Petrological and geochemical characteristics of the basites of the Tenkelyakh area

The study of the material composition of Middle Paleozoic basites from the Tenkelyakh area, located within the Vilyui-Markha dike belt in the eastern part of the Siberian platform was made. The basites of the region are characterized by an increased content of titanium, potassium, phosphorus, and incompatible elements and by a significant differentiation of REE (La / Yb) n = 5.5-7.0, which are typical features of Devonian basites. Comparing them with the dominant type of even-aged basites of the Vilyui- Markha dyke belt, adjacent to the territory of the object under study, showed the identity of their petrographic, chemical and trace element compositions. High-Ti basites (> 4.5% TiO2 ) are locally found within the Tenkelyakh area are established, which, according to previous studies [12, 13], are usually adjacent to kimberlite pipes and can be used as indicators of search of promising areas for indigenous diamond sources.