Ontario Geological Survey
Permanent Link to this Record:
MDI42D10NW00003
| Record Name(s) | Francois Island Occurrence - 1991, Francois Island - 1991 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Discretionary Occurrence |
| Date Created | 1991-Apr-01 |
| Date Last Modified | 2022-May-12 |
| Created By | |
| Revised By |
Primary Commodities: Asbestos
Township or Area: Slate Islands Area
Latitude: 48° 41' 19.11" Longitude: -86° 58' 58.77"
UTM Zone: 16 Easting: 501251.662 Northing: 5392844.797 UTM Datum: NAD83
Resident Geologist District: Thunder Bay South
NTS Grid: 42D10NW
Point Location Description: Francois Island.
Location Method: Conversion from MDI
Access Description: Francois Island is a small island situated between Delante Island and Dupuis Island and northeast of Mortimer Island (claim map G-614). Access is gained via watercraft from Terrace Bay.
Nothing is known about past development and exploration. The Slate Islands have now been withdrawn from staking.
Province: Superior
Subprovince: Wawa
Terrane: Wawa-Abitibi
Belt: Schreiber-Hemlo
Geological Age: Archean
Dec 07, 2005 (B Schnieders) - Sage (1983, p.209) described the asbestos showing as: 'a pod of dark green talcous(sic), ultramafic rock 1x3 feet and consisted of irregular seams up to 1 cm in width. This mineral occurs in assocation with minor occurrence of ultramafic intrusive rocks which are most likely to be found in Delante Island and Mortimer Island.
Dec 07, 2005 (B Nelson) - The occurrence is classed as an 'ultramafic intrusion-hosted asbestos' deposit. The occurrence of asbestos fibre on the south side of Francois Island was a pod of dark green talcose, ultramafic rock 1 x 3 feet and consisted of irregular seams up to 1 cm in width. This mineral occurs is association with minor occurrence of ultramafic intrusive rocks which are most likely to be found in Delant Island and Mortimer Island. These islands consequently are considered to offer the best possibility for the occurrence of an asbestos-bearing ultramafic body. Ground traversing by members of Sage's field party (1983) 'has been sufficient to preclude the possibility of the presence of a large asbestos bearing body but traversing has not been sufficiently detailed to rule out the possibility of a small ultramafic intrusive containing asbestos fibre of limited economic interest.' Sage goes on to say that the chances for the location of such a deposit is not thought to be exceptionally good, but it does nonetheless remain of some potential.
| Rock Type | Rank | Composition | Texture | Relationship | Ultramafic-Unsubdivided | 1 | Talcose | Host |
|---|
Dec 07, 2005 (B Nelson) - The occurrence of asbestos fibre was a pod of dark green, talcose ultramafic rock.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Asbestos | Economic | Ore |
Dec 07, 2005 (B Nelson) - The location of asbestos fibre on Francois Island suggests that the islands may have limited potential for an occurrence of this mineral commodity (Sage, 1983).
Dec 07, 2005 (B Nelson) - Not known.
Mono - Geology of the Slate Islands
Publication Number: OFR5435 Date: 1984
Author: Sage R.P.
Publisher Name: Ontario Geological Survey
Location:
Mono - Mineral Occurrences in the Nipigon-Marathon Area, Volumes 1 and 2.
Publication Number: OFR5951 Date: 1996
Author: Schnieders B.R., Smyk M.C., Speed A.A., McKay D.B.
Publisher Name: Ontario Geological Survey
Location:
File - Resident Geologist files, Schreiber-Hemlo district
Publication Number: Date:
Author:
Publisher Name:
Location: Thunder Bay RGP
Mono - Geology of the Slate Islands
Publication Number: OFR5435 Date: 1984
Author: Sage R.P.
Publisher Name: Ontario Geological Survey
Location:
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