Ontario Geological Survey
Permanent Link to this Record:
MDI52F04SE00008
| Record Name(s) | Ross Island - 9999, Pipestone Lake South - 1983 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Discretionary Occurrence |
| Date Created | 1983-May-26 |
| Date Last Modified | 2022-May-13 |
| Created By | |
| Revised By |
Primary Commodities: Soapstone
Township or Area: Dash Lake Area
Latitude: 49° 3' 53.78" Longitude: -93° 33' 27.57"
UTM Zone: 15 Easting: 459264.703 Northing: 5434824.54 UTM Datum: NAD83
Resident Geologist District: Kenora
NTS Grid: 52F04SE
Point Location Description: Occurrence
Location Method: Conversion from MDI
Access Description: The occurrence is located 52 km north northwest of the town of Fort Frances on the south shore of Ross Island in Pipestone Lake. Pipestone Lake is accessible by boat via Burditt Lake, from the north end of Highway 615, 45 km northwest of Fort Frances.
There is no recorded development at this site.
Province: Superior
Subprovince: Wabigoon
Geological Age: Archean
Dec 07, 2005 (R Degagne) - The area was mapped by Thomson (1936) and Edwards (1983a). The area is underlain by mafic metavolcanics, and mafic and ultramafic intrusive rocks. These units are cross-cut by a diabase dike.
| Rock Type | Rank | Composition | Texture | Relationship | Mafic lava flow-unsubdivided | 1 | Adjacent |
|---|---|---|---|---|
| Peridotite | 2 | Peridotite; Tlc,Asb,C,Srp,Chl | Fne -Grained | Contains |
| Diabase | 3 | Diabase | Near |
Dec 07, 2005 (R Degagne) - The area was mapped by Thomson (1936) and Edwards (1983a). The area is underlain by mafic metavolcanics, and mafic and ultramafic intrusive rocks. These units are cross-cut by a diabase dike. The soapstone was formed by alteration of a peridotite sill (Storey 1986). Storey notes that (quote) The rock called soapstone is a fine-grained rusty weathering zone about 3 m wide; the strike length is unknown due to overburden and water cover. The rock is foliated 0800/850S. The original rock is a dark green to black, fine-grained peridotite. The contact with the soapstone is gradational over 1 m. Foliation in the peridotite is the same as that of the soapstone. (unquote) The talcose unit was mapped by Edwards as also occurring 5.5 to 8 km southwest of this location and for 1.5 km northeast. Edwards (1983a) noted: A poorly exposed, narrow (less than 30 cm) vein of talcose, slip-fibre asbestos was formed in metaperidotite (now talc, carbonate, and serpentine), 240 m from the west end of the south shore of Ross Island.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Talc | Economic | Ore | ||||
| 1 | Chlorite | Economic | Gangue | ||||
| 2 | Asbestos | Economic | Gangue | ||||
| 3 | Carbonate | Economic | Gangue | ||||
| 4 | Serpentine | Economic | Gangue | ||||
| Talc | Alteration | Steatization | 1 | Veins | |||
| Asbestos | Alteration | Steatization | 2 | Veins | |||
| Chlorite | Alteration | Steatization | 3 | ||||
| Carbonate | Alteration | Carbonatization | 4 | ||||
| Serpentine | Alteration | Steatization | 5 |
Dec 07, 2005 (R Degagne) - Storey (1986) reported X-ray diffraction mineral analysis of a sample indicated chlorite as the major constituent of the rock and talc as a minor constituent.
| Shape | Length | Thickness | Depth | Strike | Dip | Plunge | Trend | Age | Reference |
|---|---|---|---|---|---|---|---|---|---|
| Unknown | 3 |
Date: Mar 03, 1997
Geologist: R Degagne
Notes: N/A
Mono - Preliminary report of the building and ornamental stone inventory, Kenora and Rainy River districts
Publication Number: OFR5446 Page: 93 Date: 1983
Author: Storey C.C.
Publisher Name: Ontario Geological Survey
Location:
MonoMap - Geology of the Bethune Lake area, districts of Kenora and Rainy River
Publication Number: R201 Page: 24-25 Date: 1983
Author: Edwards G.R.
Publisher Name: Ontario Geological Survey
Location:
Mono - Building and ornamental stone inventory in the districts of Kenora and Rainy River
Publication Number: MDC027 Page: 101 Date: 1986
Author: Storey C.C.
Publisher Name: Ontario Geological Survey
Location:
Mono - Soapstone in Ontario
Publication Number: OFR5764 Page: 107-108 Date: 1991
Author: Gerow M.C., Sherlock E.J., Bellinger J.A.
Publisher Name: Ontario Geological Survey
Location:
File - Resident Geologist files
Publication Number: Date: 1997
Author:
Publisher Name:
Location: Kenora RGP
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