Ontario Geological Survey
Permanent Link to this Record:
MDI42D13NE00006
| Record Name(s) | Pays Plat Occurrence - 1885, Merkoske Occurrence - 1996, Yesno Township Fluorite Occurrence - 1979 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1991-Apr-01 |
| Date Last Modified | 2022-Sep-12 |
| Created By | |
| Revised By |
Primary Commodities: Barite, Fluorite
Township or Area: Yesno
Latitude: 48° 54' 12.92" Longitude: -87° 34' 5"
UTM Zone: 16 Easting: 458371 Northing: 5416894 UTM Datum: NAD83
Resident Geologist District: Thunder Bay South
NTS Grid: 42D13NE
Point Location Description: Occurrence
Location Method: Conversion from MDI
Access Description: The occurrence is located 1.8 km north of Highway 17 at Pays Plat First Nation, in southeastern Yesno Township. The property is accessed by a walking trail from Pays Plat First Nation. Walking time is approximately 45 minutes.
The property was examined for its silver potential from the 1880s to the 1970s. 1987 to 1989: P. Moses staked the occurrence and conducted mechanical stripping on a number of showings. No assessment reports were found on file.
Province: Superior
Subprovince: Quetico
Geological Age: Archean
Dec 07, 2005 (B Schnieders) - A 1 to 1.5 m wide composite vein, composed of barite fluorite, quartz and amethyst, outcrops on the northeast side of a hill, and strikes 290 degrees, and has a vertical to steep dip to the south.
Dec 07, 2005 (R Degagne) - The occurrence is hosted in granite/granite gneisses of the Quetico Subprovince. The vein system is approximately 3-4' wide and is exposed in a series of small trenches on the east side of a ridge. The veins trend north-south.
| Rock Type | Rank | Composition | Texture | Relationship | Gneiss-Unsubdivided | 1 | G | Host |
|---|
Dec 07, 2005 (R Degagne) - The occurrence is hosted in granite/granite gneisses of the Quetico Subprovince. The vein system is approximately 3-4' wide and is exposed in a series of small trenches on the east side of a ridge. The veins trend north-south.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Barite | Economic | Ore | ||||
| 2 | Fluorite | Economic | Ore | ||||
| 1 | Calcite | Economic | Gangue | ||||
| 2 | Quartz | Economic | Gangue | ||||
| 3 | Pyrite | Economic | Gangue | ||||
| 4 | Chalcopyrite | Economic | Gangue |
Dec 07, 2005 (R Degagne) - Masses of white to pink euhedral barite are present within the vein. Barite-rich sections reach up to 16-20 cm wide. Purple fluorite, white calcite and white drusy quartz are the other vein minerals. Less than 1% disseminated sulphides (pyrite and chalcopyrite) are present within the vein material. The Pays Plat occurrence may be an indication of other potential mineral occurrences in the area. The area surrounding the occurrence has never been mapped in detail at any scale. The area should be prospected in detail to evaluate any potential mineral occurrences.
Apr 29, 2019 (Shannon Zurevinski) - As recorded by Lapointe (2005): Green and purple fluorite is found in silver-bearing calcite veins usually hosted in diabase dykes and sills; fluorite usually occurs in thin crusts or narrow pods for a few feet in length, in or near the wall zone; some of the veins are more than 10 ft in width. Fluorite constitutes about 5-10% of the vein material where it occurs.
| Rank | Characteristic |
|---|---|
| 1 | Vein |
| Shape | Length | Thickness | Depth | Strike | Dip | Plunge | Trend | Age | Reference |
|---|---|---|---|---|---|---|---|---|---|
| Irregular | 1 |
Date: Dec 19, 1996
Geologist: R Degagne
Notes: Visit in September, 1991 by P. Hinz | R. M. Landry (OGS OFR 5889, 1994)
Book - Nipigon-Schreiber District; In: Summary Report 1920, part D, p. 6D
Publication Number: SUM RPT Date: 1921
Author: Tanton, T.L.
Publisher Name: Geological Survey of Canada
Location: https://doi.org/10.4095/297670
Map - Nipigon-Schreiber, geological compilation series, Thunder Bay District
Publication Number: M2232 Scale: 1:253,440 Date: 1973
Author: Carter M.W., McIlwaine W.H., Wisbey P.A.
Publisher Name: Ontario Division of Mines
Location:
Mono - Industrial Mineral Occurrences and Deposits in Northwest Ontario
Publication Number: OFR5889 Page: 92-93 Date: 1994
Author: Hinz P., Landry R.M.
Publisher Name: Ontario Geological Survey
Location:
File - Industrial Minerals Geologist's Files, Thunder Bay
Publication Number: Date:
Author:
Publisher Name:
Location: Thunder Bay RGP
Map - Mineral deposits series, Ontario mineral potential, Schreiber sheet, District of Thunder Bay
Publication Number: P1520 Scale: 1:250,000 Date: 1998
Author: Springer J.S.
Publisher Name: Ontario Geological Survey
Location:
MonoMap - Geology of St. Ignace Island and vicinity, District of Thunder Bay
Publication Number: OFR5063 Date: 1997
Author: Giguere J.F.
Publisher Name: Ontario Dept. of Mines and Northern Affairs
Location:
File - Schreiber-Hemlo Resident Geologist Mineral Deposit Files, Thunder Bay office
Publication Number: Min Dep Date:
Author:
Publisher Name:
Location: Thunder Bay RGP
Mono - Fluorspar in Ontario
Publication Number: IMR012 Date: 1997
Author: Guillet G.R.
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