Normative Quantities of Calcite and Dolomite in Yakutian Kimberlites ( Udachnaya Pipe as Case in Point )

Exemplified by the kimberlitic Udachnaya pipe, data on distribution and genesis of calcite and dolomite are given for the first time. Secondary occurrences of these minerals connected first of all with the substance composition of kimberlites affected by the host pipes of carbonate and terrigenous-carbonate series have been shown to be dominant in kimberlites of Yakutia. The noted characteristics of the distribution of calcite and dolomite can be succesfully used both for more precise determination of geological pipe structure and for technological improvement of kimberlite refinement.