Specific features of diamonds from modern placers in the zone of high-productive kimberlite diatremes distribution

Abstract

Zoning of areas by degree of their prospectivity was carried out by outlined complex investigations and generalization of available material on investigating diamond from modern placers of Central-Siberian sub-province and their comparison with crystals from kimberlite bodies of this region. The complex of features of diamonds from the placers of the described sub-province testifies by morphology, coloring, hard inclusions, internal structure, photoluminescence and impurity composition about multiplicity of original sources and availability of still undiscovered kimberlite bodies within diamondiferous regions. Polygeny of diamond mineralogical associations is noted in modern placers of individual regions with broad occurrence of placer diamondiferousness, reaching commercial concentrations. Utilization of typomorphic features of crystals for reconstruction of exogenous history of diamonds on the way from primary sources to the places of modern location in placers, for paleogeographial reconstructions of ancient productive thick layers’ reconstructions and clearing out directions of diamondiferous material drift, which will promote prospecting of their primary sources, has important significance.

Keywords

• diamonds
• modern thick layers
• diamondiferous regions
• placers
• siberian platform