- SMDI #
- 0987
- Current Showing Name
- Grand Rapids Zn Occurrence
- Historical Showing Names
- Grand Rapids Zn Occurrence
- Company Name
- Project Name
- UTM Easting (NAD83 Z13)
- 476604.8600
- UTM Northing (NAD83 Z13)
- 6267515.1200
- NTS Sheet
- 074A11
- TRM (Township-Range-Meridian)
- 87-22-2
- Primary Commodities
- Zinc
- Associated Commodities
- Copper
- Discovery Type
- Outcrop Grab
- Status
- Occurrence: Primary Exploration
- Geological Details
- The showing is located on the west side of Lower Foster Lake at Grand Rapids.
In 1981, G. Ray mapped the lower Fposter Lake as the separation point between the Anderson Lake Inlier or foliated basement granitic rocks and unconformably overlying northeast-trending Wollaston Group semipelitic gneisses and schists which contain >25% biotite±hornblende (unit 3a).
A sample from a coarse-grained biotite schist inclusion in biotite granite gave 199 ppm Cu and 4871 ppm Zn; 0.3 to 0.4% Zn has been reported in biotite according to the assessment report.
- Geological Domain
- Wollaston
- Host Rocks
- Host Minerals
- Indicators
- Exploration History
- 9/9/1988 The area was sampled in 1966 by Great Plains Development Co. of Canada Ltd. and returned the value listed above (AF 74A11-0019).
- Production History
- Reserves and/or Resources