Ontario Geological Survey
Permanent Link to this Record:
MDI52E09NW00025
| Record Name(s) | Gibbons - 1884 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Developed Prospect Without Reported Reserves or Resources |
| Date Created | 1987-May-19 |
| Date Last Modified | 2022-Mar-30 |
| Created By | |
| Revised By |
Primary Commodities: Slate
Township or Area: Bigstone Bay Area
Latitude: 49° 38' 23.28" Longitude: -94° 28' 27.48"
UTM Zone: 15 Easting: 393555.79 Northing: 5499626.804 UTM Datum: NAD83
Resident Geologist District: Kenora
NTS Grid: 52E09NW
Point Location Description: Transfer
Location Method: Conversion from MDI
1884: Mr. Gibbons produced a small amount of roofing slate from a quarry on Slate Island in Lake of the Woods. There is no record of production since the initial opening; material has been removed at various times for local construction uses (patios, fireplaces, etc.)
| Rock Type | Rank | Composition | Texture | Relationship | Felsic Tuff | 1 | carbonate-chlorite-sericite alteration | slatey foliation | Is |
|---|
Mar 30, 2022 (Therese Pettigrew) - Lawson (1886) described the deposit as follows. "In 1884 Mr. Gibbons opened a slate-quarry on an island lying to the west of Pipe-Stone Point, and during the greater portion of the summer of that year had a gang of ten men engaged in taking out slate for the Winnipeg market. The work was not continued in 1885. The slate here quarried is not, however, the best that is to be found on the lake. It is an evenly cleaving, soft, dark to glossy hydromicaceous schist, which presents unusually good facilities for quarrying due to the jointing which cuts across the planes of cleavage at definite intervals. The slate is readily cut or pierced by the slate-axe, taking an even edge, and not shattering when struck. It makes a fairly good roofing slate." The bedrock of this area consists of intermediate to felsic pyroclastic rocks, folded into a series of synforms and antiforms (Blackburn 1981). A strong axial plane cleavage developed as a result of the folding. The rocks of Slate Island are strongly foliated 080 / 90. Joints cut the foliation at right angles and are often filled by quartz veins. The rock is variable in colour from pale pinkish green to dark grey-green. The lithology is fine-grained felsic tuff with carbonate-chlorite-sericite alteration. Owing to the carbonate content, the rock is soft and easily scratched. Fine-grained fragments up to 2 mm long are visible on the broken surface in some places. These are stretched parallel to the foliation. The rock described is from the south side of Slate Island. Similar foliated tuffs occur on several small islands in the vicinity (Storey, 1986).
Mono - Building and ornamental stone inventory in the districts of Kenora and Rainy River
Publication Number: MDC027 Page: 65 Date: 1986
Author: Storey C.C.
Publisher Name: Ontario Geological Survey
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 Kenora Resident Geologist District Office