On the geological-prospecting types of kimberlite pipes

The conducted research on geological structure and material composition of the Siberian platform kimberlites indicated the complexity and diversity of geologic-tectonic and paleogeographic conditions which should be considered when performing the prediction-prospecting works for diamonds in every particular region. The geological-geophysical and geomorphological occurence conditions of kimberlite diatremes determine the mode of their prediction and prospecting. The knowledge on the material composition of not only desired diatremes but also of sedimentary and magmatic formations enclosing and overlying diatremes is an important criterion for prospecting of kimberlite bodies in various geologic-tectonic conditions. Special attention should be paid to typomorphic features of both initial and newly-formed minerals in diatremes. Every diamondiferous region is characterized by a certain complex of typomorphic associations of primary and secondary minerals of kimberlites. The majority of kimberlite pipes are dominated by diamonds with an ultrabasic association of solid intrusion phases (olivine, chromite, pyrope, etc.).