Ontario Geological Survey
Permanent Link to this Record:
MDI52E10NE00017
| Record Name(s) | Northern Peninsula Mariposite - 1948 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Developed Prospect Without Reported Reserves or Resources |
| Date Created | 1991-Jan-23 |
| Date Last Modified | 2022-Mar-30 |
| Created By | |
| Revised By |
Primary Commodities: Miscellaneous Stone
Township or Area: Clearwater Bay Area
Latitude: 49° 39' 24.94" Longitude: -94° 36' 42.03"
UTM Zone: 15 Easting: 383678.676 Northing: 5501734.675 UTM Datum: NAD83
Resident Geologist District: Kenora
NTS Grid: 52E10NE
Point Location Description: Transfer
Location Method: Conversion from MDI
The deposit was investigated for its gold potential several times. The initial discovery was prior to 1948; the first investigation was by NorPenn Mines Ltd. in 1948, the second by Hudson Bay Exploration and Development in 1974 and the third by Raleigh Minerals Ltd. in 1980. The deposit was quarried for decorative stone material for local construction by J. W. Cambell in 1972 and I. McLandress from 1973 to 1976; one shipment was sent to Texas by the owner of a summer resort adjacent to the property.
| Rock Type | Rank | Composition | Texture | Relationship | Felsic Tuff | 1 | sheared | Is |
|---|
Mar 30, 2022 (Therese Pettigrew) - The rocks of the mariposite deposit are highly silicified and carbonatized sheared felsic metavolcanics. Mapping and diamond drilling during gold exploration has delineated several felsic pyroclastic units trending east with minor intercalated metasediments. The mariposite zone can be traced for 1.6 km west from the quarry workings parallel to the shore (Holbrooke 1949, Chisholm 1950). Workings comprise a shallow quarry now filled with waste to within 0.3 m of the surface and small pits in the stream bed. The rock exposed in these workings is bright green in colour with rusty weathering quartz-carbon ate (ankerite) vein material. Vein material makes up approximately 10% of the rock. The rock is strongly foliated at 090 to 100 degrees with subvertical dip. The rock immediately north of the mariposite is matrix-supported felsic lapilli tuff. Thin seams of green mariposite are present in the tuff. Black slate is exposed as part of the assemblage north of the mariposite unit. Diamond drilling further west along the strike of the deposit by Hudson Bay Exploration and Development indicated thicknesses of black slate up to 7.5 m and similar thicknesses of olive-coloured "mariposite"; the remainder was dark grey, fine-grained metasediments and felsic pyroclastic rocks. The strong foliation present in the mariposite is also found in the felsic rocks to the north. These rocks split cleanly into 1 to 2 cm thick slabs (Storey, 1986). An additional occurrence of carbonatized mariposite schist was mentioned by Chisholm about 1 km north of the workings. This was referred to as the H. Broe occurrence by Chisholm (1950) and was located by Holbrooke (1949).
Mar 30, 2022 (Q Unknown) - Zone is over 700 m long by 8 m thick with a vertical dip. Production unknown.
Part - Geology of the north central part of the Lake of the Woods
Publication Number: ARV45-03.001 Date: 1997
Author: Thomson J.E.
Publisher Name: Ontario Dept. of Mines
Location:
Mono - Building and ornamental stone inventory in the districts of Kenora and Rainy River
Publication Number: MDC027 Page: 71-72 Date: 1986
Author: Storey C.C.
Publisher Name: Ontario Geological Survey
Location:
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