Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI52K15NW00016

Record: MDI52K15NW00016

General

Commodities

Primary Commodities: Copper, Silver

Secondary Commodities: Molybdenum

Location

Township or Area: Fredart Lake Area

Latitude: 50° 58' 43.09"    Longitude: -92° 57' 16.68"

UTM Zone: 15    Easting: 503184.92   Northing: 5647449.98    UTM Datum: NAD83

Resident Geologist District: Red Lake

NTS Grid: 52K15NW

Point Location Description: stripped area

Location Method: AMIS Site Visit

Access Description: From South Bay Road via a logging road 53km from Ear Falls on east side before Otter Lake Road

Exploration History

1955-60: Split Rock Mines Ltd. - trenching, ground magnetic and electromagnetic geophysical surveys, diamond drilling (12 DDH totalling 1167 m), mapping. 1965-66: Rexdale Mines Ltd. - mapping, ground geophysics (magnetic, electromagnetic and IP surveys), trenching, DD- 59 DDH totalling 7390 m. 1968-77: Copper-Lode Mines Limited: airborne magnetic, electromagnetic, and IP surveys, DD on Mo showing (11 DDH totalling 1406 m). 1969-72: Phelps Dodge signed a suboption agreement with Copper Lode Mines and conducted trenching, geological mapping, sampling, reclogged old drill core , drilled 18 DDH totalling 4087 m, and a feasibility study. 1977: Copper Lode Mines conducted an electromagnetic survey and drilled 2 DDH totalling 305 m. 1980-1998: exploration by Noranda, Minnova, Rio Algom, Inco and Homestake. 2000: Property was optioned by Tribute Minerals Corporation from Perry English. 2002: Tribute Minerals Corporation - GPS surveys, airborne geophysics. 2003: Tribute Minerals conducted geological mapping and drilled 5 DDH totalling 1482 m.

Assessment Work on File

Lithology

Lithology Comments

Dec 16, 2015 (Therese Pettigrew) - The metavolcanic rocks at the Copper Lode A prospect consist of east-northeast-trending, amphibolitized, massive and pillowed, fine- to coarse-grained, mafic metavolcanic flows intercalated with interflow metasediments and intermediate to mafic tuff and lapilli tuff. The metasediments consist predominantly of thin, discontinuous units of recrystallized, chert-magnetite-amphibole iron formation. The metavolcanic rocks are commonly biotitic, and contain variable amounts of garnet and green-black amphibole. Intermediate metavolcanic rocks are also variably sericitized (Fenwick et al., 1991).

Mineralization

Mineralization Comments

Nov 20, 2014 (A Wilson) - Blebs, veinlets and disseminations of pyrrhotite, pyrite and chalcopyrite locally replace mafics in schists, amphibolites and tuffs. Molybdenite in quartz vein within granite and along diorite contacts.

Dec 16, 2015 (Therese Pettigrew) - The east-northeast-trending A zone has been traced for a strike length of approximately 400 m. The zone consists of sulphide mineralization which is closely associated with numerous subparallel horizons of chert-magnetite-amphibole iron formation intercalated with amphibolitized mafic flows and thinly bedded, intermediate to mafic tuffs. The iron formation is also interlayered with units of coarse-grained, dark green pyroxene and anthophyllite which may represent metamorphosed calcareous metasediments. The rocks within the mineralized zone are highly strained, sheared, fissile, boudinaged, and folded and trend 065 to 080 degrees with a strong mineral lineation plunging 080 degrees to the southwest. Dextral, northwest-trending faults intersect the mineralized zone and displace chert-magnetite-amphibole units. The units of chert-magnetite-amphibole iron formation are commonly 1.8 to 4.5 m wide and contain contorted, discontinuous, and Z-drag folded layers of magnetite which are less than 2.5 cm wide. The magnetite is interlayered with boudinaged and brecciated chert layers which are less than 5 cm to 0.6 m wide. The chert is rusty-red, recrystallized, and sugary-textured. The chert also contains sheared and fissile layers of green, fibrous anthophyllite, black amphibole, calcite, and/or coarse-grained biotite. Discontinuous stringers, pods, and lenses, consisting of pyrrhotite, pyrite, and variable amounts of chalcopyrite, occur almost exclusively in horizons of iron formation. Some pyrite and pyrrhotite nodules occur in magnetite-rich layers within the chert. The sulphides are also disseminated throughout the amphibolitized mafic flows and intermediate to mafic tuffs adjacent to the iron formation. The metavolcanic rocks commonly are composed of coarse-grained black biotite, black amphibole, and large red-brown garnets up to 2 cm in size. Chalcopyrite is typically concentrated within the biotite-rich rocks. Sulphides also occur along fractures and foliation planes in intensely deformed rocks. Thin discontinuous units of massive pyroxene are interlayered with the chert-magnetite-amphibole iron formation. These units contain massive aggregates of dark green, euhedral diopside crystals up to 30 cm long and 8 cm wide, with interstitial quartz and calcite. Thin layers of massive anthophyllite and magnetite occur throughout the diopside units as well as minor amounts of disseminated chalcopyrite, pyrite, pyrrhotite, and galena. A 15 m wide zone of pervasive silicification and abundant white quartz veining occurs within the diopside unit at the extreme northeastern end of the A zone. The silicification does not appear to be associated with mineralization. Three grab samples taken by J.R. Parker from trenches on the Copper Lode A zone were found to contain 40 ppb Au, 3980 ppm Cu, and 700 ppm Zn; 730 ppb Au, 11.29fc Cu, and 2680 ppm Zn; and 200 ppb Au, S.8% Cu, and 760 ppm Zn. Diamond drilling has indicated that the Copper Lode A zone consists of numerous narrow, discontinuous, en echelon and subparallel sulphide zones. Some of the best drill intersections from the A zone, reported by Rexdale Mines Ltd. assayed 5.24% Cu and 5.45 ounces Ag per ton across 6 feet; 2.94%Cu and 2.43 ounces Ag per ton across 18 feet; 2.23% Cu and 3.32 ounces Ag per ton across 37.8 feet; and 1.89% Cu and 3.10 ounces Ag per ton across 57.2 feet (Fenwick et al., 1991).

Mineral Record Details

References

Article - Red Lake District

Publication Number: MP033.001 Page: 24  Date: 1997

Author: Riley R.A.

Publisher Name: Ontario Dept. of Mines

Location:

Mono - Copper, nickel, lead and zinc deposits of Ontario

Publication Number: MDC012 Page: 174  Date: 1969

Author: Shklanka R.

Publisher Name: Ontario Dept. of Mines

Location:

Compend - Annual report of Resident Geologists Section, Geological Branch, 1970

Publication Number: MP046 Page: 79  Date: 1971

Author: Guillet G.R.

Publisher Name: Ontario Dept. of Mines and Northern Affairs

Location:

Compend - Report of activities, 1990, Resident Geologists

Publication Number: MP152 Page: 56-58  Date: 1991

Author: Fenwick K.G., Newsome J.W., Pitts A.E.

Publisher Name: Ontario Geological Survey

Location:

Map - Snakeweed Lake area (Fredart-Whitemud lakes area), Patricia Portion, District of Kenora

Publication Number: P0349 Scale: 1:15,840    Date: 1997

Author: Fenwick K.G.

Publisher Name: Ontario Dept. of Mines

Location:

Publication - Canadian Mineral Deposits not Being Mined in 1989

Publication Number: MR 223 Page: ONT-523  Date: 1990

Author:

Publisher Name: Energy Mines and Resources Canada

Location:

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