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HISTORICAL-TECTONIC SETTING OF BASALTOID MAGMATISM MANIFESTATION ON THE CONTINENTS

V. S. Staroseltsev

Siberian Research Institute of Geology, Geophysics and Mineral Resources, Novosibirsk, Russia

The article presents a systematization of basaltoid magmatism manifestations on the continents. The identification of three fundamentally different types of historical-tectonic settings of its manifestation, which have different effects on oil and gas prospects of such territories, is justified. The authors justify the advantage in this respect of the regions in which the basaltoid magmatism manifestation is preceded by a long-term compensated large-amplitude downwarping by sediments of different lithologic composition. In regard to oil and gas prospects, regions in which basaltoid magmatism is preceded by rifting processes are also of interest. An actual absence of significant oil and gas manifestations is typical of regions with intensive manifestation of the preceding intensive folding. The structure of the basaltoid complexes themselves is characterized by uniform regularities including the presence of key basalt covers, which greatly facilitate their mapping.

Keywords: historical-tectonic settings of basalts, scales of preceding downwarping, key basalt covers.

DOI 10.20403/2078-0575-2018-4-3-7