and ultramafic and felsic intrusive rocks. The occurrence lies within a small northwest-trending lens-shaped peridotite body that is fault bounded on its northeast side. Storey (in press) notes that the talc-rich rock occurs adjacent to this fault.
Oct 27, 2017 (Therese Pettigrew) - The talcose rocks are exposed in outcrops along the lakeshore. The rock is mapped as peridotite by Edwards (1980) and forms part of a small lensoid mafic to ultramafic body bounded by a fault on its east side. The main talcose occurrence is adjacent to this fault zone. The rock is soft, dark green in colour and magnetic. The most talcose rock is very soft, fine grained blue-grey in colour. None of the rocks are foliated. The talcose rocks weather rusty and have a dark brown weathered rind (Storey, 1990).
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Talc | Economic | Ore | ||||
| 1 | Dolomite | Economic | Gangue | ||||
| 2 | Chlorite | Economic | Gangue | ||||
| 3 | Magnetite | Economic | Gangue | ||||
| Talc | Alteration | Steatization | 1 | Unknown | Disseminated | ||
| Dolomite | Alteration | Steatization | 2 | Unknown | Disseminated | ||
| Chlorite | Alteration | Steatization | 3 | Unknown | Disseminated | ||
| Magnetite | Alteration | Steatization | 4 | Unknown | Disseminated |
Dec 07, 2005 (R Degagne) - Storey (in press) described the occurrence. The stone is fine-grained, soft, magnetic, and dark green to blue-grey in colour. The weathered surface of the rock is rusty. X-ray diffraction mineral analysis indicated that talc is the primary mineral in the rock with dolomite and minor chlorite and magnetite.
| Shape | Length | Thickness | Depth | Strike | Dip | Plunge | Trend | Age | Reference |
|---|---|---|---|---|---|---|---|---|---|
| Unknown |
Date: Mar 04, 1997
Geologist: R Degagne
Notes: N/A
Map - Schistose Lake, Kenora District
Publication Number: M2421 Scale: 1:31,680 Date: 1980
Author: Edwards G.R.
Publisher Name: Ontario Geological Survey
Location:
Part - Geology of the Rowan-Straw lakes area
Publication Number: ARV44-04.001 Page: 9-10 Date: 1997
Author: Thomson J.E.
Publisher Name: Ontario Dept. of Mines
Location:
MonoMap - Geology of the Schistose Lake area, District of Kenora
Publication Number: R194 Date: 1980
Author: Edwards G.R.
Publisher Name: Ontario Geological Survey
Location:
Mono - Soapstone in Ontario
Publication Number: OFR5764 Page: 67-68 Date: 1991
Author: Gerow M.C., Sherlock E.J., Bellinger J.A.
Publisher Name: Ontario Geological Survey
Location:
Part - Gold in Ontario, its associated rocks and minerals
Publication Number: ARV04.002 Page: 46, 85 Date: 1998
Author: Coleman A.P.
Publisher Name: Ontario Bureau of Mines
Location:
Mono - An evaluation of the industrial mineral potential of parts of the districts of Kenora and Rainy River
Publication Number: OFR5718 Page: 189-190 Date: 1990
Author: Storey C.C.
Publisher Name: Ontario Geological Survey
Location:
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For detailed information regarding this mineral record please contact the Kenora Resident Geologist District Office