Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI000000003174

Record: MDI000000003174

General

Commodities

Primary Commodities: Copper

Secondary Commodities: Zinc, Silver

Location

Township or Area: Gerry Lake Area

Latitude: 50° 55' 24.08"    Longitude: -93° 7' 24.28"

UTM Zone: 15    Easting: 491326   Northing: 5641309    UTM Datum: NAD83

Resident Geologist District: Red Lake

NTS Grid: 52K14NE

Point Location Description: Map on last page of assessment report 52K14NE2015 showing DDH J-94-18

Location Method: Based on Assessment

Exploration History

1976-78: Selco Mining Corp. Ltd. carried out line cutting and mag and EM surveys. 1978: Selco drilled 10 DDH totalling 2867 m. 1985: BP Resources Canada Ltd. conducted magnetometer and VLF-EM surveys. 1992: Noranda Exploration Company Ltd. drilled 4 DDH totalling 969 m. 1993-94: Noranda and joint venture option partners Major General Resources and Pathfinder Resources drilled 14 DDH totalling 4454.8 m, including 1 DDH totalling 347 m that resulted in the discovery of the zone, and conducted borehole EM surveys. 2021: Trillium Gold Mines Inc. carried out a spatiotemporal geochemical hydrocarbon soil sampling program.

Assessment Work on File

Geology Comments

Oct 04, 2022 (Therese Pettigrew) - The Joy property is generally overlain by overburden cover up to 30 m in thickness. Interpretation of geology is based largely on ground geophysics, diamond drilling, and limited outcrop on the northern portion of the property. The Joy Property is underlain by an east-west to east-northeast trending, steeply south dipping sequence of volcanic rocks which consist of undifferentiated, strongly altered and metamorphosed felsic to intermediate pyroclastics and subvolcanic quartz-feldspar porphyritic intrusives. This sequence is underlain to the north by basalt flows, and has been intruded to the south by regional granitic to granodiorite intrusives. The volcanic rocks are representative of the third cycle of volcanism of the Confederation Lake Volcanic Belt. The volcanic rocks exhibit widespread hydrothermal alteration mineral assemblages consisting of chlorite-biotite-sericite-cordierite garnet ± anthophyllite. The observed alteration mineral assemblages are consistent with hydrothermally altered volcanics typical of a VMS mineralizing environment which have been overprinted by a strong (ie upper greenschist-lower amphibolite) regional metamorphic event (Assessment report 52K14NE2015).

Lithology

Mineralization

Mineralization Comments

Oct 04, 2022 (Therese Pettigrew) - The Joy property host several zones of Cu-Zn rich massive to stringer sulphide mineralization localized along at least two stratigraphic horizons within the felsic pyroclastic volcanics. The northern horizon hosts the Joy-Diamond Willow-Creek zones over a 2.3 km strike length while the southern horizon hosts the South and Caravelle zones. The former is characterized by Cu-rich Zn mineralization, while the latter is characterized by Zn-rich mineralization with little or no Cu enrichment. A 0.95 m thick semi-massive sulphide zone in DDH J-94-18 at 269.6 m depth returned 2.33% Cu, 0.27% Zn, and 0.2 opt Ag. The mineralization in semi-massive pyrrhotite (15-20% pyrrhotite blobs) with 2-3% chalcopyrite, 2% pyrite cubes and blebs, and trace sphalerite. Immediately above the massive sulphide section is 1 m of fine ash with moderate biotite and weak chlorite. Above the ash is a 60 m interval of felsic tuff. Below the massive sulphide section is a quartz-feldspar porphyry (Assessment report 52K14NE2015).

Mineral Record Details

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Ministry Contact Information

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