Новые данные о составе пермских терригенных отложений Омолонского массива (Северо-Восток России): значение для палеогеографии и геодинамических реконструкций

The article discusses the results of studying the material composition of Permian terrigenous deposits in the Dzhigdali, Gizhiga, and Khivach formations in the southeastern part of the Omolon massif. The obtained data interpretation is based on the petrographic research and widely used petrochemical and discriminant paleogeodynamic diagrams. The lithochemical study showed that the deposits had accumulated under conditions of a moderately warm climate with some cooling episodes in the active continental margin settings. Clastic material entered the sedimentary basin from several provenance areas: the Permian Okhotsk-Taigonos volcanic arc, the Precambrian basement of the Omolon massif, and volcanic rock fields of the Kedon series.