Lithologic-mineralogical features of ancient diamondiferous thicknesses in the regions of kimberlite magmatism development

Abstract

Complex research of ancient crusts of weathering on terrigenous-carbonate rocks, dolerites, tufogene formations and kimberlites, as well as products of their rewashing in Mesozoic sedimentary thick layers of main diamondiferous regions of the Siberian platform allowed restoring specific features of their structural-formation generation Results of investigations allowed carrying out zoning of the territory on the area of the following distinction of Middle-Upper Triassic crusts of weathering and products of their redeposition: a) unfavorable (lower parts of paleo-depressions); b) favorable (upper parts of paleo-depressions); c) highly favorable (slopes of these structures). The identified typomorphic features of various minerals in various types of crusts of weathering may be successfully used when trying to determine their (including diamondiferous material) impact on various levels of Mesozoic sedimentary thick layers of the region