Ontario Geological Survey
Permanent Link to this Record:
MDI52O02NW00002
| Record Name(s) | Dempster Southwest - 1983, Duffell Lake A - 1983, Duffell Lake #5 - 9999 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1983-Feb-28 |
| Date Last Modified | 2022-Sep-27 |
| Created By | |
| Revised By |
Primary Commodities: Gold
Township or Area: Duffell Lake Area
Latitude: 51° 13' 41.3" Longitude: -90° 58' 22.34"
UTM Zone: 15 Easting: 641537.764 Northing: 5677147.63 UTM Datum: NAD83
Resident Geologist District: Thunder Bay North
NTS Grid: 52O02NW
Point Location Description: Noranda sample 2794 located in the NE corner of claim 732433.
Location Method: Data Compilation
Access Description: The Dempster Southwest gold occurrence is located about 58 km south of Pickle Lake. The gold occurrence is found in outcrops along the Ear Falls-Pickle Lake power line, 525 m southwest of the Kawinogans (Crow) River. Access is via appropriately equipped aircraft from Pickle Lake to a small lake just north of the occurrence (100-150 m). The small lake is part of the Kawinogans River. Under freezing conditions, a seasonal road from Pickle Lake along the Ear Falls-Pickle Lake power line may also be used to access this occurrence.
This occurrence was discovered by an Ontario Department of Mines geological mapping party lead by W.D. Harding (1935). He reports 'A grab sample from a mineralized quartz porphyry dyke...gave 0.02 oz/ton Au.' 1983: Noranda Exploration Company Ltd. staked 20 claims to cover the mineral occurrence. 1984: Noranda conducted an exploration program consisting of geological mapping, magnetometer and VLF-Em surveys and limited rock and humus geochemical sampling along a pace and compass, flagged-line grid. 1986: Noranda cut a grid on the property and completed geological, magnetometer, HLEM and humus geochemistry surveys on the claim group. 1990: Bond Gold Canada Ltd. acquired the Noranda claims. Geology and rock geochemistry surveys were completed over the occurrence area.
Province: Superior
Subprovince: Uchi
Terrane: North Caribou
Domain: Uchi
Belt: Meen-Dempster
Geological Age: Neoarchean
Dec 07, 2005 (B Nelson) - The Dempster Southwest gold occurrence consists of a sheared quartz-feldspar porphyry dyke mineralized with up to 2% pyrite. The porphyry is weakly altered by an unidentified carbonate species. The dyke strikes about 078 degrees and dips vertically. It has a width between 15 cm and 25 cm, and is traceable in outcrop for about 100 m. The quartz-feldspar porphyry intrudes a metasedimentary sequence of thinly bedded to laminated, siliceous greywackes.
| Rock Type | Rank | Composition | Texture | Relationship | Quartz Porphyry | 1 | Contains |
|---|---|---|---|---|
| Sandstone | 2 | Siliceous Greywacke | Near |
Dec 07, 2005 (B Nelson) - The quartz-feldspar porphyry intrudes a metasedimentary sequence of thinly bedded to laminated, siliceous greywackes.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Pyrite | Economic | Ore | ||||
| Unknown | Alteration | Carbonatization | 1 | Weak |
Dec 07, 2005 (B Nelson) - Mineralization occurs in the shear zone. Grab samples from the quartz-feldspar porphyry dyke returned assays up to 0.05 oz Au/ton.
Dec 07, 2005 (B Nelson) - Unknown carbonate weakly alters the porphyry.
| Rank | Classification |
|---|---|
| 1 | Lode (Gold) |
| Rank | Characteristic |
|---|---|
| 1 | Sheared |
Map - Cat Lake-Pickle Lake, geological compilation series, Kenora and Thunder Bay districts
Publication Number: M2218 Scale: 1:253,440 Date: 1976
Author: Sage R.P., Breaks F.W., Troup W.R.
Publisher Name: Ontario Division of Mines
Location:
Part - Geology of the Cat River-Kawinogans Lake area
Publication Number: ARV44-06.002 Page: 69 Date: 1997
Author: Harding W.D.
Publisher Name: Ontario Dept. of Mines
Location:
Map - Precambrian geology, Muskegsagagen-Bancroft lakes area, District of Kenora (Patricia Portion)
Publication Number: M2507 Scale: 1:50,000 Date: 1986
Author: Stott G.M., Wilson A.C.
Publisher Name: Ontario Geological Survey
Location:
MonoMap - Geology of the Cat Lake-Pickle Lake area, districts of Kenora and Thunder Bay
Publication Number: R207 Date: 1982
Author: Sage R.P., Breaks F.W.
Publisher Name: Ontario Geological Survey
Location:
Map - Cat River-Kawinogans Lake area, District of Kenora (Patricia Portion), Ontario
Publication Number: ARM44F Scale: 1:126,720 Date: 1997
Author: Harding W.D.
Publisher Name: Ontario Dept. of Mines
Location:
Mono - Mineral Deposits of the Central Portion of Uchi Subprovince, Volume 1, Meen Lake to Kesagiminnis Lake Portion
Publication Number: OFR5869 Page: 56 Date: 1993
Author: Seim G.Wm.
Publisher Name: Ontario Geological Survey
Location:
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