Ontario Geological Survey
Permanent Link to this Record:
MDI31F03NW00067
| Record Name(s) | Simpson Lake - 2000 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Producing Mine |
| Date Created | 2001-Mar-21 |
| Date Last Modified | 2024-Feb-15 |
| Created By | |
| Revised By |
Primary Commodities: Marble (Building Stone), Dolomite (Building Stone)
Township or Area: Ashby
Latitude: 45° 9' 32.22" Longitude: -77° 24' 14.05"
UTM Zone: 18 Easting: 311060.532 Northing: 5003419.148 UTM Datum: NAD83
Resident Geologist District: Southern Ontario
NTS Grid: 31F03NW
Point Location Description: North shore of Simpson Lake
Location Method: Field Visit
Access Description: From Denbigh, travel NW on highway 500 to Hardwood Lake. From the junction, continue on highway 500 SW for 1.5 miles to a gravel road, leading south. Follow this road approximately 3.5 miles to a trail. The claim group can be accessed by this trail.
The property was first worked by Mr. A. Dubblestein who completed basic prospecting in this area for white dolomitic marble. 6 samples were taken from the claim group and were analysed for 12 elements. The property was optioned by 1262646 Ontario Inc. in the summer of 2001. A bulk sample was partially completed in the fall. 2003: GeoVector Management Inc. performed geological mapping, and Industrial Mineral Testing and Marketing. 2007-2008: Coloured Aggregates Inc. completed sampling, assaying and analyses, and diamond drilling
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 31F03NW2005 | 31F03NW2005 | |
| 31F03NW2008 | 31F03NW2008 | |
| 20000002238 | 20000002238 | |
| 20000013511 | 20000013511 |
Province: Grenville
Subprovince: Central Metasedimentary Belt
Terrane: Bancroft
Geological Age: Mesoproterozoic
Dec 07, 2005 (C Papertzian) - The prospect is in a dolomitic marble belt, known as the Dungannon formation, and contains some silicated marble. The silicates may include chondrodite, diopside, phlogopite, plagioclase and tremolite. The belt trends north west including Ashden and Simpson Lakes. It is truncated on the eastern shore of Len Lake. 'This is the marble member forming the core of the Mayo anticline where it crosses the township boundary between Mayo and Ashby. Because this fold plunges northeast, the outcrop of the marble narrows rapidly, and soon after passing into Ashby, the marble disappears below the overlying Hermon Formation. The plunge depression ends near Len Lake. (GR 26, A.M. Evans, p 8)'. The dolomitic marble observed around Simpson Lake was pure white. 'Within the marble areas, dolomite appears to be irregularly distributed' (GR 26, A.M. Evans, p 16).'
| Rock Type | Rank | Composition | Texture | Relationship | Dolomite Marble | 1 | Dolomite & Calcitic Marbles | Metamorphosed | Is |
|---|---|---|---|---|
| Amphibolite | 2 | Greywacke, Mudstone | Massive, fine to medium-grained | Adjacent |
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Dolomite | Economic | Ore | ||||
| 2 | Calcite | Economic | Ore |
Feb 15, 2024 (Nazha Sabiri) - White coarse-grained, dolomitic marble used for the production of specialty aggregate and decorative stones. Samples assayed showed 30 to 31% for CaO and 20-21% for MgO (File 20000002238). Product has f high brightness 94.5 to 96.5 % and low Yellowness index from 0.02 to 0.3 (31F03NW2008)
| Rank | Classification |
|---|---|
| 1 | Decorative Aggregate |
| Rank | Characteristic |
|---|---|
| 1 | Massive |
Date: Mar 21, 2001
Geologist: C Papertzian
Notes: This prospect was visited on July 11, 2001 with the claim holder. A grid had not been cut as of that date. The claim holder showed where the whitest dolomite occurred on the claim group and where the original 6 samples were taken from. Since no mapping had been completed the size of the area of white dolomitic marble could not accurately be determined.
Map - Ashby Township, County of Lennox and Addington, Ontario
Publication Number: M2031 Scale: 1:31,680 Date: 1997
Author: Evans A.M., Appleyard E.C.
Publisher Name: Ontario Dept. of Mines
Location:
MonoMap - Geology of Ashby and Denbigh townships
Publication Number: R026 Date: 1997
Author: Evans A.M.
Publisher Name: Ontario Dept. of Mines
Location:
We are continuously updating our assessment file / technical report information. If you notice errors in the data, please contact us.
Please review our Terms of Use agreement for this data product.
For detailed information regarding this mineral record please contact the Southern Ontario Resident Geologist District Office