A discussion of the most important petrographic features of kimberlite is presented and a new definition of kimberlite is proposed. The discussion emphasizes those features of kimberlite which are of petrogenetic significance and points out that alnoitic and lamprophyric rocks associated with alkaline rock-carbonatite complexes are not true kimberlites. Consideration of the proposed relation of kimberlites to mica peridotites, carbonatites, basalts, potassic volcanic rocks, and melilitites reveals that kimberlites are not simply or closely related genetically to any of these rocks.
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Roger H. Mitchell (1970) studied this question.
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