Late Mesozoic East Asian Magmatic Province: Structure, Magmatic Signature, Formation Conditions

Abstract

Abstract—The Late Mesozoic volcanic province of East Asia is considered in relation to global geological events. The main structure-forming events and largest magmatic productivity of the province coincided with the peak of widely manifested plume activity in the Early Cretaceous. A geodynamic model of magmatic province formation of is proposed, relating the development of the province to the complex geodynamic setting for the interaction of the convergent boundary with the hot mantle field. The Pacific marginal magmatic belt formed in the front zone of convergence, where accretion of terranes occurred with prevalent supersubduction magma-forming mechanisms. In the western part of the province outside convergence zone an intraplate volcanic areas formed due to the activity of small mantle plumes.