Interdependence tipomorfnykh of features of diamonds with certain structures of minerals from kimberlites

Abstract

In this work results of a statistical analysis of compositions of indicator minerals of kimberlites (IMK) and frequencies of occurrence of gabitus forms, colors of a photoluminescenсe of diamonds are presented. A comprehensive approach to studying of structures of IMK in cluster areas of their structures and properties of diamonds from kimberlites includes use cluster (R and Q methods) and the factor analysis of data of methods. In work for each studied kimberlite tube their characteristic cluster areas of structures of IMK for which the significant correlation decided on particular physical properties of diamonds are calculated. All calculations are executed from random and representative samples of compositions of grains of minerals from kimberlites of tubes. From results of the analysis applied values of the received estimates, IMK consisting in use as search sign of kimberlite diamond fields of the fact of detection of certain cluster groups of structures which are their search characteristic criteria for each studied kimberlite body follow. It is revealed that high and significant coefficients of correlation between frequencies of occurrence of mean values of structures of the IMK cluster groups and also definite forms of a habitus of crystals and color of a photoluminescenсe of diamonds, efficiency of objects on IMK and diamonds are observed only in sets of tubes which are localized within the concrete kimberlite field. In work it is established that the geochemical situation, existing throughout its growth, has important effect on physical properties of a lattice of crystals of diamonds also. It is established that presence of minerals of a titanium and iron, in the course of body height of a crystal of diamond to lead slopes to the shift of forms of crystals towards ORD less often than LRD of forms in a combination to the increased maintenance of crystals to a green and flavovirent photoluminescenсe.