Ontario Geological Survey
Permanent Link to this Record:
MDI41O16NW00035
| Record Name(s) | Thorne - 1933, Horwood Peninsula - 1936, Horwood Lake - 1984 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1999-Nov-08 |
| Date Last Modified | 2023-Mar-27 |
| Created By | |
| Revised By |
Primary Commodities: Gold
Township or Area: Horwood
Latitude: 47° 57' 59.95" Longitude: -82° 18' 50.42"
UTM Zone: 17 Easting: 401918.872 Northing: 5313429.317 UTM Datum: NAD83
Resident Geologist District: Timmins
NTS Grid: 41O16NW
Point Location Description: Deep trench at hill crest.
Location Method: Field Visit with GPS
Access Description: The occurrence is located at the southern tip of the Horwood Peninsula and access is best via boat from the landing at the north end of Horwood Lake. The showing is up a steep hill along the southern shore of the peninsula about 300 m east of a cabin at the point.
1933: claims staked by A. E. Jerome for G. A.Thorne. These claims covered some quartz veins which reportedly contained visible gold. 1980: Northgate Exploration - mag and VLF-EM surveys, humus geochemistry. 1989: OGS mapped and sampled two trenches.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 63.3957 | 41O16NW0023 | 41O16NW0023 |
| 2.4419 | 41O16NW0025 | 41O16NW0025 |
Province: Superior
Subprovince: Abitibi
Terrane: Wawa-Abitibi
Belt: Swayze
Geological Age: Neoarchean Geochronological Age: 2700 MA Geochron. Age Ref.: GOO VOL 1
Metamorphism Type: Regional
Metamorphism Grade: Greenschist
Dec 07, 2005 (A Wilson) - The mineralization is hosted in a narrow shear zone with shart contacts with the adjacent undeformed rocks (<10 cm). Unlike the adjacent pillows, the shared material is rusty and contains carbonate and sericite alteration.
| Rock Type | Rank | Composition | Texture | Relationship | Vein | 1 | Quartz Carbonate Vein | Host |
|---|---|---|---|---|
| Vein | 2 | Quartz Carbonate | Host | |
| Schist-Unsubdivided | 3 | Host | ||
| Mafic pillowed flow | 4 | Basalt, Tholeiitic Mg | Pillowed | Near |
Dec 07, 2005 (A Wilson) - The surrounding rocks are pillowed and massive flows. The pillows are locally very large (1.5 x 3 m). Relative to the surrounding dark green iron tholeiitic basalts, the pillowed flows at the showing which extend to the west, are conspicously light green to grey and are Mg tholeiitic basalts. In the area of ths showing, these flows trend to the northwest and dip steeply to the south.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Gold | Economic | Ore | ||||
| 1 | Pyrite | Economic | Gangue | ||||
| 2 | Pyrrhotite | Economic | Gangue | ||||
| 3 | Chalcopyrite | Economic | Gangue | ||||
| Muscovite | Alteration | Potassic | 1 | Weak | Replacement |
Dec 07, 2005 (A Wilson) - Visible gold was reported at the site at the time of staking. Within the shear zone, which may have contained sulphides, are a number of axial quartz veins. These veins are lenticular and in form, locally banded parallel to the shear and contain very fine pyrite sparsely disseminated through the vein. The veins presently exposed are less than 20 cm thick. Work by Siragusa (1991) has shown that the gold mineralization extends into the sheared country rock adjacent to the veins. Grab samples collected by the OGS returned values up to 12 g/t in altered basalts adjacent to a quartz muscovite vein.
| Rank | Classification |
|---|---|
| 1 | Mesothermal |
| Rank | Characteristic |
|---|---|
| 1 | Vein |
| Shape | Length | Thickness | Depth | Strike | Dip | Plunge | Trend | Age | Reference |
|---|---|---|---|---|---|---|---|---|---|
| Tabular | 137 | 1 | 5 | 294 | 70 |
Map - Rush Lake Sheet, Sudbury District, Ontario
Publication Number: Map 290A Scale: 1:63,360 Date: 1933
Author: Bannerman, H M
Publisher Name: Geological Survey of Canada
Location: https://doi.org/10.4095/107624
Publication - Mineral deposits of the eastern part of Rush River map-area, Woman River district, Ontario; Geological Survey of Canada, Summary Report 1928, pt. C
Publication Number: Sum Rep 1928 C Page: 17-27 Date: 1930
Author: Bannerman, H M
Publisher Name: Geological Survey of Canada
Location: https://doi.org/10.4095/102074
Map - Geology, Swayze greenstone belt, Rush Lake, Ontario
Publication Number: OF3384c Scale: 1:50,000 Date: 1999
Author: Heather, K B; Shore, G T
Publisher Name: Geological Survey of Canada
Location: https://doi.org/10.4095/210451
Publication - Rush Lake area, Sudbury District, Ontario; Geological Survey of Canada, Summary Report 1933, pt. D
Publication Number: SR33-D Page: 38-82 Date: 1934
Author: Bannerman, H W
Publisher Name: Geological Survey of Canada
Location: https://doi.org/10.4095/102113
Part - Geology of the Horwood Lake area
Publication Number: ARV46-02 Date: 1997
Author: Harding W.D.
Publisher Name: Ontario Dept. of Mines
Location:
Publication - Gold Occurrences of Ontario East of Lake Superior; Geological Survey of Canada, Memoir 192
Publication Number: GSC Mem 192 Date: 1936
Author: Kindle, E.D.
Publisher Name: Geological Survey of Canada
Location: https://doi.org/10.4095/100824
Part - Horwood Lake area
Publication Number: ARV44-07.002 Date: 1997
Author: Laird H.C.
Publisher Name: Ontario Dept. of Mines
Location:
Publication - Sudbury Timmins Algoma Mineral Program, Project 1: mineral inventory of the Sudbury-Timmins-Sault Ste. Marie region, Ontario
Publication Number: GSC OF 1087 Date: 1985
Author: Rose, D.G.
Publisher Name: Geological Survey of Canada
Location: https://doi.org/10.4095/129999
Mono - Geological and geochemical setting of 3 gold occurrences in the Horwood Lake area, central Swayze belt
Publication Number: OFR5803 Date: 1991
Author: Siragusa G.M.
Publisher Name: Ontario Geological Survey
Location:
MonoMap - Mineral Prospects of the Swayze Greenstone Belt (Volume 1, Parts of NTS 41 O and Volume 2, Parts of NTS 41 P, 42 A and 42 B)
Publication Number: OFR5912 Page: 272-284 Date: 1995
Author: Fumerton S.L., Houle K.A.
Publisher Name: Ontario Geological Survey
Location:
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