Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI41P12SW00123

Record: MDI41P12SW00123

General

Commodities

Primary Commodities: Gold

Location

Township or Area: Chester

Latitude: 47° 33' 8.5"    Longitude: -81° 57' 29.34"

UTM Zone: 17    Easting: 427910.58   Northing: 5266993.7    UTM Datum: NAD83

Resident Geologist District: Timmins

NTS Grid: 41P12SW

Point Location Description: Old trench on shoreline of Clam Lake

Location Method: Field Visit with GPS

Access Description: Access is via the Chester logging road which branches off the Sultan mail haul road. For this road, easy access is possible to the more recent trenches via an exploration trail and then to the shore of Clam Lake via an overgrown trail. Alternatively, boat access is possible directly to the old trenches across Clam Lake from the landing on theold Chester Shannon mine access road.

Exploration History

1933: Chester Shannon Group - Young Shannon Gold Mines Ltd. - discovery. 1961: Jonsmith Mines - 1 ddh. 1971: Gogama Minerals - ground VLF-EM survey. 1978: McVittie and Canadian Crest Gold Mines Ltd. - airborne magnetometer survey. 1978: Baxter Minerals - Canadian Crest Gold MInes Ltd. - airborne magnetometer survey. 1990: Hargor Resources - Canadian Gold and Metal Inc. - regional airborne magnetic and VLF-Em survey. 1981: Kidd Resources - stripping. 1984: Chester Minerals Limited -EM, Mag. 1987: Isaac Burns - diamond drilling (3 ddh). 1987: Chesbar Resources - ground magnetic, VLF-EM survey, mapping. 2011: Sanatana Resources Inc. – AEM, AMag.

Assessment Work on File

Geology

Province: Superior

Subprovince: Abitibi

Terrane: Wawa-Abitibi

Belt: Swayze

Geological Age: Neoarchean   Geochronological Age: 2740 MA   Geochron. Age Ref.: GSC OF 3384G

Geology Comments

Dec 07, 2005 (A Wilson) - The main trench is centred on a 1 m thick shear zone which doesnot appear to be part of a network of shear zones. In the stripped area, the smaller quartz veins are attenuated, locally are rotated in an anti-clockwise manner or form an en echelon array with a left handed step.

Lithology

Lithology Comments

Feb 09, 2015 (A Wilson) - The main rock type is a massive medium-grained siliceous granodiorite. There are also significant occurrences of a medium-grained hornblende diorite to quartz diorite, which may be a related phase in the Chester Granitoid Complex. The granodiorite is cut by a number of shear zones with gradational boundaries to the more massive phases. In the stripped area, parallel to the shear zone is a 4 m thick, biotitic lamprophyre dike. This dike is moderately foliated with the same orientation as the adjacent shear zone. In contrast, there are some strongly altered/foliated mafic dikes together with medium grained felsic dikes that contain approximately 30% orientated mafic grains. All the rock types present are pervasively altered by carbonate. This is generally weak in the granodiorite, diorite and lamprophyre dikes, but is markedly stronger in the shear zones and mafic dikes. In the stripped area, chlorite alteration is common as wispy veins within the shear zone, and as mantles surrounding the quartz veins. Biotite occurs in discrete thin lamellae within the sheared material. tourmaline and magnetite alteration have been reported.

Mineralization

Mineralization Comments

Feb 09, 2015 (A Wilson) - There are a number of quartz or quartz and iron carbonate veins within a shear zone exposed in the trenches. The veins pinch and swell from 2m to thin stringers. The surrounding shear zone locally contains sparse disseminated pyrite and chalcopyrite. Mineralization within the veins varies from rather lean to pyrite, chalcopyrite and gold intimately associatated with biotite near the lamprophyre contacts. In the stripped area, rust spots centred on pyrite grains occur, but are not concentrated in any unit. A grab sample collected by the OGS in 193 returned 0.02 g/t Au, 0.1 g/t Ag.

Assay Samples

Mineral Record Details

Mineral Zones - Size and Shape

Rank: 1       Structure Type: Shear

References

File - Resident Geologist files T-6349

Publication Number: Date:

Author:

Publisher Name:

Location: Timmins RGP office

Map - Three Duck Lakes area, District of Sudbury, Ontario

Publication Number: ARM41D Scale: 1:47,520    Date: 1997

Author: Laird H.C.

Publisher Name: Ontario Dept. of Mines

Location:

Part - Geology of the Three Duck lakes area

Publication Number: ARV41-03.001 Date: 1998

Author: Laird H.C.

Publisher Name: Ontario Dept. of Mines

Location:

Map - Geological series, Precambrian geology of Chester and Yeo townships, and parts of Neville and Potier townships, Jerome area, Sudbury District

Publication Number: P2449 Scale: 1:15,840    Date: 1981

Author: Siragusa G.M.

Publisher Name: Ontario Geological Survey

Location:

Part - Geology of the Makwa-Churchill area

Publication Number: ARV43-03.002 Page: 77-78  Date: 1998

Author: Laird H.C.

Publisher Name: Ontario Dept. of Mines

Location:

Map - Precambrian Geology, Parts of Chester, Neville, Potier and Yeo Townships

Publication Number: OFM0214 Scale: 1:15,840    Date: 1993

Author: Siragusa G.M.

Publisher Name: Ontario Geological Survey

Location:

MonoMap - Geology, Geochemistry and Mineralization of the Southern Margin of the Swayze Belt

Publication Number: OFR5844 Page: 84  Date: 1993

Author: Siragusa G.M.

Publisher Name: Ontario Geological Survey

Location:

Map - Geology, Swayze greenstone belt, Gogama, Ontario

Publication Number: OF3384G Scale: 1:50,000    Date: 1999

Author: Heather, K B; Shore, G T

Publisher Name: Geological Survey of Canada

Location: https://doi.org/10.4095/210455

MonoMap - Mineral Prospects of the Swayze Greenstone Belt (Volume 1, Parts of NTS 41 O and Volume 2, Parts of NTS 41 P, 42 A and 42 B)

Publication Number: OFR5912 Page: 414-416  Date: 1995

Author: Fumerton S.L., Houle K.A.

Publisher Name: Ontario Geological Survey

Location:

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For detailed information regarding this mineral record please contact the Timmins Resident Geologist District Office