Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI000000003172

Record: MDI000000003172

General

Commodities

Primary Commodities: Copper

Secondary Commodities: Zinc, Silver

Location

Township or Area: Gerry Lake Area

Latitude: 50° 55' 17.98"    Longitude: -93° 9' 1.02"

UTM Zone: 15    Easting: 489437   Northing: 5641124    UTM Datum: NAD83

Resident Geologist District: Red Lake

NTS Grid: 52K14NE

Point Location Description: DDH 24-1 from map in Assessment report 52K14NE2015

Location Method: Data Compilation

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, including 4 DDH totalling 1377 m on the zone. 1985: BP Resources Canada Ltd. conducted magnetometer and VLF-EM surveys. 1992: Noranda Exploration Company Ltd. drilled 4 DDH totalling 969 m, including 1 DDH totalling 334.1 m on the zone. 1993-94: Noranda and joint venture option partners Major General Resources and Pathfinder Resources drilled 14 DDH totalling 4454.8 m, including 4 DDH totalling 1023.8 m on 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

Province: Superior

Subprovince: Uchi

Terrane: North Caribou

Domain: Uchi

Belt: Confederation Lake

Geological Age: Archean  

Metamorphism Grade: U Grnst - L Amp

Geology Comments

Oct 03, 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 03, 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. The Joy Zone was discovered by shallow drilling carried out by Selco and was tested by four diamond drill holes along strike for 150 m to a depth of 90m. Mineralization is hosted by a strongly altered felsic fragmental and consists of massive to stringer sulphides dominated by pyrrhotite, chalcopyrite and minor sphalerite. Best DDH hole intersection (24-1) returned 3.01% Cu, 0.20% Zn over 5.7 m including 7.2% Cu, 0.75% Zn, and 0.84 oz/t Ag over 4.3 feet from a massive sulphide unit (75% pyrrhotite, 20% chalcopyrite, 2-4% sphalerite, 1-3% chlorite) in an intermediate tuff breccia. DDH 150-24-6 returned up to 4.22% Cu, 0.59% Zn, and 0.21 oz/t Ag over 1 foot from an intermediate tuff with 20% pyrrhotite, 20% pyrite, and 5% chalcopyrite (Assessment report 52K15NE0206). DDH 92-1 returned 4.01% Cu, 0.17% Zn, and 0.49 opt Ag over 3.35 m, including 8.45% Cu, 0.6% Zn, and 0.77 opt Ag over 0.5 m and 11.4% Cu, 0.2% Zn, 0.59 opt Ag over 0.5 m from a massive sulphide zone in a intermediate tuff (Assessment report 52K14NE8947). The Joy-Diamond Willow horizon has now been systematically tested to the -200m level for a 2.5 km strike length. Numerous small lenses of Cu +/- Zn bearing massive sulphide mineralization have been outlined within intensely altered felsic volcanic pyroclastics. The Joy and Diamond Willow Zones both remain open down plunge at the -300m level (Assessment report 52K14NE2015).

Mineral Record Details

Report an Error

We are continuously updating our assessment file / technical report information. If you notice errors in the data, please contact us.

Terms of Use

Please review our Terms of Use agreement for this data product.

Ministry Contact Information

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