Ontario Geological Survey
Permanent Link to this Record:
MDI42D14SW00026
| Record Name(s) | Worthington Bay No. 2 - 1936, Rhyolite Zone - 1936, Yellow Rhyolite Zone - 1936, North Shores Gold Mine - 1922, Worthington Bay Base Metal - 1984 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Discretionary Occurrence |
| Date Created | 1991-Apr-01 |
| Date Last Modified | 2022-May-06 |
| Created By | |
| Revised By |
Primary Commodities: Zinc, Silver, Lead
Township or Area: Priske
Latitude: 48° 45' 58.17" Longitude: -87° 15' 46.9"
UTM Zone: 16 Easting: 480671.66 Northing: 5401494.72 UTM Datum: NAD83
Resident Geologist District: Thunder Bay South
NTS Grid: 42D14SW
Point Location Description: 5 diamond drill holes.
Location Method: Conversion from MDI
Access Description: The occurrence is located in Priske Township on the western shore of Worthington Bay, about 4 km south of Schreiber. It lies approximately 300 m south of the old mill site of the North Shores Gold Mine (Mining Location No. 2, claim map G-631, Priske Township). Access may be gained from Lake Superior or by using an old road which extends south from the old Schrieber dump (Worthington Bay Road) to the mill site of the North Shores Gold Mine, 300 m north of the occurrence.
Circa 1922: A 'silver vein' was noted by P.E. Hopkins on the shore of Lake Superior, 1.6 km south of the Longworth Silver Vein. 1936: In conjunction with ongoing development and exploration at the North Shores Gold Mine, plans were made to further investigate an extensive rhyolite unit which carried interesting gold values. 1937: Five shallow diamond drill holes were drilled on a brecciated, mineralized section of the rhyolite zone, intersecting massive sulphide sections and encouraging silver veins (aggregate length unknown). Circa 1969: C.S. Downey rediscovered the occurrence. 1969: M.W. Bartley inspected the occurrence and prepared a report for G.W. Phelps. 1981: M.W. Carter of the Ontario Geological Survey located and examined the occurrence during field mapping. 1997: Cyprus Canada Inc. conducted prospecting, sampling, and magnetic and VLF-EM geophysical surveys.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 2.17976 | 42D14SE2001 | 42D14SE2001 |
| 2.17860 | 42D14SE0104 | 42D14SE0104 |
Province: Superior
Subprovince: Wawa
Terrane: Wawa-Abitibi
Belt: Schreiber-Hemlo
Geological Age: Archean
Dec 07, 2005 (B Nelson) - The occurrence is first described in The Canadian Mining Journal (1923, p.107): On the shore of Lake Superior one mile south of the Longworth silver vein and in the strike of it is a highly altered Keewatin rhyolite carrying galena and a little silver. (Resident Geologist's Files, Schreiber Hemlo District, Thunder Bay) The Rhyolite zone is described in a 1936 North Shores Gold Mines Ltd. prospectus: ...averaging 40 feet in width and traced for a distance of approximately 3000 feet. Where sampled, this zone carries interesting gold values. The most complete and recent description of the base metal occurrence is that of *Bartley (1969): Mr. C.S. Downey of Schreiber, Ontario, (re) discovered a narrow occurrence of argentiferous galena and sphalerite in a yellowish rhyolitic formation at the water's edge of Worthington Bay. The yellowish rhyolite is distinctive and appears to be the only host for the sulphide mineralization. Whether it is a dyke or flow within a brecciated rhyolite complex is not known. Where exposed, the sulphide mineralization has a maximum width of ten inches and is composed of very narrow stringers of massive sulphides separated by apparently barren rock. The mineralization has not been traced along strike successfully. Five shallow diamond drill holes were sunk on the occurrence to determine continuity and dimensions. Because of extreme brecciation core recovery was less than 60%. The only intersection of massive sulphides occur near the collar of drill hole #1. The sections where core was not recovered may represent mineralized zones but this is conjectural.
| Rock Type | Rank | Composition | Texture | Relationship | Felsic lava flow-unsubdivided | 1 | Rhyolite | Brecciated | Host |
|---|---|---|---|---|
| Syenite | 2 | Adjacent | ||
| Mafic lava flow-unsubdivided | 3 | Adjacent |
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Galena | Economic | Ore | ||||
| 2 | Pyrite | Economic | Ore | ||||
| 3 | Sphalerite | Economic | Ore |
Dec 07, 2005 (B Nelson) - *Bartley (1969) noted the presence of sphalerite and argentiferous galena. Carter (1981a) has listed pyrite as the predominant sulphide mineral. *Bartley (1969) examined old records and concluded: Assays of sludge samples and some core sections returned low values, well below ore grade. The unsampled core, with the exception of the narrow section in Hole #1, is characteristically barren. Sporadic dissemination of fine sulphide mineralization were noted in the remaining core but the quantity is insufficient to be classed as ore material. The argentiferous galena with sphalerite occurrence on the shore of Worthington Bay is not attractive in itself because of the very limited width and accompanying low values. (Resident Geologist's Files, Schreiber Hemlo District, Thunder Bay).
Dec 07, 2005 (B Nelson) - Not known.
File - Schreiber-Hemlo Resident Geologist Mineral Deposit Files, Thunder Bay office
Publication Number: Min Dep Date:
Author:
Publisher Name:
Location: Thunder Bay RGP
Map - Nipigon-Schreiber, geological compilation series, Thunder Bay District
Publication Number: M2232 Scale: 1:253,440 Date: 1973
Author: Carter M.W., McIlwaine W.H., Wisbey P.A.
Publisher Name: Ontario Division of Mines
Location:
Mono - Mineral Occurrences in the Nipigon-Marathon Area, Volumes 1 and 2.
Publication Number: OFR5951 Page: 524-527 Date: 1996
Author: Schnieders B.R., Smyk M.C., Speed A.A., McKay D.B.
Publisher Name: Ontario Geological Survey
Location:
Compend - Report of activities, 1983, Regional and Resident Geologists
Publication Number: MP117 Page: 91 Date: 1984
Author: Kustra C.R.
Publisher Name: Ontario Geological Survey
Location:
Map - Schreiber-Duck Lake area, District of Thunder Bay
Publication Number: ARM30A Scale: 1:63,360 Date: 1998
Author: Hopkins P.E., Tanton T.L.
Publisher Name: Ontario Dept. of Mines
Location:
Map - Schreiber area, District of Thunder Bay, Ontario
Publication Number: ARM47J Scale: 1:31,680 Date: 1997
Author: Bartley M.W., Harcourt G.A.
Publisher Name: Ontario Dept. of Mines
Location:
Map - Geological series, Precambrian geology of the Schreiber area, east part, Thunder Bay District
Publication Number: P2391 Scale: 1:15,840 Date: 1981
Author: Carter M.W.
Publisher Name: Ontario Geological Survey
Location:
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