Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI42D14SE00042

Record: MDI42D14SE00042

General

Commodities

Primary Commodities: Gold

Secondary Commodities: Copper, Zinc, Silver, Sulphur/Pyrite

Location

Township or Area: Priske

Latitude: 48° 50' 28.12"    Longitude: -87° 14' 25.39"

UTM Zone: 16    Easting: 482361.66   Northing: 5409824.76    UTM Datum: NAD83

Resident Geologist District: Thunder Bay South

NTS Grid: 42D14SE

Point Location Description: Shaft, several possible adits/tunnels.

Location Method: Conversion from MDI

Access Description: The property is located west of the Schreiber Pyramid property on Big Duck Creek in Priske Township, about 3.2 km northeast of Schreiber (claims TB 28231, 28232 and 35349, claim map G 631, Priske Township). Access may be gained using a bush road which extends north and east from Schreiber, past the edge of Cook Lake.

Exploration History

1921: Rich veins were discovered southeast of Cook Lake. 1934: Claims were staked by D.E. Johnston, K.J. McKenna, and D.T. McCann. 1936: Cook Lake Gold Mines Ltd. was incorporated to develop the Johnston-McKenna property. Camp buildings and a mining plant were constructed; a tunnel was excavated on TB13179; surface trenching carried out. 1937: A tunnel was initiated in Dec. 1936 to intersect the No. 4 vein; 23 m of drifting carried out; 2-compartment vertical shaft sunk; 32 ton bulk sample from the Johnston-McKenna and McKenna-McCann properties mined and shipped for treatment. Yield was 0.82 oz/ton Au. Work was discontinued and the equipment was transferred to the McKenna-McCann property. 1940: 17 claims cancelled. 1946-1958: Various claims were cancelled, staked, restaked, etc. 1959: P.S. Broadhurst of Mina-Nova Mines recommended an exploration program, but none was implemented. 1960-1984: Various companies held the ground; claims cancelled and restaked etc. Some minor drilling and stripping were performed. 1985: Pat Mikko Resources optioned the property, and conducted stripping, trenching, sampling, site development and mill development on the property. 1991: Line cutting, stripping, trenching and sampling was conducted by Pat Mikko Res. 2016: First Minerals Exploration Ltd. carried out prospecting and sampling.

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) - The general geology consists of predominately mafic, spherulitic pillowed metavolcanic flow rocks, and minor iron formation which have been intruded by metagabbro and metadiorite dykes, lamprophyre dykes and small quartz feldspar porphyry stocks or dykes. Pillow cusps indicate dips to the northeast. Air photo interpretation and field evidence suggest several major northwest trending lineaments, including a Big Duck Creek Hays Lake lineament, Hollinger Lake lineament and a Croft Lake Lamont Lake lineament. A secondary or minor fault set trending southwest northeast, and occasionally north south is present within this area. This conjugate fault set appears common in areas of gold mineralization. The northwest trending shear zones are sub parallel to the long axis of the stretched pillows. An approximate 5 x 3 km rectangular parcel of land in this area, bounded by Croft Lake Lamont Lake lineaments, is highly recommended for prospecting and exploration. Gold bearing quartz veins occupy shear zones and faults with predominately mafic, spherulitic pillowed flows. Minor metagabbroic, metadiorite and lamprophyre dykes and quartz feldspar porphyry and stocks intrude the metavolcanic rocks. Northwest trending shear zones and lineaments are present and well developed throughout the area, however, a secondary or conjugate fault set, trending west southwest was also observed. Numerous quartz veins were observed on the property, including several veins in the northeast section of claim TB 13128 or 35349. These veins were originally numbered No. 1 to No. 4. The No. 1 to No. 3 veins are represented by the narrow quartz veins, either singular or composite in nature. They strike to the northwest 280 degrees 330 degrees and dip from 70 degrees SW to vertical. The veins observed vary in width form 1 to 2 cm stringers up to 0.5 m, but likely average 15 to 20 cm in width.

Lithology

Lithology Comments

Dec 07, 2005 (B Nelson) - The No. 4 vein or Main vein occupies a fault or shear zone striking 220 degrees to 270 degrees and dips 35 degrees to 55 degrees NW. This vein has been interpreted by past workers to be folded or to represent a separate main vein. These past workers also suggested that the northwest trending veins were secondary a tension gash veins. Observations by the author indicate that the northwest trending veins are the primary set of veins, and that the southwest west trending No. 4 vein, is a secondary, conjugate vein occupying a later fault. Thus the north west trending veins have a polyphase emplacement, during this period deformation produced southwest trending faults which were sealed by one phase of the vein emplacement. This is supported by the presence of crack seal and brecciated textures, and by displacement of some of the vein systems.

Mineralization

Mineralization Comments

Dec 07, 2005 (B Nelson) - Beaton (1937) estimated the grade on a section of the No. 4 vein (Cook Lake Gold Mines Main Vein) as: ... a zone 91 feet long having an average width of 23 inches has been well exposed and in this zone I would estimate an average tenor of the quartz to exceed $60.00 per ton*. Veins of this nature are exceedingly difficult to evaluate, as the gold is not evenly distributed throughout the vein, but concentrated in patches throughout the vein and channel sampling would only give an approximate, or even very erroneous, value of the ore. However, there is enough visible gold present to safely make the above estimate, and the sampling done so far has confirmed this figure. Past reports indicate numerous occurrences of high grade float material, interpreted to be close to their original source location. Grab samples collected by Mina-Nova Mines Limited from vein on TB13127 (TB 28231) returned results including the following: Southwest Vein: 1.98 oz.ton Au from quartz with very fine mineralization (free gold not positively identified). 11.38 oz/ton Au from quartz, possible visible gold noted. 30.30 oz/ton Au from quartz. No V.G. noted. Main Vein: 9.30 oz/ton Au from quartz; native gold indicated.

Jun 22, 2018 (Therese Pettigrew) - During the 2016 prospecting and sampling program, Significant gold assay results were returned from the No. 4 vein. These include: Grab Sample K006931 with 27.4 g/t Au from a weakly strained mafic metavolcanic rock containing several quartz veinlets from the hanging wall of the No.4 vein; and Grab sample K006934 with 137 g/t Au from a selective grab sample of the No.4 vein (AFRI 2.57246).

Alteration Comments

Dec 07, 2005 (B Nelson) - Accessory minerals (in the No. 4 Vein) include chlorite, epidote, sericite, hematite, carbonate, and abundant tourmaline in places. The vein does not display a crack seal nature and is generally quite barren. Minor extensional veins were observed.

Mineral Record Details

Site Visit Information

Date: Feb 14, 1997

Geologist: B Nelson

Notes: Resident Geologist personnel visited the site June 18, 1985; July 9, 1985; July 16, 1985; August of 1986; November of 1986; June of 1993. Notable results of sampling include: 0.78 oz/ton Au from the main vein, adit area, in fine grained quartz. 2.64 oz/ton Au from a sulphide rich quartz veinlet with V.G. 6.56 oz/ton Au from the main No. 4 vein--V.G. noted. 8.35 oz/ton Au from the 1st pit, No. 1 Vein, near road onTB13128, E of dump. The sample also assayed 1.35 oz/ton Ag. 1.44 oz/ton Au from northwest trending crack-seal veins on TB13128.

References

Book - Canadian Mines Handbook 1960-61, Mina-Nova

Publication Number: CMH 1960-61 Page: 163  Date: 1961

Author:

Publisher Name: Northern Miner Press

Location: Thunder Bay RGP

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: 268-283  Date: 1996

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

Publisher Name: Ontario Geological Survey

Location:

Book - Canadian Mines Handbook 1966-67, Bar-Manitou

Publication Number: CMH 1966-67 Page: 38  Date: 1967

Author:

Publisher Name: Northern Miner Press

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:

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:

Part - The southwestern part of the Schreiber area

Publication Number: ARV47-09.001 Page: 27-28  Date: 1998

Author: Harcourt G.A.

Publisher Name: Ontario Dept. of Mines

Location:

Compend - Report of Activities 1992, Resident Geologists

Publication Number: MP161 Page: 125, 131-132  Date: 1993

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