Ontario Geological Survey
Permanent Link to this Record:
MDI42G10SW00008
| Record Name(s) | Montcalm Creek Pegmatite - 2002, Montcalm Creek Quarry - 2006 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Discretionary Occurrence |
| Date Created | 2003-Aug-12 |
| Date Last Modified | 2024-Jan-23 |
| Created By | |
| Revised By |
Primary Commodities: Mica
Township or Area: McCrea
Latitude: 49° 32' 35.2" Longitude: -82° 57' 27.35"
UTM Zone: 17 Easting: 358384 Northing: 5489675 UTM Datum: NAD83
Resident Geologist District: Timmins
NTS Grid: 42G10SW
Point Location Description: Grab sample from quarry
Location Method: Field Visit with GPS
Access Description: The site is accessible by driving west from Opasatika along highway 11 for a distance of approximately 7 km.
Province: Superior
Subprovince: Quetico
Geological Age: Archean
| Rock Type | Rank | Composition | Texture | Relationship | Pegmatite | 1 | Potassic | Host |
|---|---|---|---|---|
| Granite | 2 | Near |
Apr 14, 2014 (A Wilson) - The occurrence is described as consisting of 2 pits. The first pit contains biotite granite with coarse-grained, graphic, pink K-feldspar up to 26 cm long), quartz, bladed biotite and minor silver muscovite, fine-grained red garnet and garnet altered to biotite. The second pit consists of potassic pegmatite with a pod of coarse-grained pink K-spar (up to 40 cm long), quartz, coarse-grained silver muscovite (up to 9 cm across). The second pit also contains a layered vein with fine-grained green muscovite aplite layer with minor fine-grained garnet, possible black tourmaline and rare green apatite, a coarse quartz core and a muscovite leucogranite layer with minor garnet. The pegmatite is part of the McCrea-Shetland pegmatitic granite zone.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Muscovite | Economic | Ore | ||||
| 1 | Garnet | Economic | Gangue |
Apr 14, 2014 (A Wilson) - Feldspar crystals within the pegmatite range up to 40 cm in length.
| Rank | Classification |
|---|---|
| 1 | Magmatic |
| 2 | Pegmatite |
| Rank | Characteristic |
|---|---|
| 1 | Massive |
| Shape | Length | Thickness | Depth | Strike | Dip | Plunge | Trend | Age | Reference |
|---|---|---|---|---|---|---|---|---|---|
| Unknown |
Compend - Summary of Field Work and Other Activities, 2002
Publication Number: OFR6100 Page: 6.1-6.42 Date: 2002
Author: Baker C.L., Debicki E.J., Kelly R.I., Parker J.R.
Publisher Name: Ontario Geological Survey
Location:
Map - Hearst-Kapuskasing sheet, geological compilation series, Algoma and Cochrane districts
Publication Number: M2166 Scale: 1:253,440 Date: 1969
Author: Bennett G., Brown D.D., George P.T., Leahy E.J.
Publisher Name: Ontario Dept. of Mines
Location:
Mono - Fertile and Peraluminous Granites and Related Rare-Element Mineralization in Pegmatites, North-Central and Northeastern Superior Province
Publication Number: OFR6195 Page: 85-87 Date: 2006
Author: Breaks F.W., Selway J.B., Tindle A.G.
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 Timmins Resident Geologist District Office