Ontario Geological Survey
Permanent Link to this Record:
MDI52A06NW00002
| Record Name(s) | Port Arthur - 1923, Lot 53 - 1923 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Discretionary Occurrence |
| Date Created | 1979-Aug-09 |
| Date Last Modified | 2022-Apr-26 |
| Created By | |
| Revised By |
Primary Commodities: Silver
Secondary Commodities: Barite, Fluorite, Uranium, Copper, Lead, Zinc
Township or Area: McIntyre
Latitude: 48° 24' 42.22" Longitude: -89° 15' 47.19"
UTM Zone: 16 Easting: 332535 Northing: 5364538 UTM Datum: NAD83
Resident Geologist District: Thunder Bay South
NTS Grid: 52A06NW
Point Location Description: General
Location Method: Conversion from MDI
No assessment files were located.
Province: Southern
Formation Group: Animikie Group
Geological Age: Paleoproterozoic
| Rock Type | Rank | Composition | Texture | Relationship | Ironstone-unsubdivided | 1 | Adjacent |
|---|---|---|---|---|
| Terrigenous-Clastic-Unsubdivided | 2 | |||
| Vein | 3 | Host |
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Argentite | Economic | Ore | ||||
| 2 | Barite | Economic | Ore | ||||
| 3 | Fluorite | Economic | Ore | ||||
| 4 | Silver | Economic | Ore | ||||
| 5 | Anthraxolite | Economic | Ore | ||||
| 6 | Chalcopyrite | Economic | Ore | ||||
| 7 | Galena | Economic | Ore | ||||
| 8 | Pyrite | Economic | Ore | ||||
| 9 | Sphalerite | Economic | Ore |
Mar 23, 2018 (Therese Pettigrew) - In Lower Gunflint iron formation, 6 E-W veins occupy fault fractures. The north-most vein strikes ENE, is 1 foot wide and contains leaf argentite and barite (Sergiades, 1968). In an old quarry on Central Avenue, lot 53, McIntyre Township, in the southwestern part of the city of Port Arthur, about one-half mile east of the Golf Club, a system of six veins, trending north-easterly, is exposed on a surface 400 feet across. This locality is three-quarters of a mile southwest of the Hewitson quarry. All the veins occupy fault fractures in nearly fiat-lying Animikie sediments. The amount of dislocation is apparently greatest at a position now occupied by a 14-inch vein of barite which strikes north 50 degrees east. The rock on the northwest side consists of dark grey shale; the rock on the southeast is cherty carbonate, a phase of iron formation interpreted as occurring at a lower stratigraphic horizon than the shale. A few feet south of the barite vein there is a vein striking north 31 degrees east, one foot wide, and consisting of calcite, quartz, and purple fluorite. Twenty-five feet west there is a parallel vein also south of the barite vein. It has a width of 4 inches and in the few feet through which it is exposed, is filled with anthraxolite. One hundred feet northwest of the barite vein there is a network of stringers which locally unite to form a vein approximately one foot wide trending north 60 degrees east. This vein is an intimate assemblage of quartz, calcite, barite, and purple and green fluorite. A small amount of leaf argentite was discovered here by R. Thomson, in 1923. Other veins that probably form part of the same vein system me exposed within 100 feet north of the one previously described and in them the following minerals were observed: quartz, amethyst, calcite, barite, purple and green fluorite, sphalerite, and marcasite. Four hundred feet south-southwest from the old quarry there is a second shallow excavation in which small veins occur trending northeasterly. These show all minerals above mentioned. Anthraxolite is prominently exposed filling parts of veins in this locality (Tanton, 1931). A grab sample assayed 0.0034% U3O8 (Robertson and Gould, 1983).
| Rank | Classification |
|---|---|
| 1 | Vein |
| Rank | Characteristic |
|---|---|
| 1 | Vein |
Journal - Nickeliferous and Uraniferous Anthraxolite from Port Arthur, Ontario; In: American Mineralogist, v. 19, no. 9, p. 426-428
Publication Number: Amer Min V.19 Date: 1934
Author: Ellsworth, H.V.
Publisher Name: American Mineralogist
Location:
Mono - Silver cobalt calcite vein deposits of Ontario
Publication Number: MDC010 Page: 76 Date: 1968
Author: Sergiades A.O.
Publisher Name: Ontario Dept. of Mines
Location:
Publication - Fort William and Port Arthur, and Thunder Cape Map-area, Thunder Bay District, Ontario; Geological Survey of Canada, Memoir 167
Publication Number: GSC Memoir 167 Page: 151-152, 201 Date: 1931
Author: Tanton, T.L.
Publisher Name: Geological Survey of Canada
Location: https://doi.org/10.4095/100799
Mono - Uranium and thorium deposits of northern Ontario
Publication Number: MDC025 Page: 131-132 Date: 1984
Author: Robertson J.A., Gould K.L.
Publisher Name: Ontario Geological Survey
Location:
Publication - Canadian deposits of uranium and thorium; Geological Survey of Canada, Economic Geology Series 16
Publication Number: GSC EconGeol 16 Page: 120 Date: 1952
Author: Lang, A.H.
Publisher Name: Geological Survey of Canada
Location: https://doi.org/10.4095/102450
Mono - Uranium and thorium deposits of northern Ontario
Publication Number: MDC009 Page: 87 Date: 1968
Author: Robertson J.A.
Publisher Name: Ontario Dept. of Mines
Location:
We are continuously updating our assessment file / technical report information. If you notice errors in the data, please contact us.
Please review our Terms of Use agreement for this data product.
For detailed information regarding this mineral record please contact the Thunder Bay South Resident Geologist District Office