Ontario Geological Survey
Permanent Link to this Record:
MDI31C16SW00046
| Record Name(s) | Brooke - 1989, Sample 1240 - 1989 |
|---|---|
| Related Record Type | Simple |
| Record Status | Discretionary Occurrence |
| Date Created | 1990-Oct-10 |
| Date Last Modified | 2022-Jan-05 |
| Created By | Q Unknown |
| Revised By | A Wilson |
Primary Commodities: Marble (Building Stone)
Township or Area: Bathurst
Latitude: 44° 51' 4.27" Longitude: -76° 26' 55.09"
UTM Zone: 18 Easting: 385530 Northing: 4967440 UTM Datum: NAD83
Resident Geologist District: Southern Ontario
NTS Grid: 31C16SW
Point Location Description: Point 1.25 km west of Brooke.
Location Method: Data Compilation
Access Description: Point 1.25 km west of Brooke
Province: Grenville
Geological Age: Mesoproterozoic
| Rock Type | Rank | Composition | Texture | Relationship | Marble | 1 | Calcitic | Is |
|---|
Sep 07, 2016 (A Wilson) - All four samples were taken from a stratigraphically complex marble zone which trends roughly northeast. Within and around the zone are small intrusions of granite, diorite, and syenite. Also within the marble unit are both syenite-marble and amphibolite-marble migmatites. 1240/1241—Within this detailed map area (Figure73) are a number of north-trending marble units, each normally up to a maximum width of 125 m. On a large scale these units make up two distinctive migmatite units; one is a granite-marble migmatite, and the other is an amphibolite-marble migmatite. Granitic units are relatively wide (100 to 150 m), while the metasedimentary amphibolite and paragneiss units tend to be comparatively thin (50 m). Marble in the area is impure, much of it containing clots and disseminations of serpentine and diopside. Dolomitic marble occurs within a calcitic unit and is discontinuous.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Serpentine | Economic | Ore | ||||
| 2 | Diopside | Economic | Ore |
Mono - Geochemistry of Grenville marble in southeastern Ontario
Publication Number: MDC028 Scale: Date: 1989
Author: Grant W.T., Papertzian V.C., Kingston P.W.
Publisher Name: Ontario Geological Survey
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