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Ontario Geological Survey
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MDI31E07NW00003
| Record Name(s) | Fraser West Quarry - 1989 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Prospect |
| Date Created | 1992-Feb-03 |
| Date Last Modified | 2024-Apr-08 |
| Created By | |
| Revised By |
Primary Commodities: Gneiss
Secondary Commodities: Uranium
Township or Area: Finlayson
Latitude: 45° 28' 36.2" Longitude: -78° 55' 38.26"
UTM Zone: 17 Easting: 662000.002 Northing: 5038000.002 UTM Datum: NAD83
Resident Geologist District: Southern Ontario
NTS Grid: 31E07NW
Point Location Description: precise
Location Method: Field Visit with GPS
Access Description: On the southeast side of the road, 1.45 km east of the Tasso Lake bridge, which is 19.7 km. north of Highway 60 on Muskoka Road 8.
circa 1989: pitting, aggregate extraction
Province: Grenville
Subprovince: Central Gneiss Belt
Geological Age: Mesoproterozoic
| Rock Type | Rank | Composition | Texture | Relationship | Gneiss-Unsubdivided | 1 | Monzogranite | Is |
|---|
Aug 15, 2011 (A Wilson) - Interlayered pink, fine- to medium-grained paragneiss (meta-arkose) and biotite-amphibolite intruded by closely spaced coarse-grained, allanite-bearing, granitic pegmatite dikes. The pink gneiss has a penetrative foliation indicated by aligned hornblende and biotite grains. In places it grades to a white colour, it has the appearance of a sandstone. Amphibolite seams, which constitute about 15% of the exposed rock in the quarry face range in thickness from 1 mm to 30 cm, and are spaced from 1 cm to 1 m apart. The pegmatites, which make up about 15% of the quarry face, are commonly zoned, with a medium-grained, pale margin and a core consisting mainly of coarse-grained, pink, potassium feldspar, with quartz, plagioclase, biotite, and minor allanite, magnetite, pyrite and pyrrhotite. Two sets of pegmatites occur: one set bearing 007° , and spaced 5 cm - 15 cm; and the second set bearing 034°, spaced 15 cm - l m. The second set offsets the first by about 2-4 cm.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Allanite | Economic | Ore |
Aug 15, 2011 (A Wilson) - Many small allanite crystals can be seen with their distinctive red radiation haloes. Most are about 2 mm in size but range up to 6 mm. They are more common adjacent to the pegmatites. The number of pegmatite intrusions makes this area unsuitable for flagstone extraction, but the rock is attractive and is used in landscaping, and other decorative applications. Pegmatite is much less in evidence at the other sites along this ridge, and its presence here is probably anomalous.
| Rank | Classification |
|---|---|
| 1 | Decorative Aggregate |
Mono - Gneisses of the Parry Sound-Muskoka area: flagstone resources
Publication Number: OFR5725 Page: 49-50 Date: 1989
Author: Fouts C.R., Marmont C.
Publisher Name: Ontario Geological Survey
Location:
Map - Precambrian Geology, Kawagama Lake Area
Publication Number: P3525 Scale: 1:50,000 Date: 2003
Author: Lumbers S.B., Vertolli V.M.
Publisher Name: Ontario Geological Survey
Location:
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