Ontario Geological Survey
Permanent Link to this Record:
MDI31F03NW00016
Record Name(s) | Crawford Prospect - 1984 |
---|---|
Related Record Type | Simple |
Related Record(s) | |
Record Status | Occurrence |
Date Created | 1991-Feb-25 |
Date Last Modified | 2023-Mar-22 |
Created By | |
Revised By |
Primary Commodities: Vermiculite, Tourmaline
Township or Area: Lyndoch
Latitude: 45° 12' 13.07" Longitude: -77° 22' 30.79"
UTM Zone: 18 Easting: 313461.001 Northing: 5008316.005 UTM Datum: NAD83
Resident Geologist District: Southern Ontario
NTS Grid: 31F03NW
Point Location Description: approximate
Location Method: Based on Assessment
Access Description: 1.6 km SE of Bruceton.
1982-84: R. Crawford: mapping, prospecting, stripping, trenching, DD, radiometric survey, ground geophysics 1996: R. Crawford: stripping, testing
Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
---|---|---|
31F03NW0006 | 31F03NW0006 | 31F03NW0006 |
31F03NW9420 | 31F03NW9420 | 31F03NW9420 |
31F03NW9421 | 31F03NW9421 | 31F03NW9421 |
Province: Grenville
Subprovince: Central Metasedimentary Belt
Geological Age: Mesoproterozoic
Rock Type | Rank | Composition | Texture | Relationship | Mudstone | 1 | Mudstone | Contains |
---|
Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
---|---|---|---|---|---|---|---|
1 | Vermiculite | Economic | Ore |
Jul 15, 2011 (A Wilson) - The vermiculite ranges in size from 3mm to 1 inch in size and is estimated to comprise 10-15% of the rock. Vermiculite also occurs in narrow veins in the western two-thirds of the stripping. These are sheeted veins, trending easterly, parallel to the long dimension of the stripping. They occur across the full north-south width exposed, including the southerly limit of the southwesterly-trending side-stripping. Vermiculite in the veins is coarse- to very coarse-grained. Very coarse books of partly altered biotite or dark phlogopite may also occur in places. No other minerals were noted in the veins, which appear to be developed along steeply-dipping or vertical joints. Some of the vermiculite is light in colour, and fairly close examination is required to spot it. Close examination is also necessary for the darker vermiculite when intermixed with dark amphibole. The most common colour is golden-amber, but there are many others. Exfoliated colours tend to be lighter than the original. A silver to silver-light tan colour is common in the exfoliated material.
File - Correspondence and map 1987
Publication Number: N/A Date: 2003
Author: R. Crawford communication
Publisher Name:
Location: Tweed office deposit files
Map - Brudenell-Raglan area, County of Renfrew, Ontario
Publication Number: M1953-02 Scale: 1:63,360 Date: 1997
Author: Hewitt D.F.
Publisher Name: Ontario Dept. of Mines
Location:
Map - Barry's Bay, Precambrian geology
Publication Number: M2461 Scale: 1:100,000 Date: 1983
Author: Lumbers S.B.
Publisher Name: Ontario Geological Survey
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