Ontario Geological Survey
Permanent Link to this Record:
MDI42L06NE00004
| Record Name(s) | R. Cryderman - 1920 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1980-Apr-23 |
| Date Last Modified | 2023-Aug-03 |
| Created By | |
| Revised By |
Primary Commodities: Gold
Township or Area: O Sullivan Lake Area
Latitude: 50° 25' 3.2" Longitude: -87° 6' 3.9"
UTM Zone: 16 Easting: 492818.55 Northing: 5585063.1 UTM Datum: NAD83
Resident Geologist District: Thunder Bay North
NTS Grid: 42L06NE
Point Location Description: Pit on OGS map M1955-02
Location Method: Data Compilation
Pre-1920: R. Cryderman discovered gold in a sheared and carbonated porphyry on the south side of the Cryderman Peninsula. 1990: J..Rapski carried out prospecting and sampling. 1992: R. Roy carried out prospecting and sampling.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| OP92-753 | 42L07NW0022 | 42L07NW0022 |
| 63.5817 | 42E11NW0001 | 42E11NW0001 |
Province: Superior
Subprovince: Wabigoon
Terrane: Eastern Wabigoon
Belt: Onaman-Tashota
Geological Age: Archean
| Rock Type | Rank | Composition | Texture | Relationship | Mafic lava flow-unsubdivided | 1 | Near |
|---|---|---|---|---|
| Quartz Porphyry | 1 | Quartz | Host | |
| Vein | 2 | Quartz | Host |
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Pyrite | Economic | Ore |
Dec 17, 2020 (Therese Pettigrew) - Narrow quartz veins fill the fissures in a sheared quartz porphyry dike that outcrops for 110 feet along the shore of O'Sullivan Lake in the bay of the 103-chain portage. The country rock is greenstone, in which ankerite has developed across 30 feet at 10 feet west of the porphyry. The quartz veins in the dike are not more than a few inches wide. They strike 60 degrees and dip 750 S. The porphyry dike reappears on the east side of an island in the bay with a small showing of ankerite. The centre of the island is formed by a wide Keweenawan diabase dike, in which much epidote has formed. On the mainland the northern part of this dike cuts the greenstone 180 feet west of the Cryderman porphyry dike. Close to the shore on the claim east of the porphyry dike, a felsite dike was found mineralized with pyrite and traversed by a narrow quartz vein. Gold values reported from a 5-foot and a 4-foot channel sample in the ankerite zone were $6 and $20, respectively (Kindle, 1931).
Mono - Gold deposits of Ontario, part 1, districts of Algoma, Cochrane, Kenora, Rainy River, and Thunder Bay
Publication Number: MDC013 Page: 301 Date: 1971
Author: Ferguson S.A., Groen H.A., Haynes R.
Publisher Name: Ontario Dept. of Mines and Northern Affairs
Location:
Part - Kowkash-Ogoki area, District of Thunder Bay
Publication Number: ARV40-04.002 Page: 99-100 Date: 1998
Author: Kindle L.F.
Publisher Name: Ontario Dept. of Mines
Location:
Part - Geology of the O'Sullivan Lake area
Publication Number: ARV64-04 Page: 21 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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