Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI41P12SW00127

Record: MDI41P12SW00127

General

Commodities

Primary Commodities: Gold

Secondary Commodities: Copper, Bismuth

Location

Township or Area: Chester

Latitude: 47° 33' 31.01"    Longitude: -81° 51' 25.43"

UTM Zone: 17    Easting: 435523.59   Northing: 5267599.71    UTM Datum: NAD83

Resident Geologist District: Timmins

NTS Grid: 41P12SW

Point Location Description: Shaft/pit in trench

Location Method: Field Visit with GPS

Access Description: Easy access is possible as the stripped areas are located within 100m of Highway 144 and the old abandoned Makwa Road.

Exploration History

1933: Eccles-Holmes - trenching and pitting, excavation of shaft. 1970-71: Lava Minerals - IP survey. 1979-80: Sims Industries - airborne magnetic survey, prospecting, sampling, ground magnetic, VLF-EM survey. 198: Hargor Resources - trenching. 1985: Blue Falcon Mines - airborne VLF-EM and magnetic survey, prospecting. 1987-89: Silver Butte Resources - soil geochemistry, VLF-EM survey, stripping, mapping sampling.2007: Augen Gold Corp. – AEM, AMag, ARAD. 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

Oct 17, 2013 (A Wilson) - The earlier intrusive phases have a number of foliations. The earlier foliations in inclusions and xenoliths are locally isoclinally folded and partially annealed. The numerous later shear zones, which form a network, also have a right lateral displacement. The general trend of these shears is 280 to 310 and dips 80 north.

Lithology

Lithology Comments

Oct 17, 2013 (A Wilson) - The host rock to the mineralization, consists of a complex mixture of the Chester Granitoid complex. The phases present range from the diorite - quartz diorite - granodiorite with some possible mafic volcanic xenoliths. The diorite contains hornblende altered to chlorite. It is medium grained and displays several foliations. The more felsic phases have intruded the dioritic phase in small dikes and irregular plugs. The whole assemblage has been intruded by a number of Matachewan diabase dikes that are typically between 2 and 5 m in thickness. These dikes trend 160/90. Alteration in the area is associated with the veins and shear zones. The most widespread is strong chlorite alteration up to a half metre from a shear. Carbonate alteration is more restrictive and is typically associated with those shear zones that contain quartz veining. Locally associated with the carbonate alteration is some light sericite alteration.

Mineralization

Mineralization Comments

Oct 17, 2013 (A Wilson) - Some disseminated, fine-grained, pyrite occurs in a quartz vein and adjacent host rock at the shaft. The quartz veins are attenuated and are of two ages. The earlier veins are relatively thick (<20 cm) but short (<2m) and parallel to a joint trend. The younger veins are more closely associated with the altered shear zones. In the older veins, there are small clusters of tourmaline prisms. Relative to other prospects in Chester Township, the amount of sulphides is low. Like other prospects east of Lake Mesomikenda, it is possible that the mineralization in the trench may be remobilized following the emplacement of the diabase dikes. At the time of discovery (1933) channel samples reportedly returned values up to 48 g/t Au across 0.7m. Assay values for samples collected in 1979 returned values of between 1.7 g/t and 5.8 g/t Au. Grab samples collected in 1985 returned values of up to 8.6 g/t Au. Grab samples collected by the OGS in 1993 returned values of 0.07 g/t Au, 0.3 g/t Ag.

Mineral Record Details

Mineral Zones - Size and Shape

Rank: 1       Structure Type: Vein

References

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: 76  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:

Mono - Preliminary report on the Timmins-Kirkland Lake area, gold deposits file

Publication Number: OFR5467 Date: 1983

Author: Hodgson C.J.

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

Publication Number: OFR5844 Page: 114-114  Date: 1993

Author: Siragusa G.M.

Publisher Name: Ontario Geological Survey

Location:

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: 438-440  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