Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI000000002347

Record: MDI000000002347

General

Mineral Record Identification
Record Name(s) Minnitaki Redpine Bay - 1930
Related Record Type
Related Record(s)
Record Status Occurrence
Date Created 2019-Oct-15
Date Last Modified 2023-Aug-03
Created By
Revised By

Commodities

Primary Commodities: Gold



Location

Township or Area: Kabik Lake Area

Latitude: 49° 53' 39.06"    Longitude: -92° 10' 24.42"

UTM Zone: 15    Easting: 559366   Northing: 5527193    UTM Datum: NAD83

Resident Geologist District: Kenora

NTS Grid: 52F16NE

Point Location Description: Map on p. 75 of OGS publication MP158

Location Method: Data Compilation



Exploration History

1930s: Property was owned by Minnitaki Mining Syndicate. Trenching and sampling was carried out. 1991: OGS staff from the RGP office prospected the area and rediscovered the showing. No assessment reports were found on file.


Geology

Province: Superior

Subprovince: Wabigoon

Geological Age: Archean  



Lithology

Lithology Data
Rock Type Rank Composition Texture Relationship
Quartz-Feldspar Porphyry 1 Quartz-Feldspar Host
Mafic lava flow-unsubdivided 2 Adjacent

Lithology Comments

Oct 15, 2019 (Therese Pettigrew) - A description of the property, from a newspaper clipping in the Sioux Lookout RGP files, reads as follows: “An important gold find was made last fall in the Sioux Lookout area unusually significant in the sense that it may become the turning point in the hitherto colourless story of the old Minnitaki gold belt. The details to hand are from members of the Minnitaki Mining Syndicate -- Sioux Lookout citizens who control the discovery made by a local prospector named R. McKenna and his partner. The discovery claim is on a peninsula striking northeast as it separates Red Pine Bay [sic] from Southwest Bay at the southern extremity of Minnitaki Lake. The distance from Sioux Lookout is about 22 miles about a four hour "kicker" run without a portage. Dr. M.E. Hurst's recently produced geological map of the district shows the greenstones and Temiskaming sediments forming a contact zone partly down the centre of this long promontory. The map does not show the numerous porphyry dikes that intrude these formations. The particular porphyry dike in which the gold was found in two places widely apart is situated about half way down the peninsula on the west shore of Red Pine Bay. Where the find was made the dike is about 200 feet wide and traceable across two claims. Spectacular samples of gold were secured from a group of quartz stringers near the footwall of the dike. A single shot revealed much gold. The second discovery was about 300 feet northeast of the first find. It consisted of visible gold in a six inch stringer of quartz. The dike itself which is a feldspar porphyry is mineralized with iron pyrites in coarse cubes, but fine sulphides appear two feet below the surface. Stringers of quartz appear throughout the dike, or wherever the surface has been exposed in an area having an average overburden of three to four feet. To date, only two trenches have been run in an effort to reach the contact between the porphyry and the sediments. Surrounding rocks show a decisive shearing movement Even where no quartz appears there is in evidence much general mineralization iron pyrites, chalcopyrite, and sphalerite. Where exposed the dike is sheared and oxidized. Iron formation outcrops at various points within the eight claims staked. Rhyolite appears on the north claims and more porphyry dikes show up in the sediments. The Algoma granites lie to the east of Red Pine Bay. Between the granite and the property the rocks indicate a deep shearing movement. Aplite dikes, narrow bands of iron formation and other rock phases are much in evidence” (Janes et al., 1992; Kenora office RGP Mineral deposit files). The following description is taken from Janes et al. (1992): “The writers traversed north along the approximate west boundary of mining location BJ11. About 300 m inland is a large outcrop of mafic metavolcanics. About 100 m east of that outcrop is an outcrop of fresh-looking, quartz-feldspar porphyry on the north side of a ridge of mafic metavolcanics. Northeast along the contact between the porphyry and the metavolcanics are the 2 trenches referred to in the earlier quoted article. The trenches, about 8 m apart, trend north. The west trench extends from well into the mafic metavolcanics to a point over 70 m north which is down a slope and into a ravine. The quartz-feldspar porphyry in the trench has a width of at least 60 m. At the northernmost exposure in the trench, the quartz-feldspar porphyry is well sheared and carbonatized. Locally, it contains an apple-green mica and up to 1% disseminated pyrite.”




Mineralization

Mineralization and Alteration
Rank Mineral Name Class Economic Mineral Type Alteration Mineral Type Alteration Ranking Alteration Intensity Alteration Style
1PyriteEconomicOre

Mineralization Comments

Oct 15, 2019 (Therese Pettigrew) - OGS staff collected 3 samples from this location. The best result returned 645 ppb Au (Janes et al., 1992).



Mineral Record Details

References

Article - Sioux Lookout Resident Geologist's District-1991

Publication Number: MP158.004 Page: 75-77  Date: 1997

Author: Janes D.A., Seim G.Wm., Storey C.C.

Publisher Name: Ontario Geological Survey

Location:


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For detailed information regarding this mineral record please contact the Kenora Resident Geologist District Office