Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI42E13NW00006

Record: MDI42E13NW00006

General

Mineral Record Identification
Record Name(s) Crooked Green Lake #1 - 1980, Amukun Sample 22 and 23 - 1980
Related Record Type Simple
Related Record(s)
Record Status Occurrence
Date Created 2000-Sep-26
Date Last Modified 2022-Sep-27
Created By
Revised By

Commodities

Primary Commodities: Copper



Location

Township or Area: Martin Lake Area

Latitude: 49° 52' 59.3"    Longitude: -87° 46' 51.24"

UTM Zone: 16    Easting: 443900   Northing: 5525930    UTM Datum: NAD83

Resident Geologist District: Thunder Bay North

NTS Grid: 42E13NW

Point Location Description: Centre of outcrop marked 4b,n some 600 metres northeast of sample site 92 on map 2429.

Location Method: Data Compilation

Access Description: Proceed east from Beardmore, Ontario to secondary highway #801 north for some 28 km to a road that leads to the east-north-east. Follow this bush road for almost 2.7 km to a flat outcrop of melanogabbro with some mafic xenoliths.



Geology

Province: Superior

Subprovince: Wabigoon

Belt: Elmhirst-Castlewood-Klotz

Geological Age: Archean  



Geology Comments

Dec 07, 2005 (Mark O'Brien) - The diorite and/or gabbro area west of Crooked Green Lake varies in appearance. In places, as along the eastern contact near Crooked Green Lake, it is fine grained and distinguished with difficulty from the lavas. Usually it is granular in texture, dark in colour, with or without blue eyes and splashes of quartz. It may be black and entirely hornblendic or white and feldspathic. In thin section, these rocks are composed of feldspar, hornblende, biotite, pyroxene and quartz. (Moorhouse, 1938, p15) The Crooked Green Lake and Con Creek gabbroic-dioritic intrusions are similar to the Pinel Creek Intrusion and shoul dbe investigated for possible copper-nickel mineralization (Amukun, 1980, p 90).




Assay Samples

Assay Samples
CommodityAnalytical MethodDigestion Method ResultUnitLimitQualifier
CopperUnknown.62%
CopperUnknown1.32%

Mineral Record Details

References

Map - Conglomerate Lake, Thunder Bay District

Publication Number: M2429 Scale: 1:31,680    Date: 1980

Author: Amukun S.E.

Publisher Name: Ontario Geological Survey

Location:


MonoMap - Geology of the Conglomerate Lake area, District of Thunder Bay

Publication Number: R197 Page: 61  Date: 1980

Author: Amukun S.E.

Publisher Name: Ontario Geological Survey

Location:


Map - South Onaman area, District of Thunder Bay, Ontario

Publication Number: ARM47H Scale: 1:63,360    Date: 1997

Author: Moorhouse W.W.

Publisher Name: Ontario Dept. of Mines

Location:


Part - Geology of the south Onaman area

Publication Number: ARV47-08 Date: 1998

Author: Moorhouse W.W.

Publisher Name: Ontario Dept. of Mines

Location:


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For detailed information regarding this mineral record please contact the Thunder Bay North Resident Geologist District Office