Ontario Geological Survey
Permanent Link to this Record:
MDI42C13SE00002
| Record Name(s) | Theresa Lake SE Cu-Mo - 1991 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Discretionary Occurrence |
| Date Created | 1991-Apr-02 |
| Date Last Modified | 2022-May-09 |
| Created By | |
| Revised By |
Primary Commodities: Copper, Molybdenum
Township or Area: White Lake Area
Latitude: 48° 49' 18.61" Longitude: -85° 43' 45.2"
UTM Zone: 16 Easting: 593278 Northing: 5408429 UTM Datum: NAD83
Resident Geologist District: Thunder Bay South
NTS Grid: 42C13SE
Point Location Description: Small trench
Location Method: Field Visit
Access Description: The occurrence is located approximately 35.3 km south-southeast of Manitouwadge on the eastern shore of Theresa Lake 1 km north of the Theresa Lake dam. From Manitouwadge, proceed south along Hwy 614 for approximately 48 km to the Wabikoba Lake road. Proceed northeast along the Wabikoba Lake road for approximately 13.5 km to a dam located at the south end of Theresa Lake. Proceed, via boat, north along the east side of Theresa Lake for approximately 1 km to the vicinity of the occurrence. Sulphide minerals are exposed in a small trench located adjacent to the shore.
1957: Geological mapping; CPR (M. Bartley, T. Page). 1964-1965: Geological mapping; ODM (V.G. Milne). Milne noted the presence of sheared rock and sulphide mineralization in the vicinity of the occurrecnce. 1978-1979: Lake sediment and water geochemical sampling; GSC and MNR. Samples collected from the vicinity of the occurrence contained slightly anomalous amounts of Cu. 1983: Linecutting, geological mapping, ground geophysical surveys (MAG, VLF-EM) and soil geochemical sampling; Neptune Resources Corporation. Airborne geophysical survey (HLEM, VLF-EM, MAG); Aerodat Ltd. 1984: Geological mapping; OGS (G.M. Siragusa). 1990-1993: Prospecting and sampling; prospectors C. Bumbu and J. Martin. 1991: Lithogeochemical sampling; OGS (D.B. McKay). Reconnaissance till sampling program, GSC (I.M. Kettles). Till samples collected approximately 1 km south of the occurrence contained anomalous amounts of Cu, Zn, Ni and Au.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 2.14556 | 42C13SE0004 | 42C13SE0004 |
| 2.5906 | 42C13SE0045 | 42C13SE0045 |
Province: Superior
Subprovince: Wawa
Terrane: Wawa-Abitibi
Belt: Schreiber-Hemlo
Geological Age: Archean
Metamorphism Type: Regional
Metamorphism Grade: Amphibolite
Dec 07, 2005 (D McKay) - The occurrence is underlain primarily by a southeasterly-trending sequence of moderately to locally strongly foliated , locally altered, amphibolitic, mafic metavolcanic schists and gneisses which comprise a portion of the north limb of the Schreiber-Hemlo greenstone belt. In the vicinity of the occurrence, the supracrustal sequence is approximately 1.9 km wide and is bounded to the north and south by granodioritic rocks of the Dotted Lake Batholith and the Musher Lake Pluton, respectively. The occurrence is located within a northwesterly-trending dextral shear zone near the northern boundary of the belt approximately 400 m south of the contact with the Dotted Lake Batholith.
| Rock Type | Rank | Composition | Texture | Relationship | Schist-Unsubdivided | 1 | Chl-Hb Schist | Host |
|---|
Dec 07, 2005 (D McKay) - The mafic metavolcanic rocks hosting the occurrence are typically rusty-weathering, dark green, fine- to medium-grained, locally strongly foliated and altered (silicified and epidotized), chl-hb schists.
| 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 | Pyrrhotite | Economic | Ore | ||||
| 4 | Molybdenite | Economic | Ore | ||||
| 1 | Quartz | Economic | Gangue | ||||
| 2 | Calcite | Economic | Gangue |
Dec 07, 2005 (D McKay) - The sulphides consist primarily of fine- to medium-grained, subhedral grains of pyrite and rare chalcopyrite disseminated throughout the host rock and locallized within narrow (1 to 3 mm wide) fracture fillings in association with quartz and calcite. The sulphides typically constitute <1% of the mineralized shear zone. Grab samples collected from the occurrence in 1991 by D.B. McKay for the OGS returned assay values that varied from trace to 0.005 ounce Au/ton, nil Ag, 122 to 305ppm Cu, 42 to 82 ppm Zn and 67 ppm Mo.
| Rank | Classification |
|---|---|
| 1 | Hydrothermal |
| Rank | Characteristic |
|---|---|
| 1 | Disseminated |
| 2 | Sheared |
Book - National Geochemical Reconnaissance Release NGR 35-1978, Regional Lake Sediment and Water Geochemical Reconnaissance Data, Ontario Eastern Shore, Lake Superior
Publication Number: OF 555 Date: 1979
Author: Hornbrook, E.H.W., Coker, W.B., Lynch, J.J.
Publisher Name: Geological Survey of Canada
Location: https://doi.org/10.4095/129524
Map - Geophysical Series, White Lake, Thunder Bay District, Ontario
Publication Number: Map 2168G Scale: 1:63,360 Date: 1963
Author: Geological Survey of Canada
Publisher Name: Geological Survey of Canada
Location: https://doi.org/10.4095/116493
MonoMap - Geology of the Black River area, District of Thunder Bay
Publication Number: R072 Date: 1968
Author: Milne V.G.
Publisher Name: Ontario Dept. of Mines
Location:
Map - White Lake sheet, Thunder Bay District
Publication Number: M2147 Scale: 1:31,680 Date: 1968
Author: Milne V.G.
Publisher Name: Ontario Dept. of Mines
Location:
Mono - Mineral Occurrences in the Manitouwadge Area, Volumes 1, 2 and 3
Publication Number: OFR5906 Page: 92-98 Date: 1994
Author: McKay D.B.
Publisher Name: Ontario Geological Survey
Location:
Publication - Regional Lake Sediment and Water Geochemical Reconnaissance Data, Northwestern Ontario
Publication Number: OF 2362 Date: 1991
Author: Friske, P.W.B., Hornbrook, E.H.W., Lynch, J.J., McCurdy, M.W., Gross, H., G
Publisher Name: Geological Survey of Canada
Location: https://doi.org/10.4095/132202
Map - Manitouwadge-Wawa sheet, geological compilation series, Algoma, Cochrane, Sudbury and Thunder Bay districts
Publication Number: M2220 Scale: 1:253,440 Date: 1972
Author: Milne V.G., Giblin P.E., Bennett G., Thurston P.C., Wolfe W.J., Giguere J.F., Leahy E.J., Rupert R.J.
Publisher Name: Ontario Division of Mines
Location:
Publication - Reconnaissance Geochemical Data for Till Samples from the Manitouwadge Area, Ontario
Publication Number: OF 2616 Date: 1993
Author: Kettles, I.M.
Publisher Name: Geological Survey of Canada
Location: https://doi.org/10.4095/183942
File - Schreiber-Hemlo Resident Geologist Mineral Deposit Files
Publication Number: Min Dep Date:
Author:
Publisher Name:
Location: Thunder Bay RGP
Map - Geological series, Precambrian geology, Lumby Lake area, western part, Kenora District
Publication Number: P2828 Scale: 1:15,840 Date: 1985
Author: Jackson M.C., Chevalier P.
Publisher Name: Ontario Geological Survey
Location:
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