Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI42D14SE00056

Record: MDI42D14SE00056

General

Commodities

Primary Commodities: Molybdenum

Secondary Commodities: Copper

Location

Township or Area: Priske

Latitude: 48° 47' 29.88"    Longitude: -87° 13' 39.97"

UTM Zone: 16    Easting: 483271   Northing: 5404318    UTM Datum: NAD83

Resident Geologist District: Thunder Bay South

NTS Grid: 42D14SE

Point Location Description: Trenches, stripped areas, diamond drill sites (approximately 7).

Location Method: Conversion from MDI

Access Description: The Prospect is located approximately 121.9 m south of Highway 17 at a point about 8.6 km west of Terrace Bay, just before the turnoff for the old Schreiber dump (n.b. The Downey East Prospect lies approximately 1300 feet (400 m) to the west) (claim map G 631, Priske Township. Access may be gained from Highway 17 and the old Schreiber dump road to within walking distance of the showings.

Exploration History

Pre-1955: Staked by various individuals but no was recorded work. 1955: The showing was acquired by C.S. Downey and optioned to Noranda Mines Limited. 1956: Noranda drilled 2 diamond drill holes (165.6 m) 1964 Staked by W. Dunham. 1965: All interest transferred to Hannam Exploration Limited under option to A.L. Parres. Vertical magnetic intensity survey conducted for Hannam Parres by Tri J Minerals Surveys Limited over a 4 claim block (main showing TB 111621). Property examined by Halet, Broadhurst and Ogden for Nor Acme Gold Mines Limited. 1968: Staked by R. Pitkanen. 1969: All interest transferred to M. Freed (Univex Exploration and Development Corporation Limited). Vertical intensity magnetometer survey conducted by Oja Limited over 26 claim group held by Univex (Pitkanen Molybdenite Property). Four diamond drill holes (390.4 m) were completed on TB 139092. 1970: One diamond drill hole, 102 m in length, was drilled on TB 204899. Geochemical survey conducted for Univex by Oja Limited. Trenching and stripping carried out on claims TB 139095 and 139094 by R. Pitkanen. 1971: Occurrence restaked by R. Pitkanen. 1972: Trenching, stripping carried out on claim TB 287071 (4769 S.R.O.). 1973: Claims lapse. 1973-1984: Staked by various individuals; no recorded work. 1984: Staked as TB 786104 and 913667 by L. McMillen and A. McLellan. 1991: Area staked and prospected by G. Daniels and J. Courtney. 1992: J. Courtney and G. Daniels conducted VLF-EM and magnetometer surveys. 1995: Area presently staked by R. Wahl, D. Kakeeway and E Beaven.

Assessment Work on File

Geology

Province: Superior

Subprovince: Wawa

Terrane: Wawa-Abitibi

Belt: Schreiber-Hemlo

Geological Age: Archean  

Geology Comments

Dec 07, 2005 (B Nelson) - *Ogden (1970) describes the geology of the main showing: The main showing is located in the northeast corner of claim TB 111621. The molybdenite and chalcopyrite bearing quartz veins of ? inches to 4 inches (1 to 10 cm) in width have been found in rock trenches with 53 feet (16.8 m) of an overlying sulphide zone, on a knob like hill, of siliceous syenite, about 50 feet (16.8 m) high. The veins are in various directions and occasionally are close enough together to form a stockwork of quartz or even to make a granite breccia. The hornblende syenite host rock is silicified near the contact so as to become a granite. Magnetite has been found closely associated with the molybdenite and chalcopyrite, particularly near the gossan zone. I believe it is associated with the overlying sulphide zone in the lavas and hence can be used to trace that zone across country. It is however a narrow feature and readings would have to be taken at 50 foot (16.8 m) intervals to detect it. Some magnetite is occasionally found with the mineralization away from the lavas, but the total content is unlikely to be sufficient to be detectable by magnetometer.

Lithology

Lithology Comments

Dec 07, 2005 (B Nelson) - The hornblende syenite host rock is silicified near the contact so as to become a granite.

Jul 03, 2018 (Therese Pettigrew) - The occurrence is a quartz-feldspar porphyry which is a marginal phase of the Terrace Bay Batholith. The porphyry is cut by aplite dykes, and by ramifying quartz veins varying from 1.3 to 10.1 cm wide in a NE-trending mineralized area about 15 m wide by about 45 m long (Carter, 1988).

Mineralization

Mineralization Comments

Dec 07, 2005 (B Nelson) - Carter (1981c) reports: Assay results from an unknown kind of sampling by Nor Acme Gold Mines Limited in 1965 ... gave 3.25 percent molybdenum and 0.01 percent copper. The best assay from diamond drill core in 1969 by Univex Exploration and Development Corporation Limited, was 0.2 percent molybdenum and 0.2 percent copper over 2 feet (0.61 m) in monzonite. *Ogden (1970) reports that: Four samples were selected for assay to see how the ratio of different metals varied with the type of occurrence. It is obvious that copper cannot be expected to exceed 0.2% and no precious metal content can be anticipated. Samples taken by Resident Geologist personnel returned: Sample 1: 0.16% Cu, 0.38% Mo from a short quartz vein in syenite with mo and cp. Sample 2: 0.08% Cu, 0.15% Mo from dark granite almost at gossan contact with mag, mo, and cp. Sample 3: 0.05% Cu, 0.03% Mo from pink feldspar phenocrysts in a quartz groundmass with mo and cp. Sample 4: 0.01% Cu, 3.25% Mo from two pieces of 3 inch wide quartz veins, with a veneer of mo along one or both sides of the vein, from two locations.

Jul 03, 2018 (Therese Pettigrew) - Mineralization in the quartz veins and the porphyry consists of pyrite, chalcopyrite, and molybdenite, as disseminated flakes, blebs, and grains, with rosettes of molybdenite (Carter, 1988).

Mineral Record Details

Site Visit Information

Date: Feb 18, 1997

Geologist: B Nelson

Notes: Resident Geologist personnel visited the occurrence June 1, 1983; September 16, 1992; July of 1994.

References

Book - Molybdenum Deposits of Canada, Geological Survey of Canada, Economic Geology Report 20, p. 81

Publication Number: EconGeol Rep 20 Date: 1963

Author: Vokes, F.M.

Publisher Name: Geological Survey of Canada

Location: https://doi.org/10.4095/103994

Map - Nipigon-Schreiber, geological compilation series, Thunder Bay District

Publication Number: M2232 Scale: 1:253,440    Date: 1973

Author: Carter M.W., McIlwaine W.H., Wisbey P.A.

Publisher Name: Ontario Division of Mines

Location:

Mono - Mineral Occurrences in the Nipigon-Marathon Area, Volumes 1 and 2.

Publication Number: OFR5951 Page: 368-371  Date: 1996

Author: Schnieders B.R., Smyk M.C., Speed A.A., McKay D.B.

Publisher Name: Ontario Geological Survey

Location:

File - Resident Geologist Mineral Deposit Files

Publication Number: Min Dep Date: 1996

Author:

Publisher Name:

Location: Thunder Bay RGP

Map - Schreiber-Duck Lake area, District of Thunder Bay

Publication Number: ARM30A Scale: 1:63,360    Date: 1998

Author: Hopkins P.E., Tanton T.L.

Publisher Name: Ontario Dept. of Mines

Location:

Mono - Geology of Schreiber-Terrace Bay area, District of Thunder Bay

Publication Number: OFR5692 Page: 170-171  Date: 1988

Author: Carter M.W.

Publisher Name: Ontario Geological Survey

Location:

Map - Schreiber area, District of Thunder Bay, Ontario

Publication Number: ARM47J Scale: 1:31,680    Date: 1997

Author: Bartley M.W., Harcourt G.A.

Publisher Name: Ontario Dept. of Mines

Location:

Map - Geological series, Precambrian geology of the Terrace Bay area, west sheet, Thunder Bay District

Publication Number: P2417 Scale: 1:15,840    Date: 1981

Author: Carter M.W.

Publisher Name: Ontario Geological Survey

Location:

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