stripes
Occurrence number:
031-00-057
Country:
Canada
Region:
Ontario
Location:
Longitude: -83.42, Latitude: 50.33
Carbonatite:
Yes
Drilling during 1981 into a long -nown aeromagnetic anomaly proved the presence of three carbonatite stocks, two of which probably coalesce. The area forms a distinct topographic depression which is covered by 30-90 m of glacial till. Associated with the carbonatite are ultramafic rocks described as "serpentinized olivine-calcite-phlogopite kimberlitic rocks and ultrabasic porphyry diatreme breccia" (Potapoff, in press). Fresh carbonatite averages 80% calcite or dolomite, 9% apatite, 10% magnetite, and pyrochlore, biotite, phlogopite and pyrite.
Economic:
Overlying the carbonatite are leached zones enriched in phosphate (apatite, francolite and florencite) and pyrochlore. Proven, probable and possible reserves so far outlined total 145 million tonnes averaging 20.1% P2O5 and 0.35% Nl205 (Potapoff,in press).
References:
Potapoff, in press.
SAGE, R.P. 1979. Alkalic rocks carbonatite complexes. Miscellaneous Paper, Ontario Geological Survey, 90: 70-5.
Location: