Ontario Geological Survey
Permanent Link to this Record:
MDI52E15SE00003
| Record Name(s) | CPR Quarry Island - 1882 |
|---|---|
| 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: Granite
Township or Area: Pellatt
Latitude: 49° 45' 60" Longitude: -94° 33' 31.09"
UTM Zone: 15 Easting: 387759.706 Northing: 5513853.694 UTM Datum: NAD83
Resident Geologist District: Kenora
NTS Grid: 52E15SE
Point Location Description: Transfer
Location Method: Conversion from MDI
Access Description: The working sare accessible only from Darlington Bay
The rock was quarried during the 1880s for bridge pier construction on the CPR and for construction of the flour mills in Keewatin. There has been no recorded extraction since that time. Quarry is 50 m by 30 m by 1-4 m deep. Estimated volume produced is 3000 cubic meters, reserves are open.
| Rock Type | Rank | Composition | Texture | Relationship | Porphyry-unsubdivided | 1 | porphyritic trondhjemite | Is |
|---|
Mar 30, 2022 (Therese Pettigrew) - The rock is a grey to dark grey-coloured strongly foliated 'granite' with prominent pink feldspar megacrysts. There is 3 to 10 mm layering parallel to the foliation. Amphibolite inclusions stretched parallel to the foliation are common. The foliation trends 085 to 090 degrees / 76 degrees N. The rock splits well along this foliation. There are joint-like fractures parallel to the foliation spaced about 2 m apart and a set of vertical joints 165 to 180 degrees. The joint spacing varies from 0.6 to greater than 5 m with much of it in the 2 m range. The rock is cut by a few quartz veins. Some of the amphibolite inclusions weather rusty. The unit occurs along the south boundary of the English River Subprovince and has "a consistency in width and great continuity in length" (Gower 1978). Gower described the rock as follows: "Within the body, the most typical rock type contains markedly zoned alkali feldspar megacrysts (15 x 15 mm), varying in shape from euhedral to lenticular and commonly rotated. Both intensely deformed and undeformed megacrysts occur together, suggesting growth at various stages during intermittent, on-going deformation. The dark grey groundmass consists of comminuted, wispy or slivery References quartz and feldspar." (Storey, 1986).
Book - Report on the geology of the Lake of the Woods region, with special reference to the Keewatin (Huronian?) belt of Archean rocks; Geological and Natural History Survey of Canada, New Series, Vol. 1, pt. cc
Publication Number: Date: 1985
Author: Lawson, A.C.
Publisher Name:
Location:
Mono - Building and ornamental stone inventory in the districts of Kenora and Rainy River
Publication Number: MDC027 Page: 31-32 Date: 1986
Author: Storey C.C.
Publisher Name: Ontario Geological Survey
Location:
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