Origin of sanukite from Yixian Formation in western Liaoning province and its tectonic settings.
辽西义县组玻基方辉安山岩成因及其构造背景

A suite of high-Mg sunukites occurred in the uppermost of Early Cretaceous Yixian Formation in western Liaoning Province,China,which show a series of disequilibrium phenomena in textures and their constituent minerals.Major and trace elemental compositions of the orthopyroxenes and glass (hyaline) in the sunukites reveal existence of mixing feature between magma of a crustal origin and that of a mantle derivation.This paper interpreted the existence of orthopyroxenes and the formation of sunukites in a point view of magma mixing between melt from the crust and that from the depleted mantle.According to the fact that rapid eruption of sunukitic magma followed by basaltic magma of depleted mantle origin in the studied area,we believed that the occurrence of these sunukites was a sigh of magma source sift from the enriched lithospheric mantle to the depleted asthenosphere in eastern China in the end of Early Cretaceous.