Ontario Geological Survey
Permanent Link to this Record:
MDI31E13NW00004
| Record Name(s) | Arnstein Anorthosite - 1991 |
|---|---|
| Related Record Type | Simple |
| Record Status | Prospect |
| Date Created | 1991-Jun-05 |
| Date Last Modified | 2022-Jan-05 |
| Created By | Q Unknown |
| Revised By | A Wilson |
Primary Commodities: Anorthosite, Feldspar (Nonmetals)
Township or Area: East Mills
Latitude: 45° 53' 51.5" Longitude: -79° 49' 41.48"
UTM Zone: 17 Easting: 590903 Northing: 5083341.999 UTM Datum: NAD83
Resident Geologist District: Sudbury
NTS Grid: 31E13NW
Point Location Description: approximate
Location Method: Data Compilation
Province: Grenville
Subprovince: Central Gneiss Belt
Geological Age: Mesoproterozoic
Metamorphism Grade: Granulite
Jan 24, 2011 (A Wilson) - The Arnstein anorthosite is a crescent-shaped body of anorthositic rocks southeast of the village of Arnstein and extends over an area of 80 km2. It has been almost entirely recrystallized.
| Rock Type | Rank | Composition | Texture | Relationship | Anorthosite | 1 | Is |
|---|---|---|---|---|
| Breccia-unsubdivided | 2 | Marble | Contains | |
| Gneiss-Unsubdivided | 3 | Quartzo-Felspathic | Contains |
Jan 24, 2011 (A Wilson) - Exceptionally clean anorthosite is present in places throughout the anorthosite, but no substantial thicknesses of such material were identified. Clean anorthosite is interlayered with mafic and ultramafic bands. Where the anorthosite is not layered, gneissic gabbroic anorthosite occurs. Usually this has colour indices in the range of 10 to 18, but some areas have bulk composition around 8 to 10.
Mono - Building stone, feldspar and limestone resources in central Ontario
Publication Number: OFR5760 Scale: Date: 1991
Author: Marmont C.
Publisher Name: Ontario Geological Survey
Mono - Mineral deposits studies in the Huntsville-Parry Sound-Powassan area, a progress report
Publication Number: OFR5647 Scale: Date: 1987
Author: Marmont C., Johnston M.
Publisher Name: Ontario Geological Survey
Mono - Feldspar in the Parry Sound-Huntsville-Haliburton area
Publication Number: OFR5686 Scale: Date: 1988
Author: Marmont C.
Publisher Name: Ontario Geological Survey
Map - Portions of the districts of Parry Sound and Muskoka, Province of Ontario
Publication Number: ARM51A Scale: 1:126,720 Date: 1998
Author: Satterly J.
Publisher Name: Ontario Dept. of Mines
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For detailed information regarding this mineral record please contact the Sudbury Resident Geologist District Office