Ontario Geological Survey
Permanent Link to this Record:
MDI42G04NE00005
| Record Name(s) | OGS Sample 02-JBS-14 - 2002 |
|---|---|
| Related Record Type | Simple |
| Record Status | Discretionary Occurrence |
| Date Created | 2003-Aug-12 |
| Date Last Modified | 2022-Jan-05 |
| Created By | A Wilson |
| Revised By | A Wilson |
Primary Commodities: Mica
Township or Area: Pelletier
Latitude: 49° 9' 33.7" Longitude: -83° 39' 40.12"
UTM Zone: 17 Easting: 305989 Northing: 5448581 UTM Datum: NAD83
Resident Geologist District: Timmins
NTS Grid: 42G04NE
Point Location Description: Grab sample
Location Method: Field Visit with GPS
Access Description: The site is accessible by driving south from highway 11 along the Prune Creek Road to the Wawa-Quetico boundary.
Province: Superior
Subprovince: Quetico
Geological Age: Archean
| Rock Type | Rank | Composition | Texture | Relationship | Pegmatite | 1 | Potassic | Coarse-Grained | Host |
|---|---|---|---|---|
| Mafic pillowed flow | 2 | Pillowed | Near |
Apr 30, 2014 (A Wilson) - The occurrence consists of a muscovite potassic pegmatite dike (12-50 cm wide) in pillow metavolcanic rocks with calc-silicate pods. The pillows are flattened and lenticular and are metamorposed to amphibolite facies. Biotite, tourmaline and garnet occur in pillow selvages. The potassic pegmatite is abundant with green muscovite, K-feldspar, quartz and minor molybdenite and small miarolitic cavities lined with muscovite and quartz. The pegmatite dikes range in width from 1 to 5 m an consist of garnet-muscovite potassic pegmatite and garnet-muscovite fine-grained leucogranite.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Tourmaline | Economic | Ore | ||||
| 2 | Garnet | Economic | Ore |
Apr 30, 2014 (A Wilson) - The garnet is almandine with 27 to32% spessartine. The degree of chemical evolution in granitic pegmatites situated in the southern part of Pelletier Township is generally low, although fertile pegmatitic granite units were locally recognized. Elevated Rb (1229 ppm) and Cs (40 ppm) was recovered from OGS sample 02-FWB-62
| Rank | Classification |
|---|---|
| 1 | Pegmatite |
Map - Hearst sheet, districts of Cochrane and Algoma, geological compilation series
Publication Number: P0397 Scale: 1:126,720 Date: 1997
Author: Bennett G., Brown D.D., George P.T., Leahy E.J.
Publisher Name: Ontario Dept. of Mines
Mono - Geology of the Hearst-Kapuskasing area
Publication Number: OFR5599 Scale: Date: 1986
Author: Berger B.R.
Publisher Name: Ontario Geological Survey
Compend - Summary of Field Work and Other Activities, 2002
Publication Number: OFR6100 Scale: Date: 2002
Author: Baker C.L., Debicki E.J., Kelly R.I., Parker J.R.
Publisher Name: Ontario Geological Survey
Map - Geological series, Precambrian geology, Caithness, and parts of Scholfield, Pelletier and Doherty townships, Hearst-Kapuskasing area, Algoma and Cochrane districts
Publication Number: P2961 Scale: 1:31,680 Date: 1986
Author: Berger B.R., MacMillan D.W., Roy P.L.
Publisher Name: Ontario Geological Survey
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
Mono - Fertile and Peraluminous Granites and Related Rare-Element Mineralization in Pegmatites, North-Central and Northeastern Superior Province
Publication Number: OFR6195 Scale: Date: 2006
Author: Breaks F.W., Selway J.B., Tindle A.G.
Publisher Name: Ontario Geological Survey
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