Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI42D15SW00069

Record: MDI42D15SW00069

General

Commodities

Primary Commodities: Copper, Silver, Lead

Secondary Commodities: Gold, Molybdenum, Cobalt

Location

Township or Area: Tuuri

Latitude: 48° 49' .89"    Longitude: -86° 51' 59.41"

UTM Zone: 16    Easting: 509800   Northing: 5407112    UTM Datum: NAD83

Resident Geologist District: Thunder Bay South

NTS Grid: 42D15SW

Point Location Description: Location in AFRI 20000007780

Location Method: Field Visit

Access Description: The main showings (Duquette North) are located approximately 0.8 km southeast of the southern shore of Santoy Lake, about 16 km east-northeast of Terrace Bay (claim TB 658593, claim map G-635, Tuuri Township). The Duquette South occurrence is located approximately 400 m southwest of the Duquette North occurrence, along the hydro line. Access may be gained via the Santoy Lake Road which extends northeast from Highway 17 at a point about 23 km east of Terrace Bay. This road reaches the southwest bay of Santoy Lake 4.5 km north of the Highway. The showings may be reached by water and old logging roads and trails 0.8 km southeast of the lake. A hydroelectric power transmission line cuts across the claim group in an east-west manner.

Exploration History

1981-1984: Manual and mechanical surface work including trenching; L.E.Duquette. 1983, 1988: Property examination and lithogeochemical sampling; OGS Resident geologist staff. 2009: R. Renner carried out prospecting and sampling. 2010: occurrence relocated and sampled by prospector R. Renner. 2012: R. Renner carried out mapping 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 (D McKay) - The Duquette North Occurrence comprises 2 showings. The main showing occurs on the most easterly claim TB 658593. The main (or No. 1) vein, consisting essentially of white quartz, occurs on the north side of a hill at the contact with granodiorite to diorite granitic rocks and massive magnetite iron formation. The vein is exposed for 2.4 to 3 m in an east- northeast (065 -070 degrees) direction and has an almost vertical dip. (An accurate strike direction could not be established due to the magnetic interference present in the iron formation.) The vein, where it is exposed, is 1 to 1.2 m wide. Considerable oxidation (gossan) occurs on the south side of the vein adjacent to the massive magnetite and within the iron formation itself. The second showing occurs some 3 to 3.6 m down the side of the hill from the No. 1 vein. Here a system of quartz veins are hosted by diorite type granitic rocks and pink feldspar granite rocks. The quartz veins vary in width from 20 cm up to 60 and 120 cm. The quartz veining appears to be quite complex. The second vein is almost flat lying relative to the topography and the No. 1 vein. A third vein about 20 to 25 cm wide appears to be a ladder type vein between the flat-lying and vertical vein.

Lithology

Mineralization

Mineralization Comments

Jul 16, 2018 (D McKay) - Schnieders et al. (1996) describe the mineralization as follows: The ladder vein and the No. 1 vein are both mineralized with pyrite, chalcopyrite, galena and possibly molybdenite, whereas the flat-lying vein appears to be quite barren of mineralization. Near the contact with the No. 1 vein the granite is mineralized with chalcopyrite and magnetite. The magnetite rich zone has some green malachite stain associated with it. A green mica as well as hematite and limonite stain also occur in the No. 1 vein. Some samples of the quartz had some pyrolusite (MnO2) dendritic leaf pattern on them. Grab samples collected from the veins comprising the Duquette North Occurrence in 1983 and 1988 by OGS Resident Geologist staff returned assay values which varied from <0.01 to 0.02 opt Au, <0.10 to 1.50 opt Ag, 270 to 8450 ppm Cu, <10 ppm to 1.10% Pb, 8 to 700 ppm Zn, 103 to 290 ppm Mo, 20 to 130 ppm Co and <5 ppm Ni. Grab sample descriptions provided by Schnieders et al. (1996) from Duquette South indicate the quartz veins are mineralized with pyrite and chalcopyrite. These samples returned assay values which varied from 0.01 to 0.01 opt Au, 0.19 to 0.55 opt Ag and 1500 to 2760 ppm Cu.

Mineral Record Details

References

File - Schreiber-Hemlo Resident Geologist Mineral Deposit Files

Publication Number: Min Dep Date:

Author:

Publisher Name:

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: 738-741  Date: 1996

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

Publisher Name: Ontario Geological Survey

Location:

Map - Jackfish-Middleton area, Thunder Bay District

Publication Number: M2107 Date: 1967

Author: Walker J.W.R.

Publisher Name: Ontario Dept. of Mines

Location:

MonoMap - Geology of the Jackfish-Middleton area, District of Thunder Bay

Publication Number: R050 Date: 1997

Author: Walker J.W.R.

Publisher Name: Ontario Dept. of Mines

Location:

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