Ontario Geological Survey
Permanent Link to this Record:
MDI42L06NE00014
| Record Name(s) | Hurd-Demetrieff - 1947, Farley Island - 1947, D. Simon - 1967 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1980-Apr-24 |
| Date Last Modified | 2023-Aug-03 |
| Created By | |
| Revised By |
Primary Commodities: Gold
Secondary Commodities: Silver
Township or Area: O Sullivan Lake Area
Latitude: 50° 25' 32.17" Longitude: -87° 3' 51.87"
UTM Zone: 16 Easting: 495425 Northing: 5585955 UTM Datum: NAD83
Resident Geologist District: Thunder Bay North
NTS Grid: 42L06NE
Point Location Description: Channel sample locations from Assessment report 20000001090
Location Method: Data Compilation
1947: Hurd-Demetrieff Group discovered the showing and carried out sampling. 1955: Skyways Explorations Ltd. drilled 3 DDH totalling 468.5 m. 1967: D. Simon carried out sampling. 1980: Noranda Exploration Company Ltd. carried out mapping and sampling. 2003: Shaggy Dog Exploration Inc. carried out prospecting and sampling. 2005: Superior Canadian Resources carried out prospecting, mapping, sampling, and magnetic and VLF-EM surveys.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 15 | 42L06NE0051 | 42L06NE0051 |
| 2.3456 | 42L06NE0029 | 42L06NE0029 |
| 2.30942 | 20000001090 | 20000001090 |
| 2.39970 | 20000003726 | 20000003726 |
| 2.27707 | 42L07NW2004 | 42L07NW2004 |
Province: Superior
Subprovince: Wabigoon
Terrane: Eastern Wabigoon
Belt: Onaman-Tashota
Geological Age: Archean
| Rock Type | Rank | Composition | Texture | Relationship | Intermediate Pyroclastic Breccia | 1 | Pyroclastics | Contains |
|---|---|---|---|---|
| Vein | 2 | Quartz | Host |
Dec 17, 2020 (Therese Pettigrew) - The rocks of Farley Island consist of northeast-trending, sheared, interbanded, intermediate volcanics and tuffs. At the west end of the island, a system of several gently sinuous gash fractures, up to 12 inches wide and trending perpendicular to rock foliation, are filled with massive, milky quartz. Near the edges of the veins the host rock has been silicified (Kustra, 1968).
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Pyrite | Economic | Ore | ||||
| 2 | Arsenopyrite | Economic | Ore | ||||
| 3 | Galena | Economic | Ore | ||||
| 4 | Sphalerite | Economic | Ore | ||||
| 1 | Quartz | Economic | Gangue | ||||
| 2 | Calcite | Economic | Gangue |
Dec 17, 2020 (Therese Pettigrew) - In the summer of 1947 mineralization was discovered in a narrow stringer on the west side of Farley Island. The vein ranges from 1 to 9 inches wide and has a most irregular course. A parallel vein was subsequently discovered a few feet to the north, which was mineralized with abundant arsenopyrite. The country rock in which the veins occur is sheared agglomerate and tuff (Moorhouse, 1955). The major gangue mineral is milky quartz. It is associated with calcite and lesser amounts of pyrite, arsenopyrite, galena, sphalerite and gold and silver values, of which silver appears the most important. Rather commonly the visible metallic minerals are concentrated at quartz vein borders and frequently spread into the enclosing host material. Pyrite and arsenopyrite frequently occur as streaks and extended clots of grains at silicified vein contacts. Galena and sphalerite mineralization is minor and occurs as streaks and discrete grains within the quartz, near vein contacts. Several select samples taken by the owner of quartz, heavily mineralized with arsenopyrite and pyrite in addition to galena and sphalerite were submitted by the author to the Laboratory Branch, Ontario Department of Mines and gave on analysis very high silver values (Kustra, 1968). The showing is hosted within intensely sheared intermediate to felsic pyroclastic rocks (agglomerate) and is located along the western shore of Farley Island. Two modes of mineralization were sampled: the sulphidized shear zone (quartz-carbonate-sericite schist) and narrow crosscutting and moderately dipping quartz veinlets. No sulphide mineralization was observed within the narrow quartz veining and locally up to 5 to 10% fine grained disseminated silvery pyrite was found within the quartz carbonate sericite schist. Rare fine grained purplish-grey mineral (molybdenite) and or arsenopyrite is found within the schist. A sample collected in 2005 returned 15.75 g/t Au (Assessment report 20000001090). Sample 21758 collected in 2003 returned 2.7 ppm Au and 10.6 ppm Ag (Assessment report 42L07NW2004).
Mono - Silver cobalt calcite vein deposits of Ontario
Publication Number: MDC010 Page: 82 Date: 1968
Author: Sergiades A.O.
Publisher Name: Ontario Dept. of Mines
Location:
Article - Port Arthur District
Publication Number: MP016.002 Page: 54-55 Date: 1997
Author: Kustra C.R.
Publisher Name: Ontario Dept. of Mines
Location:
Part - Geology of the O'Sullivan Lake area
Publication Number: ARV64-04 Page: 22 Date: 1997
Author: Moorhouse W.W.
Publisher Name: Ontario Dept. of Mines
Location:
Folio - O'Sullivan Lake area, District of Thunder Bay
Publication Number: GDIF017 Date: 1997
Author: Thunder Bay RGO
Publisher Name: Ontario Geological Survey
Location:
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