CENOMANIAN VOLCANISM OF THE EASTERN SIKHOTE-ALIN VOLCANIC BELT: GEOCHEMICAL FEATURES

Abstract

A geochemical study of the Cenomanian andesitic and basaltic volcanic rocks in the lower part of the Eastern Sikhote-Alin volcanic belt was performed. Petrologic and geochemical features of the rocks correspond to products of calc-alkaline magmas of the subduction-related continental-margin belts. The Cenomanian volcanics differ in some geochemical features from the Aptian-Albian Sikhote-Alin island-arc rocks and the Albian-Cenomanian rocks characterizing the geodynamic regime of a Californian-type transform continental margin.