Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI000000003208

Record: MDI000000003208

General

Commodities

Primary Commodities: Gold

Location

Township or Area: Ashmore

Latitude: 49° 43' 42.45"    Longitude: -86° 50' 9.27"

UTM Zone: 16    Easting: 511826   Northing: 5508453    UTM Datum: NAD83

Resident Geologist District: Thunder Bay North

NTS Grid: 42E10NW

Point Location Description: DDH 1998P-7 from Assessment report 42E10NW2006, on the north shore of Kenogamisis Lake

Location Method: Data Compilation

Exploration History

1947-48: Little Long Lac Gold Mines carried out geological mapping, a magnetometer survey, and drilled 8 DDH totalling 1784.6 m. 1996: Peninsula Gold Explorations Ltd. optioned the property from F. Houghton and carried out magnetic, VLF-EM, and soil geochemical surveys. 1997: F. Houghton carried out prospecting. 1998: Peninsula Gold carried out stripping, trenching, and sampling, and drilled 8 DDH totalling 404.6 m. 2022: Thunder Gold Corp. carried out sampling.

Assessment Work on File

Geology

Province: Superior

Subprovince: Wabigoon

Terrane: Eastern Wabigoon

Belt: Beardmore-Geraldton

Geological Age: Archean  

Geology Comments

Oct 19, 2022 (Therese Pettigrew) - The general property geology is defined by Pye (1951: Map No. 1951-2) which shows the property to be underlain by easterly trending mafic volcanics intercalated with many thin (less than 100 m wide) interlayers dioritic to gabbroic intrusions. These rocks are cut by numerous, generally northwesterly striking narrow diabase dikes. Two easterly trending faults and one northerly trending fault are also indicated on Map 1951-2. The southeasterly striking fault apparently cuts across the area of the old trenches. The 1998 bulldozer stripping, backhoe trenching exposures and diamond drilling results by Peninsula Gold largely confirmed Pye's interpretation with the exception that dioritic to gabbroic interlayers appear to be massive coarse grained flow centres rather than intrusive units. Where observed, these coarse grain units grade into finer grain meta-andesite with no discernable chill margins (Assessment report 42E10NW2006).

Lithology

Mineralization

Mineralization Comments

Oct 19, 2022 (Therese Pettigrew) - Pyritic and arsenopyritic (at some locations), quartz and quartz-calcite impregnated east-westerly trending chloritic mafic volcanic shears occur at several locations on the property. Drill hole results indicate that magnetic pyrrhotite is also associated with the gold-bearing mineralization and is responsible, at least in some locations, for the magnetic high and low responses depicted in the magnetometer survey results. Gold enrichment is generally greatest at locations of abundant arsenopyrite mineralization. DDH 1998 P-7 was drilled to intersect a strongly magnetic E-W trending zone on the north shore of Kenogamisis Lake. A well silicified strongly magnetic pyrrhotite-arsenopyrite section from 53.9 m to 56.3 m returned the best gold values averaging (weighted average) of 3.33 g/t Au across 2.6 m, including 0.45 m of 1.8 g/t Au and >20,000 ppm As. Several other sections between 30.8 m and 50.4 m also returned significant gold values ranging from 0.65 g/t Au to 3.24 g/t Au (0.6 m). Silicification (quartz flooding) and arsenopyrite is everywhere associated with the higher gold values. The most consistent anomalous gold values are returned from locations where magnetic pyrrhotite also occurs with the quartz flooding and arsenopyrite (Assessment report 42E10NW2006). Sampling done by Peninsula Gold on earlier trenches returned up to 0.12 oz/t Au (Assessment report 42E10NW0007). Chip sampling by Thunder Gold in 2022 returned values of 9.27 g/t Au and 8.95 g/t Au from arsenopyrite-pyrrhotite mineralization associated with iron formation (Thunder Gold news release Sept 27, 2022).

Mineral Record Details

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