Ontario Geological Survey
Permanent Link to this Record:
MDI52J14NE00009
| Record Name(s) | Island 17 - 1980 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 2001-Feb-16 |
| Date Last Modified | 2022-Sep-27 |
| Created By | |
| Revised By |
Primary Commodities: Gold
Secondary Commodities: Silver
Township or Area: Trist Lake Area
Latitude: 50° 57' 28.13" Longitude: -91° 2' 4.39"
UTM Zone: 15 Easting: 638034.17 Northing: 5646972.84 UTM Datum: NAD83
Resident Geologist District: Thunder Bay North
NTS Grid: 52J14NE
Point Location Description: Triangle symbol on northwest shore of Island 17 from AFO 52J14NE-0015-B1 Noranda map
Location Method: Based on Assessment
Access Description: Access is by boat to the southwest bay of Lake St. Joseph. Island 17 is the small (approx. 500m long) island 800m southeast of Eagle Island.
Noranda Exploration Company Ltd. conducted geophysical (magnetic and electromagnetic) and geological surveys over their Island 17 Property consisting of 7 claims (Pa 376756 to 62 inclusive) in 1978. Their assessment file (52J14NE0015-B1) map indicates anomalous gold (.32 opt) and silver (.28 opt) to the west of a 'Noranda trench' on the northwest shore of Island 17. Noranda was exploring for base metal mineralization presumably as a follow-up to their regional airborne survey completed by Questor. Roy Rupert of Sault Ste. Marie completed a sampling program over three island claims (Pa 816588,816601, 816591) that comprised his Lake St. Joseph Property in 1984. Samples LSJ-8 and LSJ-9 returned .076 and .042 oz/ton respectively. These samples were taken from the same area that Noranda had indicated on their 1978 geological map.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 52J14NE-0015B / 2.3253 | 52J14NE9436 | 52J14NE9436 |
| 52J14NE18 | 52J14NE9437 | 52J14NE9437 |
| 52J14NE0012A1 | 52J14NE0016 | 52J14NE0016 |
| 52J14NE0015A1 | 52J14NE0001 | 52J14NE0001 |
| 63.3253 | 52J14NE0002 | 52J14NE0002 |
Province: Superior
Subprovince: Uchi
Terrane: North Caribou
Domain: Uchi
Belt: Lake St. Joseph
Geological Age: Neoarchean
Aug 23, 2007 (Mark Puumala) - This occurrence is based on the reported presence of anomalous gold and silver mineralization within suphide facies iron formation at the northwestern end of Lake St. Joseph Island 17 (Berger 1977). Berger (1977) indicates that the Island 17 area is underlain by a complex assemblage of volcanic and sedimentary rocks. The northwestern portion of the island was mapped by Berger (1977) as consisting of a mixture of sulphide and oxide facies iron formation. The iron formation sequence is described as consisting largely of graphitic argillite, chert and intra-formational chert breccia with 5 to 20% pyrite in stringers and pods that are randomly distributed parallel to foliation. The central portion of the island was mapped as felsic metavolcanics, while the southeastern portion is indicated to be underlain by intermediate volcanics. The interpreted stratigraphic contacts strike approximately northeast. A significant north-south striking shear zone is also indicated to be located immediately to the west of Island 17. An assay of 0.32 oz/ton Au and 0.28 oz/ton Ag was reported from a grab sample of sulphide facies iron formation mineralized with minor pyrrhotite, arsenopyrite and ankerite (Berger 1977). Two grab samples (LSJ 008 and LSJ 009) collected in the same area by R.J. Rupert in 1984 (AFRI# 52J14NE9437) were reported to have assayed 0.076 and 0.042 oz/ton. A third sample (LSJ 011) collected by Rupert but not assayed, was indicated to possibly contain visible gold.
| Rock Type | Rank | Composition | Texture | Relationship | Sulphide Ironstone | 1 | Sulphide And Oxide Facies | Host |
|---|---|---|---|---|
| Felsic lava flow-unsubdivided | 2 | Near | ||
| Intermediate lava flow-unsubdivided | 3 | Near |
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Pyrite | Economic | Ore | ||||
| 2 | Pyrrhotite | Economic | Ore | ||||
| 3 | Arsenopyrite | Economic | Ore | ||||
| Ankerite | Alteration | 1 |
| Rank | Classification |
|---|---|
| 1 | Lode (Gold) |
| Rank | Characteristic |
|---|---|
| 1 | Stratabound |
Map - Western part of Lake St. Joseph, districts of Kenora, Thunder Bay and Patricia, Ontario
Publication Number: ARM31E Scale: 1:63,360 Date: 1997
Author: Bruce E.L.
Publisher Name: Ontario Dept. of Mines
Location:
MonoMap - Geology of the western Lake St. Joseph area, Kenora and Thunder Bay districts
Publication Number: R070 Date: 1969
Author: Clifford P.M.
Publisher Name: Ontario Dept. of Mines
Location:
Map - Miniss Bay sheet, Lake St. Joseph, Kenora and Thunder Bay districts
Publication Number: M2159 Scale: 1:31,680 Date: 1968
Author: Clifford P.M.
Publisher Name: Ontario Dept. of Mines
Location:
Part - Iron formation of Lake St. Joseph
Publication Number: ARV31-08.001 Date: 1998
Author: Bruce E.L.
Publisher Name: Ontario Dept. of Mines
Location:
Map - Central Lake St. Joseph area (western sheet), District of Kenora
Publication Number: P0229 Scale: 1:15,840 Date: 1997
Author: Clifford P.M.
Publisher Name: Ontario Dept. of Mines
Location:
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