Ontario Geological Survey
Permanent Link to this Record:
MDI31C15SE00112
| Record Name(s) | Deer Lake Inlet - 1989 |
|---|---|
| Related Record Type | Simple |
| Record Status | Occurrence |
| Date Created | 1991-Jun-25 |
| Date Last Modified | 2022-Jan-05 |
| Created By | Q Unknown |
| Revised By | A Wilson |
Primary Commodities: Anorthosite, Garnet (Gemstones)
Township or Area: South Sherbrooke, South Sherbrooke
Latitude: 44° 46' 50.71" Longitude: -76° 33' 43.01"
UTM Zone: 18 Easting: 376426 Northing: 4959782 UTM Datum: NAD83
Resident Geologist District: Southern Ontario
NTS Grid: 31C15SE
Point Location Description: General
Location Method: Data Compilation
Access Description: Inlet of Deer Lake from Rock Lake.
Province: Grenville
Subprovince: Central Metasedimentary Belt
Terrane: Frontenac
Geological Age: Mesoproterozoic
| Rock Type | Rank | Composition | Texture | Relationship | Gabbro | 1 | Anorthositic Gabbro | Host |
|---|---|---|---|---|
| Anorthosite | 2 | Contains |
Sep 19, 2015 (A Wilson) - The rock type Is composed primarily of anorthosite and anorthositic gabbro. Large areas contain >90% feldspar with minor amounts of pyroxene. This body is very massive, especially in its interior. The anorthositic gabbro is interlayered with varied amounts of medium to fine-grained, dark weathering horneblende gabbro. This is a dark bluish-grey anorthosite of the Lanark-Oso mafic intrusion. It is medium-grained, generally massive and contains mafic inclusions which appear to have parallel alignment.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Anorthite | Economic | Ore | ||||
| 2 | Corundum | Economic | Ore |
Sep 19, 2015 (A Wilson) - Chemical analysis of eight samples of anorthosite show the purest phases to contain 30-33% Al2O3. Corundum is limited to discrete zones. In outcrop, the corundum is excellently formed, coarse-grained, and euhedral.
| Rank | Characteristic |
|---|---|
| 1 | Disseminated |
Mono - Building stone potential in eastern Ontario
Publication Number: OFR5706 Scale: Date: 1989
Author: LeBaron P.S., Verschuren C.P., Papertzian V.C., Kingston P.W., Chevrier R.L.
Publisher Name: Ontario Geological Survey
Map - Sharbot Lake, southern Ontario
Publication Number: M2471 Scale: 1:31,680 Date: 1985
Author: Wolff J.M.
Publisher Name: Ontario Geological Survey
Map - Precambrian Geology, Sharbot Lake Area
Publication Number: P3440 Scale: 1:50,000 Date: 2001
Author: Easton R.M.
Publisher Name: Ontario Geological Survey
MonoMap - Geology of the Sharbot Lake area, Frontenac and Lanark counties, southeastern Ontario
Publication Number: R228 Scale: Date: 1985
Author: Wolff J.M.
Publisher Name: Ontario Geological Survey
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For detailed information regarding this mineral record please contact the Southern Ontario Resident Geologist District Office