Mantle plume,large igneous province and continental breakup——Additionally discussing the Cenozoic and Mesozoic mantle plume problems in East China

AbstractBased on the former workers’study results such as numerical simulation of fluid mechanics,seismic tomographyof the whole earth and igneous rocks,the basic characteristics of mantle plumes are summarized in detail,namelythe mantle plume,from the D"layer near the core-mantle boundary(CMB)of 2900 km deep,is characterized bythe shape of large head and thin narrow conduit,by the physical property of high temperature and low viscosity.The LIP(large igneous province)is the best exhibition when the mantle plume ascends to the surface.Accordingto the basic characteristics of the mantle plumes and the LIP,as well as the temporal-spatial relationships betweenthe mantle plume and continental breakup,the detailed research on petrology,geochemistry,temporal-spatialdistribution,tectonic background of the Cenozoic-Mesozoic igneous rocks and gravity anomaly distribution in EastChina has been done.As a result,the Mesozoic igneous rocks in Southeast China should not be regarded as anexample of typical LIP related