Ontario Geological Survey
Permanent Link to this Record:
MDI52E10NW00015
| Record Name(s) | Rush Bay Quarry - 1987 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Producing Mine |
| Date Created | 1987-Apr-08 |
| Date Last Modified | 2022-Mar-30 |
| Created By | |
| Revised By |
Primary Commodities: Miscellaneous Stone
Township or Area: Forgie
Latitude: 49° 41' 31.94" Longitude: -94° 55' 45.36"
UTM Zone: 15 Easting: 360858.66 Northing: 5506196.271 UTM Datum: NAD83
Resident Geologist District: Kenora
NTS Grid: 52E10NW
Point Location Description: General
Location Method: Conversion from MDI
Rush Bay Quarries Ltd. began production of flagstone in 1978 and is still in production.
| Rock Type | Rank | Composition | Texture | Relationship | Felsic Tuff | 1 |
|---|
Mar 30, 2022 (Therese Pettigrew) - The deposit is in an east-trending shear zone cutting felsic metavolcanics. The rock extracted is fine-grained felsic tuff with varying amounts of pyrite and pyrrhotite disseminated throughout giving it a rusty weathered surface. Faulting has produced a zone 12.5 m wide of fissile schistose rock. The predominant colour of the rock is light yellow-green, stained rusty by hematite developed on the schistosity plane. The degree of fissility changes abruptly both along and across the shear zone. Material is extracted from an open cut roughly 100 m long and 10-12 m wide and up to 4 m deep. The rock is broken into 0.5 m3 blocks by wedges and occasional small blasts, then it is split with wedges into thin (1-2 cm) sheets. The predominant lithology is felsic lapilli tuff and ash tuff, often showing graded bedding fining to the south. Bedding in the fine tuff is 2-10 mm thick. Fragments up to 10 cm long and 4 cm wide occur in the coarser tuff. All the units are matrix-supported with a maximum of about 35% lapilli and larger fragments. Several thin (0.3-0.6 m) units of very fine-grained graphitic cherty sedimentary rock separate tuff units; occasional clasts of this material are found in the coarse tuff units. The rock type that makes the best flagstone is fine tuff. Lapilli and larger fragments do not deform as readily and the resulting schistosity is undulatory and difficult to split. A second shear zone in lapilli tuff demonstrates this (Storey, 2986).
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Pyrite | Economic | Ore | ||||
| 2 | Pyrrhotite | Economic | Ore | ||||
| 3 | Hematite | Economic | Ore |
Article - 1979 report of Northwestern Regional Geologist and Kenora Resident Geologist
Publication Number: MP091.001 Scale: Date: 1997
Author: Beard R.C., Rivett A.S.
Publisher Name: Ontario Geological Survey
Location:
Mono - Industrial minerals of northern Ontario-supplement 1
Publication Number: OFR5388 Scale: Date: 1982
Author: Vos M.A., Abolins T., Smith V.
Publisher Name: Ontario Geological Survey
Location:
Compend - Report of activities, 1983, Regional and Resident Geologists
Publication Number: MP117 Scale: Date: 1984
Author: Kustra C.R.
Publisher Name: Ontario Geological Survey
Location:
Mono - Building and ornamental stone inventory in the districts of Kenora and Rainy River
Publication Number: MDC027 Scale: 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