Ontario Geological Survey
Permanent Link to this Record:
MDI52A03SW00005
| Record Name(s) | Jarvis Island - 1868, Westfield - 1968 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Developed Prospect Without Reported Reserves or Resources |
| Date Created | 1979-Jul-27 |
| Date Last Modified | 2023-Feb-06 |
| Created By | |
| Revised By |
Primary Commodities: Silver
Secondary Commodities: Zinc, Barite, Lead, Copper
Township or Area: Spar And Victoria Islands Area
Latitude: 48° 5' 49.22" Longitude: -89° 18' 23.02"
UTM Zone: 16 Easting: 328281 Northing: 5329655 UTM Datum: NAD83
Resident Geologist District: Thunder Bay South
NTS Grid: 52A03SW
Point Location Description: AMIS Shaft location
Location Method: Conversion from MDI
Access Description: Drive south on Hwy. 61 to the turnoff onto the Sturgeon Bay Road. Drive 15 km east to Sturgeon Bay, where a boat can be launched. From the boat launch, the island is situated 11.3 km almost due south.
1868: T. McFarlane discovered the vein. 1869: 3.65 m shaft sunk. 1870: shaft deepened to 6.7 m. 1871: Jarvis Mining Company acquired the property from The Ontario Mineral Lands Company. Three shafts were sunk to 48.8, 9.4, 23.8 m depth. 1872: operations were suspended due to financial difficulties. 1886: Jarvis Mining resumed underground development including drilling north and south from main shaft. 1888: work was suspended. 1927: Sudbury Basin Mines Company acquired the property. 1968: Westfield Minerals Ltd. acquired the property.
Province: Southern
Formation Group: Animikie Group
Geological Age: Paleoproterozoic
| Rock Type | Rank | Composition | Texture | Relationship | Diabase | 1 | Diabase Dyke |
|---|---|---|---|---|
| Vein | 2 | Calcite And Barite | Host | |
| Mudstone | 3 | Shale | Adjacent |
| 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 | Chalcopyrite | Economic | Ore | ||||
| 4 | Fluorite | Economic | Ore | ||||
| 5 | Galena | Economic | Ore | ||||
| 6 | Pyrite | Economic | Ore | ||||
| 7 | Sphalerite | Economic | Ore | ||||
| 1 | Calcite | Economic | Gangue | ||||
| 2 | Quartz | Economic | Gangue |
Feb 28, 2018 (Therese Pettigrew) - Jarvis Island is formed by two parallel NE-striking Keweenawan diabase dykes about 107 m apart that support between them flat-lying Animikie argillites of the Rove Formation. The argillite bedding is turned down against the northern dyke but turned up against the southern one. Biotite and hematite develop at the contacts. A NW-striking calcite vein that dips 55 degrees NE crosses the island. The vein is coarsely banded and varies from 3-4.6 m in thickness. Some argentite with galena and sphalerite occurs in a gangue of coarse calcite and barite with minor quartz (Sergiades, 1968).
| Rank | Classification |
|---|---|
| 1 | Vein |
| Rank | Characteristic |
|---|---|
| 1 | Vein |
| Year | Tonnes | Commodities | Reference | Comment |
|---|---|---|---|---|
| 1911 | 999 |
Silver 36000 Ounces |
Sergiades, 1968 | $40,000 from about 36,000 oz of silver were produced between 1868-1911 |
Mono - Silver cobalt calcite vein deposits of Ontario
Publication Number: MDC010 Page: 61 Date: 1968
Author: Sergiades A.O.
Publisher Name: Ontario Dept. of Mines
Location:
MonoMap - Geology of Crooks Township, Jarvis and Prince locations, and offshore islands, District of Thunder Bay
Publication Number: R102 Page: 9, 18, 23, 38 Date: 1973
Author: Geul J.J.C.
Publisher Name: Ontario Division of Mines
Location:
Mono - Barite in Ontario
Publication Number: IMR010 Page: 6-8 Date: 1997
Author: Guillet G.R.
Publisher Name: Ontario Dept. of Mines
Location:
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