Ontario Geological Survey
Permanent Link to this Record:
MDI42C13SE00003
| Record Name(s) | Theresa Lake West Cu - 1983 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1991-Apr-02 |
| Date Last Modified | 2022-May-09 |
| Created By | |
| Revised By |
Primary Commodities: Copper
Township or Area: White Lake Area
Latitude: 48° 50' 5.72" Longitude: -85° 44' 11.78"
UTM Zone: 16 Easting: 592711.84 Northing: 5409874.52 UTM Datum: NAD83
Resident Geologist District: Thunder Bay South
NTS Grid: 42C13SE
Point Location Description: Outcrop along shore of Theresa Lake.
Location Method: Based on Assessment
Access Description: The Theresa Lake (West) copper occurrence is located approximately 33.8 km south-southeast of Manitouwadge on the western shore of Theresa Lake 1.8 km south of the lake's northwest corner The occurrence is accessible via motor vehicle followed by travel in boat. From Manitouwadge, proceed south along Highway 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 west side of Theresa Lake for approximately 2.7 km to the vicinity of the occurrence.
1957: Geological mapping; CPR (M. Bartley, T. Page). 1963: Unspecified work; prospector M. gray. 1964: One DDH totalling 31.4 m was drilled by an unknown company. 1964-1965: Geological mapping; ODM (V.G. Milne). Milne noted the presence of sheared rock and sulphide mineralization in the vicinity of the occurrence. 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; Carrera Resources Ltd. The copper mineralization constituting the occurrence was discovered at this time. Airborne geophysical survey (HLEM, VLF-EM, MAG); Aerodat Ltd. 1984: Geological mapping; OGS (G.M. Siragusa). 1990-1994: Prospecting and sampling; prospectors C. Bumbu and J. Martin. Reconnaissance till sampling, GSC (I.M. Kettles). Till samples collected approximately 2.6 km south of the occurrence contain anomalous amounts of Cu, Zn, Ni and Au.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 42C13SE0010A1 | 42C13SE0060 | 42C13SE0060 |
| 2.14556 | 42C13SE0004 | 42C13SE0004 |
| OP91-066 | 42C13SE0049 | 42C13SE0049 |
| 2.5746 | 42C13SE0054 | 42C13SE0054 |
| 2.8392 | 42C13SE0016 | 42C13SE0016 |
| 2.5911 | 42C13SE0040 | 42C13SE0040 |
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 Theresa Lake (West) copper occurrence is located in the Wawa Subprovince and is underlain primarily by an southeasterly- trending sequence of moderately to locally strongly foliated, locally altered, amphibolitic, mafic metavolcanic schists and gneisses which comprise a portion of the the north limb of the Schreiber-Hemlo greenstone belt (Milne 1968, Map 2147; Siragusa 1985, Map P.2738). Mineral assemblages indicate these rocks have experienced lower amphibolite facies-grade regional metamorphism (Milne 1968; Barry 1983). In the vicinity of the occurrence the greenstone belt is approximately 3.5 km wide and is bounded to the north and south by granodioritic rocks of the Dotted Lake Batholith and the Musher Lake Pluton, respectively (Milne 1968, Map 2147). The occurrence is located near the northern boundary of the belt approximately 600 m south of the contact with the Dotted Lake Batholith. A large, northeasterly- trending diabase dike is located approximately 300 m east of the occurrence (Milne 1968, Map 2147). Several narrow quartz- and feldspar-phyric felsic dikes have intruded the mafic metavolcanic rocks in the vicinity of the occurrence. Several narrow, north- and north- northeasterly-trending shear zones occur in the area (Milne 1968, Map 2147). The occurrence is located in one of these shear zones.
| Rock Type | Rank | Composition | Texture | Relationship | Mafic lava flow-unsubdivided | 1 | Sheared | Host |
|---|---|---|---|---|
| Granitoid-Unsubdivided | 2 | Q- And Fel-Phyric Dikes | Near |
| 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 | Malachite | Economic | Ore | ||||
| Quartz | Alteration | Silicification | 1 | Unknown | Disseminated |
Dec 07, 2005 (D McKay) - On the shore of Theresa Lake minor chalcopyrite and malachite and abundant pyrite occur within a thirty-foot wide zone of shearing and silicification. Eleven grab samples collected from the showing by Manwa Exploration Services Ltd. for Carrera Res. Ltd. in 1983 returned assay values which varied from 1032 to 8148 ppm Cu.
| Rank | Classification |
|---|---|
| 1 | Hydrothermal |
| Rank | Characteristic |
|---|---|
| 1 | Sheared |
Book - National Geochemical Reconnaissance Release NGR 35-1978, Regional Lake Sediment and Water Geochemical Reconnaissance Data, Ontario Eastern Shore, Lake Superior
Publication Number: GSC 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:
Book - 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 - 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: 99-103 Date: 1994
Author: McKay D.B.
Publisher Name: Ontario Geological Survey
Location:
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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