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Ontario Geological Survey
Permanent Link to this Record:
MDI31C15SE00428
| Record Name(s) | Marble-South Sherbrooke - 1989, Sample 1892 - 1989 |
|---|---|
| Related Record Type | Simple |
| Record Status | Discretionary Occurrence |
| Date Created | 2000-Feb-29 |
| Date Last Modified | 2022-Jan-05 |
| Created By | D Laidlaw |
| Revised By | A Wilson |
Primary Commodities: Marble (Structural Material)
Township or Area: South Sherbrooke
Latitude: 44° 51' 36.28" Longitude: -76° 30' 59.8"
UTM Zone: 18 Easting: 380177.21 Northing: 4968525.92 UTM Datum: NAD83
Resident Geologist District: Southern Ontario
NTS Grid: 31C15SE
Point Location Description: N/A
Location Method: Data Compilation
Access Description: Survey over relatively wide marble belt which trends roughly northeast through northern South Sherbrooke township. Sample points at: lots 19 and 20, conc. 9; lot 17, conc. 11; lot 20, conc. 9 & 10; lot 18, conc. 9.
Province: Grenville
Subprovince: Central Metasedimentary Belt
Terrane: Frontenac
Geological Age: Mesoproterozoic
| Rock Type | Rank | Composition | Texture | Relationship | Calcite Marble | 1 | Host |
|---|---|---|---|---|
| Granite | 1 | Granite | Adjacent | |
| Pegmatite | 3 | Intrudes |
Sep 18, 2015 (A Wilson) - Samples were taken from a relatively wide marble belt which trends roughly northeast through northern South Sherbrooke Township. Within the marble belt are concordant paragneiss units and semiconcordant granitic and pegmatitic bodies. The marble in the belt consists generally of fine- to medium-grained granoblastic calcitic marble. The marble in this area is fine grained and grey, with alternating light and dark grey laminations. More coarsely crystalline marble is generally white, with minor amounts of graphite and phlogopite. Small units of dolomitic marble and silicate segregations also occur locally. The silicate segregations occur within the marble as pods or blocks of white plagioclase-rich rock. Thin metasedimentary units cut the marble, striking roughly in an easterly direction. In the middle of the map area is a 300 to 350 m wide granite body that has not apparently altered the adjacent marbles.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Graphite | Economic | Gangue | ||||
| 2 | Phlogopite | Economic | Gangue | ||||
| 3 | Dolomite | Economic | Gangue |
Sep 18, 2015 (A Wilson) - Most of the samples taken from this marble belt (samples 493, 494, and 1880 to 1904) have low SiO2 contents, usually less than 2 weight percent. Most of the "calcitic marble" samples in this area are actually of dolomitic calcitic marble composition, with the MgO content ranging from 4 to 9 weight percent. Trace and metallic element contents are low in all samples in this belt.
| Rank | Classification |
|---|---|
| 1 | Industrial |
| Rank | Characteristic |
|---|---|
| 1 | Stratiform |
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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For detailed information regarding this mineral record please contact the Southern Ontario Resident Geologist District Office