Ontario Geological Survey
Permanent Link to this Record:
MDI000000002310
| Record Name(s) | Mud Lake Cu-Zn - 1975 |
|---|---|
| Related Record Type | |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 2019-Jul-26 |
| Date Last Modified | 2023-Jun-22 |
| Created By | |
| Revised By |
Primary Commodities: Zinc
Secondary Commodities: Copper, Silver
Township or Area: Ware
Latitude: 48° 31' 14.28" Longitude: -89° 30' 38.54"
UTM Zone: 16 Easting: 314612 Northing: 5377213 UTM Datum: NAD83
Resident Geologist District: Thunder Bay South
NTS Grid: 52A12SE
Point Location Description: Sulphide showing on north side of highway
Location Method: Field Visit with GPS
Access Description: The showing is located on Highway 102 near Mud Lake.
1980s: Amax of Canada Ltd. carried out reconnaissance mapping. No assessment files were found on record.
Province: Superior
Subprovince: Wawa
Terrane: Wawa-Abitibi
Geological Age: Archean
| Rock Type | Rank | Composition | Texture | Relationship | Felsic lava flow-unsubdivided | 1 | Rhyolite |
|---|---|---|---|---|
| Intermediate lava flow-unsubdivided | 2 | Andesite | ||
| Terrigenous-Clastic-Unsubdivided | 3 | Host |
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Pyrite | Economic | Ore | ||||
| 2 | Chalcopyrite | Economic | Ore | ||||
| 3 | Sphalerite | Economic | Ore |
Jul 26, 2019 (Therese Pettigrew) - Pyrite, minor chalcopyrite and rare sphalerite are finely disseminated throughout, and adjacent to, a sericitized northeast-trending zone of shearing hosted within chemical metasedimentary rocks interbedded with felsic and intermediate pyroclastic metavolcanic rocks of the Wawa Subprovince. This occurrence is located along Highway 102 near the south-central boundary of Ware Township. The mineralization was first uncovered during construction along Highway 102 in the mid-1970s. A grab sample collected in 1975 by staff of the Resident Geologist’s office, Thunder Bay, yielded values of 0.24% Cu, 0.87% Zn, 0.12 ounces Ag per ton and 0.005 ounces Au per ton (Fenwick and Scott, 1976). Samples of finely disseminated sulphides hosted in intermediate to felsic metavolcanic rocks collected by the field crew in the immediate vicinity of this occurrence returned values of up to 193 ppm Zn, 73 ppm Cu and 60 ppm Pb (Brown, 1995).
Date: Jun 21, 2023
Geologist: Therese Pettigrew
Notes: RGP staff members T. Pettigrew, S. Hinz, and C. Kurcinka visited and sampled the showing. Chalcopyrite and sphalerite occur within a cherty layer contained within intermediate to felsic metavolcanics. The cherty sulphide-rich horizon is about 60 cm thick, with the sulphides occurring as cm-scale bands. Small blebs of red jasper were also observed. Across the highway to the southwest (NAD83 16 U 314556 5377222), there are pillows in a mafic metavolcanic and clasts of intermediate and felsic volcanics in a volcaniclastic metasediment.
MonoMap - Precambrian Geology, Oliver and Ware Townships
Publication Number: R294 Page: 43 Date: 1995
Author: Brown G.H.
Publisher Name: Ontario Geological Survey
Location:
Article - 1975 report of the North Central Regional Geologist
Publication Number: MP064.004 Page: 46 Date: 1997
Author: Fenwick K.G., Scott J.F.
Publisher Name: Ontario Division of Mines
Location:
We are continuously updating our assessment file / technical report information. If you notice errors in the data, please contact us.
Please review our Terms of Use agreement for this data product.
For detailed information regarding this mineral record please contact the Thunder Bay South Resident Geologist District Office