Ontario Geological Survey
Permanent Link to this Record:
MDI52A12SE00006
| Record Name(s) | Finmark - 1955 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1979-Jul-24 |
| Date Last Modified | 2023-Nov-02 |
| Created By | |
| Revised By |
Primary Commodities: Copper, Zinc
Secondary Commodities: Manganese
Township or Area: Dawson Road Lots
Latitude: 48° 34' 52.72" Longitude: -89° 44' 54.54"
UTM Zone: 16 Easting: 297299 Northing: 5384561 UTM Datum: NAD83
Resident Geologist District: Thunder Bay South
NTS Grid: 52A12SW
Point Location Description: Larger, western pit
Location Method: Field Visit with GPS
Access Description: Drive west from Thunder Bay along Highway 11/17 for about 40 km to Finmark Road. Turn north along Finmark Road, drive 1.8 km, continue right along Finmark/Flett Road another 850 m. Park by the hydro cut line and walk 100 m east along the cut line.
1955: Kinasco Explorations Ltd. drilled 1 short x-ray hole. 1956: Lun-Echo Gold Mines Ltd. carried out a ground magnetic survey and 17 DDH totalling 819.6 m.
Province: Superior
Subprovince: Wawa
Terrane: Wawa-Abitibi
Belt: Shebandowan
Geological Age: Archean
| Rock Type | Rank | Composition | Texture | Relationship | Mafic lava flow-unsubdivided | 1 | sheared | Host |
|---|---|---|---|---|
| Diabase | 2 | Near |
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Pyrrhotite | Economic | Ore | ||||
| 2 | Pyrite | Economic | Ore | ||||
| 3 | Chalcopyrite | Economic | Ore | ||||
| 4 | Sphalerite | Economic | Ore |
Jun 14, 2023 (Therese Pettigrew) - The two lots are underlain by vertical-dipping Archean mafic lavas cut by a Keweenawan diabase dike that strikes N70W and dips 70-75N. Along the north contact of the diabase, the mafic lavas are sheared and brecciated across widths up to 60 feet. The shattered zone is mineralized with abundant pyrrhotite, subordinate pyrite, and a little chalcopyrite. The zone is exposed by two pits near the east boundary of lot 30. In one pit, a 30-foot exposure shows 6 feet of massive pyrrhotite carrying abundant chalcopyrite; in the second pit, 60 feet to the east, a 20-foot exposure shows a deep gossan. The mineralized zone has been traced by drill holes for a length of 1,100 feet, and is shown to have an average width of about 30 feet. A grab sample of massive sulphides from the west pit was found to contain 2.44% Cu. One diamond-drill intersection obtained in hole No. 3 below this pit, indicated 2.99% Cu over a core length of 15 feet (Shklanka, 1969). The oxidized material in the shearing in the east pit assayed 0.39% Cu across 20 feet. The best drilling results by Lun-Echo Gold Mines in 1956 are as follows. DDH D-3 returned 0.66% Cu and 0.1% Zn over 3 feet from a depth of 28.5 feet and 2.19% Cu and 0.86% Zn over 5 feet from a depth of 31.5 feet. DDH D-7 returned 2.3% Cu, 0.2% Zn, and 0.27% Mn over 1 foot at a depth of 166.5 feet. DDH D-9 returned 1.22% Cu, 0.2% Zn and 0.13% Mn over 4.2 feet at a depth of 89.3 feet (Resident Geologist files, Thunder Bay RGP office).
| Commodity | Analytical Method | Digestion Method | Result | Unit | Limit | Qualifier |
|---|---|---|---|---|---|---|
| Copper | Atomic Absorption AA | Multi Acid | 5647 | ppm | 7 | |
| Copper | Atomic Absorption AA | Multi Acid | 1169 | ppm | 7 | |
| Copper | Atomic Absorption AA | Multi Acid | 4067 | ppm | 7 | |
| Lead | Atomic Absorption AA | Multi Acid | 14 | BDL | ||
| Lead | Atomic Absorption AA | Multi Acid | 14 | BDL | ||
| Lead | Atomic Absorption AA | Multi Acid | 14 | BDL | ||
| Zinc | Atomic Absorption AA | Multi Acid | 196 | ppm | 4 | |
| Zinc | Atomic Absorption AA | Multi Acid | 1055 | ppm | 4 | |
| Zinc | Atomic Absorption AA | Multi Acid | 1004 | ppm | 4 |
| Shape | Length | Thickness | Depth | Strike | Dip | Plunge | Trend | Age | Reference |
|---|---|---|---|---|---|---|---|---|---|
| 335.3 | .91 | 110 | 75 | 0 |
Date: Jun 21, 2023
Geologist: Therese Pettigrew
Notes: RGP staff members T. Pettigrew, S. Hinz, and C. Kurcinka visited the site, located the two pits, and sampled both. The western pit (NAD83 Zone 16 297299 mE 5384561mN) is about 2 m deep and 11 m long, with a contact between diabase to the south and sheared mafic volcanics to the north. The mafic metavolcanics are very altered, micaceous, with sulphide staining and disseminated the thinly layered chalcopyrite. The eastern pit (NAD83 Zone 16 297318 mE 5384554 mN) is about 1.5 m deep and 6 m long. It contained massive sphalerite within mafic volcanics.
File - Unscanned assessment file, MEI 16, 52A12SW Lun Echo Gold Mines Ltd. Finmark Property
Publication Number: Date:
Author:
Publisher Name:
Location: Assessment files, Thunder Bay RGP office
Map - Geological series, Precambrian geology, Forbes and Conmee townships area, north half, District of Thunder Bay
Publication Number: P2990 Scale: 1:15,840 Date: 1986
Author: Carter M.W.
Publisher Name: Ontario Geological Survey
Location:
Mono - Copper, nickel, lead and zinc deposits of Ontario
Publication Number: MDC012 Page: 302 Date: 1969
Author: Shklanka R.
Publisher Name: Ontario Dept. of Mines
Location:
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