Ontario Geological Survey
Permanent Link to this Record:
MDI31C09NW00023
| Record Name(s) | Black Lake - 1989 |
|---|---|
| Related Record Type | Simple |
| Record Status | Discretionary Occurrence |
| Date Created | 1990-Oct-15 |
| Date Last Modified | 2022-Jan-05 |
| Created By | Q Unknown |
| Revised By | A Wilson |
Primary Commodities: Marble (Building Stone)
Township or Area: Burgess
Latitude: 44° 44' 12.43" Longitude: -76° 19' 37.67"
UTM Zone: 18 Easting: 394924 Northing: 4954568.01 UTM Datum: NAD83
Resident Geologist District: Southern Ontario
NTS Grid: 31C09NW
Point Location Description: Point 5.5 km northwest of Sand Island.
Location Method: Data Compilation
Access Description: Along a gravel road, 1 km south of Black Lake.
Province: Grenville
Subprovince: Central Metasedimentary Belt
Terrane: Frontenac
Geological Age: Mesoproterozoic
| Rock Type | Rank | Composition | Texture | Relationship | Marble | 1 | Calcitic | Host |
|---|---|---|---|---|
| Monzonite | 2 | Monzonite | Intrudes | |
| Terrigenous-Clastic-Unsubdivided | 3 | Adjacent |
Sep 10, 2015 (A Wilson) - The marble in this area is intruded by red monzonite displaying a conical zonation from red (away from the marble) to white (at the marble-monzonite contact), near the intrusive margins. North of the marble are migmatites made up of granite and metasediments. The detailed map area shows that relatively little marble occurs in the area. Monzonite makes up the largest part of the bedrock and contains numerous pods and lenses of rusty metasediment and marble. Marble and metasedimentary units tend to be continous toward the western margins of the area. Marble is white and contains varying amounts of graphite and phlogopite. Some small zones have greater than 20 percent silicate material. Dolomitic marble occurs near the northern limit of the map, adjacent to the rusty metasediments.
Sep 10, 2015 (A Wilson) - Geochemisty of the marble is inconsistent. A few samples are of calcitic marble type, but the majorigy have a wide range of CAO and MgO values with the CaO/MgO values ranging from 1.4 to 40.
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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