Material aspects of kimberlite rocks productivity

Abstract

Most of investigated kimberlite diatremes of the represent multiphase pipes. Each magmatic phase of intrusion, formed inside diatremes, is composed by kimberlites with specific petrographic and petrochemical type possessing a number of stable, weakly changing with depth typomorphic features. Carried out investigations indicated sufficient distinctions in diamondiferousness of different intrusion phases of kimberlites, which is stipulated by different level of emplacement and duration of functioning of forming them magmatic hotbeds, physical-chemical properties of initial components, as well as by velocity of ascent and character of kimberlite magma advance in the process of different kimberlite-formation stages. Kimberlite breccias of completion stages of pipes formation are most productive in comparison with porphyritic kimberlites of early intrusive penetration phases. When assessing productivity of kimberlite pipes it is necessary to consider real correlations of intrusive and explosive processes of kimberlite-formation in diatremes, which usually change in time.