ABOUT PRIMARY DIAMONDIFEROUSNESS OF ANCIENT PLATFORMS

As a result of carried out research and summary of the materials on specific features of diamonds, on the example of the Siberian platform, conclusions were made that indications exist at all levels of their location: from kimberlite – provinces, sub-provinces, fields, diatremes, to ore columns. Population of diamond varieties in kimberlite rocks forms not paragenetic, but para-steric associations, related with generality of their co-location in kimberlites. Morphological criteria of kimberlite diamondiferousness were formulated depending on quantitative content of rounded diamonds in them. Sufficient differences in diamondiferousness of kimberlites were not revealed to the explored depth of diatremes (to 1 200 m). Conclusion about absence of horizontal concentric zonality in the change of typomorphic features of diamonds was made.