Ontario Geological Survey
Permanent Link to this Record:
MDI42C02NW00027
| Record Name(s) | Dumont Sample 4073 - 2000 |
|---|---|
| Related Record Type | Simple |
| Record Status | Occurrence |
| Date Created | 2000-Nov-30 |
| Date Last Modified | 2022-Jan-05 |
| Created By | A Wilson |
| Revised By | A Wilson |
Primary Commodities: Diamond
Township or Area: Menzies
Latitude: 48° 10' 54.4" Longitude: -84° 52' 2.05"
UTM Zone: 16 Easting: 658530.86 Northing: 5338703.75 UTM Datum: NAD83
Resident Geologist District: Sault Ste. Marie
NTS Grid: 42C02NW
Point Location Description: Stripped outcrop
Location Method: Data Compilation
Access Description: Drive north along Highway 17 for approximately 28 km from the junction between Highway 17 and Highway 101. Follow the Belanger forestry road northeast for approximately 8 km.
2000: Dumont Nickel Inc. - sampling.
Province: Superior
Subprovince: Wawa
Terrane: Wawa-Abitibi
Belt: Michipicoten
Tectonic Assemblage: Wawa
Geological Age: Neoarchean Geochronological Age: 2750 MA Geochron. Age Ref.: GOO VOL 1
Metamorphism Type: Regional
Metamorphism Grade: Greenschist
Dec 07, 2005 (A Wilson) - The diamond occurrences appear to be restricted to a D1 recumbent nappe in the west-central portion of the Michipicoten greenstone belt. The nappe is imbricated by south-vergin reverse faults. The direction of nappe transport is from south to north and it lies immediately north and adjacent to the Kapuskasing Structural Zone. This thrusting and shortening may be related to the tectonic events along the Kapuskasing Structural Zone. The western limit of the nappe is likely the Dickenson Lake fault that passes to the west of the Dickenson Lake stock. The nappe is not likely to extend east beyond the Marsden Fault. While lamrophyre dikes favourable to hosting diamond and ones that cut the diamond-bearing lamprophyres are commone east of the Dickenson Lake stock, they are absent west of the the stock.
| Rock Type | Rank | Composition | Texture | Relationship | Lamprophyre-Unsubdivided | 1 | Xenolith-Bearing | Host |
|---|
Dec 07, 2005 (A Wilson) - The xenolith-bearing lamprophyre dike is hosted by intermediate to mafic tuffs and breccias and metasedimentary rocks.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Diamond | Economic | Ore |
Dec 07, 2005 (A Wilson) - A 49.2 kg sample collected by Dumont Nickel Inc. returned 12 microdiamonds. Ten of the diamonds are clear yellow fragments, one diamond fragment is yellow and a third diamond fragment is considered to be a macrodiamond fragment.
Book - DUMONT NICKEL INC. PRESS RELEASES
Publication Number: Clippings Scale: Date: 2000
Author:
Publisher Name:
Map - Manitouwadge-Wawa sheet, geological compilation series, Algoma, Cochrane, Sudbury and Thunder Bay districts
Publication Number: M2220 Scale: 1:253,440 Date: 1972
Author: Milne V.G., Giblin P.E., Bennett G., Thurston P.C., Wolfe W.J., Giguere J.F., Leahy E.J., Rupert R.J.
Publisher Name: Ontario Division of Mines
Map - Precambrian Geology Compilation Series - White River Sheet
Publication Number: M2666 Scale: 1:250,000 Date: 2001
Author: Santaguida F.
Publisher Name: Ontario Geological Survey
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For detailed information regarding this mineral record please contact the Sault Ste. Marie Resident Geologist District Office