stripes
Occurrence number:
031-00-043
Country:
Canada
Region:
Ontario
Location:
Longitude: -92, Latitude: 54.8
Carbonatite:
Yes
The intrusion does not outcrop, but boulders of carbonatite and alkaline rocks have been found on the shore of Carb Lake. A strong, approximately circular magnetic anomaly has a diameter of about 3 km (Ferguson, 1971, Map). Drilling has indicated that the central area is underlain principally by carbonatite of about equal proportions of calcite and dolomite, with about 20% apatite, magnetite, biotite, pyrochlore and melanocratic rock fragments. Bands of the latter rock type, which appear to be vertical, consist of 30-60% magnetite, with apatite, a sodic amphibole, biotite, pyrite and pyrochlore. Fluorite, vermiculite, synchisite and ancylite have been identified.
Economic:
Pyrochlore is widely disseminated, and the area has been investigated for its economic potential. Very high REE values have been found locally (72%).
References:
FERGUSON, S.A. 1971. Columbium (niobium) deposits of Ontario. Mineral Resources Circular, Ontario Department of Mines and Northern Affairs, 14: 1-58.
Location: