About Specific Features of Hypergene Formations of Kimberlites Brought to Ancient Sedimentary Thick Layers of Diamondiferous Regions

Abstract

On the example of Mesozoic and Paleozoik deposits of one of the main diamondiferous regions of the Siberian platform basic suppliers of terrigenous material to ancient diamondiferous placers under formation and their occurrences are characterized. Special attention is paid to characteristics of local sources of allothigenous material removal to sedimentation basins of the said period, the main of which were Middle-Late Triassic crusts of weathering on terrigenous-carbonate rocks, formations of trappean origin (dolerites, tuffs, tufogene thick layers) and kimberlites. The obtained features of the mineral composition of the weathering crust of various rocks are preferably used in paleogeographic reconstructions in diamond-bearing regions, in particular for  determining the sources of terrigenous material