Mineralogical-geochemical and geodynamic system approach to analysis of diamond-bearing and mineragenic division into district of platforms
The conditions of diamond formation in the subduction zones in which exogenous sources of chemical elements of diamond immersed in the mantle along the rims of the convective cell in the Precambrian are substantiated. Convection caused the structure of the diamond-bearing space in the mantle in the form of an inverted cone, lateral zoning of the bodies at the level of the platform cover and the lateral limits of a mineragenic province. The structures of the mantle medium delive­ry to the surface developed at a platform phase along the lineaments having a fractal structure with periodic alternation of kimberlite regions, fields, bunches of pipes with a certain interval. Beyond the mineragenic province, no primary diamond deposits occur but economic placers can exist in this area because of the far exogenous diamond transfer. The real, geodynamic and geomorphological criteria of the mineragenic diamondiferous province delineation are offered. In addition, the authors showed an example confirming the forecast of the pipe bunches previously identified based on their space periodicity criteria.