Ontario Geological Survey
Permanent Link to this Record:
MDI52H13NE00019
| Record Name(s) | Puddy Lake - 9999 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1997-Mar-03 |
| Date Last Modified | 2022-Sep-27 |
| Created By | |
| Revised By |
Primary Commodities: Soapstone, Talc
Township or Area: Puddy Lake Area
Latitude: 49° 58' .2" Longitude: -89° 31' 18.19"
UTM Zone: 16 Easting: 319161.019 Northing: 5537978.769 UTM Datum: NAD83
Resident Geologist District: Thunder Bay South
NTS Grid: 52H13NE
Point Location Description: Occurrence
Location Method: Conversion from MDI
Access Description: Puddy Lake is located 175 km northwest of Thunder Bay and 50 km west of Lake Nipigon. A talc schist outcrop occurs south of the lake, at the eastern end. The property is accessible by float-plane.
Mining exploration and development in the area has been concentrated on the chromite occurrences hosted by the same ultramafic intrusion that hosts the talc. An exploration shaft was sunk by Chromium Mining and Smelting Corporation Limited in the early 1930s.
Province: Superior
Subprovince: Wabigoon
Geological Age: Archean
Dec 07, 2005 (R Degagne) - The area was mapped by Graham (1931), Hurst (1932), Kidd (1934) and Kustra (1967). Mineralogical work was done by Simpson and Chamberlain (1967). The Puddy Lake area is underlain by a large serpentinized ultramafic intrusion, exposed for approximately 7 km by 1 km (Whittaker 1986). The intrusion is located at the contact between quartzo-feldspathic paragneiss to the north and volcanogenic metasediments to the south. Porphyritic quartz monzonite occurs along a portion of the southern contact of the ultramafic unit.
| Rock Type | Rank | Composition | Texture | Relationship | Paragneiss | 1 | Quartz-Feldspathic | Near |
|---|---|---|---|---|
| Quartz Monzonite | 2 | Porphyritic | Near | |
| Terrigenous-Clastic-Unsubdivided | 3 | Volcanogenic Metasediments | Near | |
| Serpentinite | 4 | Serpentinite; Tlc | Med - Coarse Grained | Contains |
Dec 07, 2005 (R Degagne) - The ultramafic intrusion has been pervasively serpentinized (Whittaker 1986). The unit was identified by textural and mineral evidence as being originally dunite and peridotite (Karvinen 1968). Talc occurs throughout the unit but is concentrated along shear zones and adjacent to the contacts. Rocks along the southern boundary contain the most talc (Watkinson and Mainwaring 1980). The occurrence has an exposed length of 60 m and a width of 15 m (K. Kuhner, Prospector personal communication, 1990).
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Talc | Economic | Ore | ||||
| 2 | Serpentine | Economic | Gangue | ||||
| 3 | Dolomite | Economic | Gangue | ||||
| Talc | Alteration | Steatization | 1 | Unknown | Disseminated | ||
| Dolomite | Alteration | Steatization | 2 | Unknown | Disseminated | ||
| Serpentine | Alteration | Steatization | 3 | Unknown | Disseminated |
Dec 07, 2005 (R Degagne) - The stone is medium to coarse grained. The hardness is variable throughout the unit. It is moderately magnetic. On weathered surfaces, it has a greyish colour, however on fresh surfaces, the stone has a mottled appearance with a pinkish-red colour. TEST RESULTS: 1. Mineralogy: Talc 75%, Chlorite 0%, Serpentine <5%, Dolomite 20%, Magnesite 0%, Magnetite 0%, Epidote 0%. Geoscience Laboratories, Ontario Geological Survey, MNDM 2. Chemical Analysis: Si02 42.1%, Al203 0.39%, Fe203 1.22%, Fe0 1.26%, Mg0 27.4%, Ca0 9.17%, Na20 0.05%, K20 0.00%, Ti02 0.00%, P205 0.01%, Mn0 0.03%, C02 14.4%, S 0.01%, H20+ 3.01%, H20- 0.09%, Total 99.14%, LOI 17.8%. Geoscience Laboratories, Ontario Geological Survey, MNDM.
| Shape | Length | Thickness | Depth | Strike | Dip | Plunge | Trend | Age | Reference |
|---|---|---|---|---|---|---|---|---|---|
| Unknown | 60 | 15 |
Date: Mar 03, 1997
Geologist: R Degagne
Notes: N/A
Map - Obonga Lake area, west part, District of Thunder Bay
Publication Number: P0416 Scale: 1:15,840 Date: 1997
Author: Kustra C.R.
Publisher Name: Ontario Dept. of Mines
Location:
Mono - Soapstone in Ontario
Publication Number: OFR5764 Page: 109-112 Date: 1991
Author: Gerow M.C., Sherlock E.J., Bellinger J.A.
Publisher Name: Ontario Geological Survey
Location:
Part - Obonga Lake chromite area, District of Thunder Bay
Publication Number: ARV39-02.003 Page: 51-60 Date: 1998
Author: Graham A.R.
Publisher Name: Ontario Dept. of Mines
Location:
Part - Chromite deposits of the Obonga Lake area, District of Thunder Bay
Publication Number: ARV40-04.004 Page: 111-119 Date: 1998
Author: Hurst M.E.
Publisher Name: Ontario Dept. of Mines
Location:
Thesis - The Origin and Petrology of the Mafic Ultramafic Rocks of the Obonga Leigh Lakes Area
Publication Number: HBSc Thesis Date: 1968
Author: Karvinen, W.O.
Publisher Name: Queen's University
Location: Thunder Bay RGP
Publication - Obonga-Kashishibog area, Thunder Bay District, Ontario; Summary Report 1933, Part D; Geological Survey of Canada, Separate Report 2351
Publication Number: GSC SR 2351 Page: 16-37 Date: 1933
Author: Kidd, D F
Publisher Name: Geological Survey of Canada
Location: https://doi.org/10.4095/102114
Book - NICKEL DIST. IN SERPENTINES FROM PUDDY LAKE, ONT., P.67-91
Publication Number: VOL 18 Page: 67-91 Date: 1967
Author: Simpson, P.R. and Chamberlain, J.A.
Publisher Name:
Location: GEOL. ASSOC. OF CANADA PROCEEDINGS
Book - Chromite in Ontario: geology of chromite zones, Puddy Lake-Chrome Lake area, and chromite chemistry
Publication Number: MP093.046 Date: 1997
Author: Watkinson D.H., Mainwaring P.R.
Publisher Name: Ontario Geological Survey
Location:
Mono - Chromite deposits in Ontario
Publication Number: S055 Date: 1986
Author: Whittaker P.J.
Publisher Name: Ontario Geological Survey
Location:
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