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Eighteen diamond samples from the A154 South kimberlite pipe (Diavik Mine), Slave Craton, Northwest Territories (Canada); sixteen diamond samples from the Lynx kimberlite dyke, Superior Craton, Quebec (Canada) and twelve diamond samples from the Kelsey Lake kimberlite pipe, Wyoming Craton, Colorado (USA), were cut through the core-zones, polished, imaged by cathodoluminescence (CL), and analyzed by...
Results are presented here of an in-situ study of diamonds from the A154 South kimberlite pipe at the Diavik diamond mine, Northwest Territories, Canada. One hundred and ten diamonds were selected from run of mine production on the basis of morphology and visible inclusions. Diamonds that crystallized as cubes have a higher incidence of fluorescence in response to UV light than those that have crystallized...
Trace element characteristics of seven coesite-bearing eclogitic xenoliths from the Roberts Victor kimberlite demonstrate that this suite of eclogites originated as gabbroic cumulates in oceanic crust that was subsequently subducted. All but one of the garnets show positive Eu anomalies, accompanied by a flat heavy rare earth pattern, which is atypical of garnet, but characteristic of plagioclase,...
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