Ontario Geological Survey
Permanent Link to this Record:
MDI52A06NW00010
| Record Name(s) | Hewitson - 1923 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1982-Nov-17 |
| Date Last Modified | 2022-Apr-26 |
| Created By | |
| Revised By |
Primary Commodities: Silver, Aggregate
Secondary Commodities: Barite, Zinc, Fluorite
Township or Area: McIntyre
Latitude: 48° 25' 6.7" Longitude: -89° 15' 13"
UTM Zone: 16 Easting: 333260 Northing: 5365273 UTM Datum: NAD83
Resident Geologist District: Thunder Bay South
NTS Grid: 52A06NE, 52A06NW
Point Location Description: Precise
Location Method: Data Compilation
In 1923, Mr. Jones discovered silver in a vein in the southern bank of the quarry. No assessment reports were located.
Province: Southern
Formation Group: Animikie Group
Geological Age: Paleoproterozoic
| Rock Type | Rank | Composition | Texture | Relationship | Diabase | 1 | Diabase Sill |
|---|---|---|---|---|
| Terrigenous-Clastic-Unsubdivided | 2 | Adjacent | ||
| Vein | 3 |
Mar 23, 2018 (Therese Pettigrew) - About one-half mile to the southwest of Port Arthur and one mile ENE of the Port Arthur Golf Club, the rocks are exposed along a ridge that slopes at a small angle toward the southeast. A 15 feet thick diabase sill lies between thinly laminated, dark-grey shale and passes near the quarry. The upper and lower contacts of the diabase sill may be observed on the west side of the quarry. Several faults and small veins that trend at various angles are exposed in the workings. These intersect in an irregular pattern (Vos et al., 1982).
| 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 | Sphalerite | Economic | Ore |
Mar 23, 2018 (Therese Pettigrew) - A mineralized vein carrying argentite and native silver was found in the quarry. It is 1 foot wide, strikes N80E and is exposed over a length of less than 20 feet. The rock in the quarry has been removed to depths up to 20 feet in an area of 125 yards by 75 yards. Crushed diabase was produced for road metal and the indurated shale lying about 10 feet below the base of the diabase sill has also been used, after crushing and screening, for surfacing roads (Vos et al., 1982). In 1923, Mr. Jones discovered silver in a vein in the southern bank of the Hewitson Quarry. It cuts diabase, is 6 inches wide, and strikes N25E. Some of the small veins in the Hewitson quarry are cemented almost entirely with quartz, and others with barite (Tanton, 1931).
Map - Geological series, Quaternary geology and industrial mineral resources of the City of Thunder Bay, District of Thunder Bay
Publication Number: P0817 Scale: 1:50,000 Date: 1973
Author: Burwasser G.J.
Publisher Name: Ontario Division of Mines
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: 152-153 Date: 1931
Author: Tanton, T.L.
Publisher Name: Geological Survey of Canada
Location: https://doi.org/10.4095/100799
Mono - Industrial minerals of northern Ontario-supplement 1
Publication Number: OFR5388 Page: 43-44 Date: 1982
Author: Vos M.A., Abolins T., Smith V.
Publisher Name: Ontario Geological Survey
Location:
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