Ontario Geological Survey
Permanent Link to this Record:
MDI41N15NW00088
| Record Name(s) | Grace Kimberlite Dike - 2000 |
|---|---|
| Related Record Type | Simple |
| Record Status | Occurrence |
| Date Created | 2002-Oct-09 |
| Date Last Modified | 2022-Jan-05 |
| Created By | A Wilson |
| Revised By | A Wilson |
Primary Commodities: Kimberlite
Township or Area: McMurray
Latitude: 47° 57' 7.54" Longitude: -84° 44' 56.94"
UTM Zone: 16 Easting: 668054.26 Northing: 5313427.61 UTM Datum: NAD83
Resident Geologist District: Sault Ste. Marie
NTS Grid: 41N15NW
Point Location Description: Dike located in trench approximately 50 m north of caved stope.
Location Method: Field Visit with GPS
Access Description: Travel south on the Surluga road from the junction of hwy 101 for 6 km. The mine site is located on the west side of the road.
2000-2002: Tri Origin Exploration Ltd. - data compilation, prospecting, sampling, ground geophysics, 6 ddh.
Province: Superior
Subprovince: Wawa
Terrane: Wawa-Abitibi
Belt: Michipicoten
Geological Age: Archean
| Rock Type | Rank | Composition | Texture | Relationship | Kimberlite-Unsubdivided | 1 | Host |
|---|---|---|---|---|
| Intermediate Tuff | 2 | Andesite To Dacite | Tuff, Lapilli Tuff | Near |
Dec 07, 2005 (A Wilson) - Two kimberlite dikes are exposed at surface in an old exploration trench just north of the caved stoped at the Grace Mine. The southernmost dike is 1 m wide and 20 ft in length. The northernmost dike is exposed for 35 ft and is 2 ft wide. Both dikes are rusty brown to black on the weathered surface and have a knobby surface texture. The fragment content in the dikes ranges from 10 - 25% with some fragments up to 4 cm in size. The southernmost dike hosts a central zone of rounded and streamlined inclusions. The southernmost dike is crosscut by numerous narrow quartz veinlets that extend outwards into host rock. Geochemical analysis of kimberlite dikes has suggested that they are type II kimberlites (orangeites).
| Shape | Length | Thickness | Depth | Strike | Dip | Plunge | Trend | Age | Reference |
|---|---|---|---|---|---|---|---|---|---|
| Regular | 6 | .6 | 38 | 90 |
Date: Oct 09, 2002
Geologist: A Wilson
Notes: The property was examined by the author on September 18, 2002. At that time samples of both dikes were taken for geochemical and thin section analysis.
Book - TIR ORIGIN EXPLORATION LTE.
Publication Number: clippings Scale: Date: 2000
Author:
Publisher Name:
Map - Geological series, McMurray Township and parts of surrounding townships, formerly Township 29, Range 23, District of Algoma
Publication Number: P0828 Scale: 1:15,840 Date: 1973
Author: Rupert R.J.
Publisher Name: Ontario Division of Mines
Map - Geological series, Precambrian geology of McMurray Township, Wawa area, Algoma District
Publication Number: P2441 Scale: 1:15,840 Date: 1982
Author: Sage R.P., Sawitzky E., Turner J., Leeselleur P., Sagle E.
Publisher Name: Ontario Geological Survey
Map - Precambrian Geology, Michipicoten Greenstone Belt, Central Portion
Publication Number: P3303 Scale: 1:50,000 Date: 1994
Author: Sage R.P.
Publisher Name: Ontario Geological Survey
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For detailed information regarding this mineral record please contact the Sault Ste. Marie Resident Geologist District Office