THE SEA OF OKHOTSK GEOTRAVERSE: TECTONOMAGMATIC EVOLUTION OF CENOZOIC EXTENSION STRUCTURES AND IMPLICATION FOR THEIR DEEP STRUCTURE

Abstract

Issues of the origin of marginal seas and genesis of their igneous rocks remain controversial because of the insufficient amount of documentary information (small number of drilled holes, rare network of seismic profiles, and so on). Therefore, data on seismic profiles carried out within the framework of the Geotraverse International Project are of great significance. The geotraverse extends from the margin of Asia (Sikhote Alin) to the northwestern periphery of the Pacific plate and includes large Cenozoic extension structures, such as the Tatar continental rift and the South Kuril marginal basin.