The aeromagnetic anomaly high at Bigspruce lake N.W.T. is located over an alkaline and carbonatite complex. Approximately two-thirds of this complex is submerged, but sufficient rock is exposed on the shores and islets to reconstruct the original intrusive form and sequence.
The rock-types are distributed in five geographic and petrographic centres showing a successive southerly migration. These are -
- Centre 1
- saturated diorite, gabbro, olivine-magnetite-pyroxe...
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- University of Oxford
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- Martineau, M. P.
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- This thesis was digitised thanks to the generosity of Dr Leonard Polonsky
The petrology and geochemistry of the Bigspruce Lake syenite complex N.W.T. Canada
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