Ontario Geological Survey
Permanent Link to this Record:
MDI000000001944
| Record Name(s) | Anaconda Road Pegmatite - 2002, 02-Fwb-55 - 1997, Odman Lake - 2002 |
|---|---|
| Related Record Type | |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 2016-Jul-06 |
| Date Last Modified | 2023-May-24 |
| Created By | |
| Revised By |
Primary Commodities: Rubidium
Secondary Commodities: Cesium
Township or Area: O Sullivan Lake Area
Latitude: 50° 28' 5.93" Longitude: -87° 7' 16.5"
UTM Zone: 16 Easting: 491395 Northing: 5590709.01 UTM Datum: NAD83
Resident Geologist District: Thunder Bay North
NTS Grid: 42L06NE
Point Location Description: OFR6195 p. 71
Location Method: Data Compilation
Access Description: Travel west 25 km on Road 643 from the community of Aroland. Turn right onto the Anaconda forestry haulage road and proceed north for 8.3 km.
2002: OGS staff carried out sampling. No assessment reports were found on file.
Province: Superior
Subprovince: English River
Geological Age: Archean
| Rock Type | Rank | Composition | Texture | Relationship | Pegmatite | 1 | Garnet-Muscovite Potassic Pegmatite | Host |
|---|---|---|---|---|
| Wacke | 2 | Feldspathic Wacke | Near |
Dec 17, 2020 (Andrew Tims) - The potassic pegmatite, hosted by unmigmatized metawacke, contains coarsely graphic, white potassium feldspar, green muscovite and garnet up to 0.5 cm in diameter. The orange-brown to orange-pink garnet is almandine with 29% spessartine.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Feldspar | Economic | Gangue | ||||
| 2 | Muscovite | Economic | Gangue | ||||
| 3 | Garnet | Economic | Gangue |
Jul 06, 2016 (Andrew Tims) - Bulk composition of the pegmatite core contains elevated Rb (2418 ppm) and Cs (147 ppm) and low K/Rb (44) and K/Cs (727) ratios that indicate a fertile granite-pegmatite system.
Dec 17, 2020 (Therese Pettigrew) - A small, white, pegmatite dike, mostly covered in a 1 by 3 m outcrop on the west side of the Anaconda Road consists of massive garnet-muscovite potassic pegmatite. The potassic pegmatite, hosted by unmigmatized metawacke, contains coarsely graphic, white potassium feldspar, green muscovite and garnet up to 0.5 cm in diameter. The orange-brown to orange-pink garnet is almandine with 29% spessartine. The garnet has a manganese-rich core and an iron-rich rim. Blocky potassium feldspar from the dike centre contains elevated Rb (2418 ppm) and Cs (147 ppm) and low K/Rb (44) and K/Cs (727) ratios that represent the most evolved compositions found in the Abamasagi Lake Road area and compare with fertile granite-pegmatite systems elsewhere as at Separation Rapids pegmatite field (Breaks et al., 2006).
| Rank | Classification |
|---|---|
| 1 | Pegmatite |
Mono - Fertile and Peraluminous Granites and Related Rare-Element Mineralization in Pegmatites, North-Central and Northeastern Superior Province
Publication Number: OFR6195 Page: 71 Date: 2006
Author: Breaks F.W., Selway J.B., Tindle A.G.
Publisher Name: Ontario Geological Survey
Location:
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