«Proceedings of Gubkin University»

Lithological and stratigraphic characteristics of the Mesozoic autochthonous-allochthonous section of northeastern Sakhalin

UDC: 551.736
DOI: 10.33285/2073-9028-2023-1(310)-75-93

Authors:

¹ Gubkin Russian State University of Oil and Gas (National Research University), Moscow, Russian Federation

Keywords: stratigraphy, lithology, ophiolites, Cretaceous, Mesozoic, Sakhalin, overlap fault, allochthon, suite, well

Annotation:

The focus of the research is the northeastern, eastern part of the Sakhalin region and the adjacent shelf, within which the North Sakhalin and Border sedimentary basins are located. Common in this area are the Mesozoic age rocks, lying in the form of outcrops or uncovered according to well drilling data. The Mesozoic complex here is represented by an autochthonous sedimentary-volcanogenic complex and an ophiolitic allochthon – a paragenetic association of mainly igneous rocks, which is a complete section of the oceanic type crust in an undisturbed state. The existing stratigraphic schemes of the Mesozoi of Eastern Sakhalin mainly reflect the relationship of the divisions of the autochthonous complex. This article describes the stratigraphy from the point of view of the allochthonous-autochthonous structure and, in addition to the lithological-age characteristics, shows the relationship of these complexes. The research and generalization of the materials of various authors is carried out, the results of exploratory and parametric drilling are involved, the material is updated and a consolidated stratigraphic scheme of the Cretaceous interval is created from the position of the cover-thrust structure.

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