ENGOGENOUS CRITERIA OF DIAMOND OCCURRENCE FORECASTING (A CASE STUDY OF THE CENTRAL-SIBERIAN SUBPROVINCE)

I. I. Antipin, I. Iv. Antipin

AK Alrosa Enterprise of Research and Geological Exploration, Mirny, Sakha (Yakutia) Republic, Russia

The authors have analysed the traditional diamond-targeted division into mineragenic regions and revealed its shortcomings. A new approach to division into mineragenic regions was applied, based on the hypothesis of formation of diamond-bearing rocks in the crust-mantle diapirs derived from small and medium plumes, and the empirical analysis of geophysical and tectonic data on reference kimberlite fields in the Central-Siberian subprovince. Criteria were determined to forecast the occurrence of medium-scale diamond-bearing targets. The hierarchical characteristics and boundaries of targets were suggested and geologically substantiated, based on which geological-genetic models of kimberlite formation and intrusion can be developed.

Key words: the Central-Siberian diamond-bearing subprovince, kimberlites, kimberlite field forecasting, thermochemical plume, core-mantle diaper, limeament zone.

DOI 10.20403/2078-0575-2017-2-79-91 

Download PDF