Ontario Geological Survey
Permanent Link to this Record:
MDI42C13SE00014
| Record Name(s) | Theresa Lake Cu - 1991 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1996-Nov-29 |
| Date Last Modified | 2023-Aug-03 |
| Created By | |
| Revised By |
Primary Commodities: Copper
Secondary Commodities: Nickel, Silver
Township or Area: White Lake Area
Latitude: 48° 50' 49.74" Longitude: -85° 44' 40.12"
UTM Zone: 16 Easting: 592111.84 Northing: 5411224.52 UTM Datum: NAD83
Resident Geologist District: Thunder Bay South
NTS Grid: 42C13SE
Point Location Description: Trench
Location Method: Field Visit
Access Description: The occurrence is located approximately 32 km south-southeast of Manitouwadge near the northwestern corner of Theresa Lake. 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 west side of Theresa Lake for approximately 4.5 km to the lake's northwest corner. Sulphide mineralization is exposed in a well marked trench (visible from the lake) which begins at the shore and extends inland for approximately 10 m.
1954-1956: Sampling; prospector S. Ciglew. 1957: Geological mapping; CPR (M. Bartley, T. Page). 1964-1965: Geological mapping; ODM (V.G. Milne). 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: Airborne geophysical survey (HLEM, VLF-EM, MAG); Aerodat Ltd. 1984: Line cutting, ground geophysical surveys (MAG, EM-VLF) and geological mapping; Cassex Resources Ltd. Geological mapping; OGS (G.M. Siragusa). Siragusa noted the presence of gossanous rock in the vicinity of the occurrence. 1985: Soil geochemical sampling, ground geophysical surveys (EM-VLF, MAG); Kilembe Resources Inc. 1991: Prospecting, sampling, trenching, stripping; prospectors C. Bumbu and J. Martin ( main showing discovered, grab samples returned assay values of up to 5700 ppm Cu). Lithogeochemical sampling; OGS (D.B. McKay). Reconnaissance till sampling program, GSC (I.M. Kettles). Till samples collected in the vicinity of the occurrence contained anomalous amounts of Cu, Zn, Ni and Au. 1996: Battle Mountain Canada Ltd. optioned the property. 1997: Battle Mountain carried out mapping and sampling.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 2.5911 | 42C13SE0040 | 42C13SE0040 |
| 2.7697 | 42C13SE0021 | 42C13SE0021 |
| 2.8794 | 42C13SE0063 | 42C13SE0063 |
| 2.14556 | 42C13SE0004 | 42C13SE0004 |
| 2.18229 | 42C13SE2003 | 42C13SE2003 |
| OP31-066 | 42C13SE0049 | 42C13SE0049 |
| 2.6768 | 42C13SE0033 | 42C13SE0033 |
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 (155 degrees/59 degrees SW), locally altered, amphibolitic, mafic metavolcanic schists and gneisses which comprise a portion of the north limb of the Schreiber-Hemlo greenstone belt. The occurrence is located along the northern edge of the belt approximately 300 m south of the contact with the Dotted Lake Batholith. Stripping and trenching has revealled a narrow zone (40 to 60 cm wide) of sulphide mineralization hosted within the mafic metavolcanic rocks. The mineralization has been traced along strike (parallel to the local foliation) for approximately 6 m. Localized silicification and sericitization are associated with the mineralized zone. Subhedral, purple garnet porphyroblasts, up to 1 cm in diameter, may locally compose up to 30% of this altered rock. It is possible that the mineralized zone may represent an altered, narrow, interflow iron formation within the mafic metavolcanic sequence. Additional stripping conducted approximately 20 m to the southwest of the main mineralized zone has exposed similar copper-bearing rocks. It is possible that a second, subparallel zone of mineralization may exist in this area.
| Rock Type | Rank | Composition | Texture | Relationship | Schist-Unsubdivided | 1 | Chl-Hb Schist | Host |
|---|---|---|---|---|
| Ironstone-unsubdivided | 2 | Host | ||
| Granitoid-Unsubdivided | 3 | Q-Fel-Phyric Dikes | Near |
Dec 07, 2005 (D McKay) - The mafic metavolcanic rocks are locally rusty-weathering, dark green, fine- to medium-grained, moderately to locally strongly foliated (155 degrees/59 degrees SW), locally altered, chl-hb schists.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Chalcopyrite | Economic | Ore | ||||
| 2 | Pyrite | Economic | Ore | ||||
| 3 | Pyrrhotite | Economic | Ore | ||||
| Garnet | Alteration | Unknown | 1 | Unknown | Disseminated | ||
| Sericite | Alteration | Unknown | 2 | Unknown | Disseminated | ||
| Quartz | Alteration | Silicification | 3 | Unknown | Disseminated |
Dec 07, 2005 (D McKay) - The sulphides consist primarily of disseminated grains to stringers and patches of po, cp and py. The sulphides typically constitute 2 to 3% of the mineralized zone but concentrations of up to 10% occur locally. Although the relative abundances vary, po generally predominates over the other sulphides. Concentrations of up to 2 to 3% cp occur locally. The mineralized zone varies from being weakly to strongly magnetic reflecting variations in po content. Sulphide secretion injection structures suggest the sulphides have undergone remobilization. Grab samples collected from the occurrence by D.B. McKay (OGS) in 1991 returned assay values that varied from nil to 0.014 ounce Au/ton, nil to trace Ag, 20 to 16920 ppm Cu, 14 to 207 ppm Zn and 20 to 1020 ppm Ni.
Mar 13, 2019 (Therese Pettigrew) - Sample 1458-B collected by Battle Mountain in 1997 returned an assay of 30,364 ppm Cu (3.04% Cu), 292 ppm Zn, 153 ppb Au, and 19.6 ppm Ag (Assessment file 42C13SE2003).
Dec 07, 2005 (D McKay) - Localized silicification and sericitization are associated with the mineralized zone. Subhedral, purple garnet porphyroblasts, up to 1 cm in diameter, may locally compose up to 30% of this altered rock. It is possible that the mineralized zone may represent an altered, narrow, interflow iron formation within the mafic metavolcanic sequence.
| Rank | Classification |
|---|---|
| 2 | Exhalative |
| 3 | Metamorphic |
| 1 | Volcanogenic |
| Rank | Characteristic |
|---|---|
| 1 | Disseminated |
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:
Book - GEOLOGICAL REPORT ON THE THERESA LK PROPERTY
Publication Number: N/A Date: 1982
Author: de Quadros, A.M.
Publisher Name:
Location: S-H RGF, Thunder Bay RGP
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: 83-91 Date: 1994
Author: McKay D.B.
Publisher Name: Ontario Geological Survey
Location:
Article - Schreiber-Hemlo Resident Geologist's District-1991
Publication Number: MP158.007 Page: 149 Date: 1997
Author: Schnieders B.R., Smyk M.C., McKay D.B.
Publisher Name: Ontario Geological Survey
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.
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:
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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