Ontario Geological Survey
Permanent Link to this Record:
MDI52H09NE00005
| Record Name(s) | T. Johnson - 1934, Z. Renshaw - 1967 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1984-Aug-23 |
| Date Last Modified | 2022-May-09 |
| Created By | |
| Revised By |
Primary Commodities: Gold
Township or Area: Dorothea
Latitude: 49° 40' 26.82" Longitude: -88° 5' 55.28"
UTM Zone: 16 Easting: 420730 Northing: 5502978 UTM Datum: NAD83
Resident Geologist District: Thunder Bay North
NTS Grid: 52H09NE
Point Location Description: AMIS location plus description from R122 and M2294
Location Method: Data Compilation
1934-35: Tom Johnson Nipigon Mines Ltd. optioned the property and carried out exploration work including trenching and 1040 m of drilling. 1967: Z. Renshaw held the property. 2003: H.G. Goodman carried out prospecting, stripping, and sampling. 2008: H.G. Goodman carried out prospecting, stripping, sampling, and packsack drilling.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 2.39153 | 20000003527 | 20000003527 |
| 2.26154 | 52H09NE2005 | 52H09NE2005 |
| 63.4128 | 52H09NE0012 | 52H09NE0012 |
Province: Superior
Subprovince: Wabigoon
Belt: Beardmore-Geraldton
Geological Age: Archean
| Rock Type | Rank | Composition | Texture | Relationship | Vein | 1 | Quartz | Host |
|---|---|---|---|---|
| Mafic lava flow-unsubdivided | 2 | Amygdaloidal Flow | Contains |
| 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 | Chalcopyrite | Economic | Ore | ||||
| 4 | Hematite | Economic | Ore | ||||
| 5 | Gold | Economic | Ore |
Sep 30, 2019 (Therese Pettigrew) - A quartz vein ranging from 4 to 12 inches in width has been exposed in a trench over a length of 340 feet; it strikes N 70 E. The vein appears to follow a shear zone in greyish amygdaloidal lava and at one point intersects a 30-foot granitic dike. The quartz carries pyrite and specular hematite (Laird, 1937). Subsequent to Laird’s visit, additional work was done and gold values ranging from a trace to 0.90 oz/t Au over narrow widths were found (Mackasey, 1975). A quartz vein ranges from 2-12 inches wide. The quartz is grayish to white, vitreous crack-seal type. Chlorite and sericite alteration has formed in the fractures and slip planes with areas of hematite alteration located here and there along strike of the vein. The vein follows a narrow shear zone in grayish amygdaloidal lava with severe shearing and alteration near the quartz contact. Mineralization consists mainly of pyrite, fine to coarse usually in fractures and as individual seams up to a 1/4" wide. Chalcopyrite is found in lesser amounts but certain areas have abundant quantities and generally is not dispersed throughout the vein as the pyrite. Occasional specular hematite patches also exist within the quartz. This mineralization can be found within the immediate volcanic host along with quartz contacts. The amygdaloidal flow hosting the quartz vein ranges from 50 to 100 feet wide with volcanic brecciated horizons found, granitic dykes and porphyries adjacent to the amygdaloidal flow. Samples collected in 2003 returned results up to 93.656 and 147.318 g/t Au (Assessment report 52H09NE2005). Samples collected in 2008 returned values up to 2.706 g/t Au (Assessment report 20000003527).
Map - Dorothea, Sandra and Irwin townships, Thunder Bay District
Publication Number: M2294 Scale: 1:31,680 Date: 1974
Author: Mackasey W.O.
Publisher Name: Ontario Division of Mines
Location:
MonoMap - Geology of Dorothea, Sandra, and Irwin townships, District of Thunder Bay
Publication Number: R122 Page: 65 Date: 1975
Author: Mackasey W.O.
Publisher Name: Ontario Division of Mines
Location:
Part - The western part of the Sturgeon River area (Sturgeon R.-Beardmore section)
Publication Number: ARV45-02.002 Page: 117 Date: 1998
Author: Laird H.C.
Publisher Name: Ontario Dept. of Mines
Location:
File - Resident Geologist Mineral Deposit Files
Publication Number: Min Dep Date: 1996
Author:
Publisher Name:
Location: Thunder Bay RGP
Folio - Poplar Point area (Dorothea Township), District of Thunder Bay
Publication Number: GDIF186 Date: 1997
Author: Thunder Bay RGO
Publisher Name: Ontario Geological Survey
Location:
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