Research Progress on Cenozoic Volcano Genesis and Fluid Action in Northeast China

Frontiers in Earth Science

Yufeng Deng¹  Min Li¹  Xueshan Wu¹  Song Huang² 

[1] College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing, China;Innovation Academy for Earth Science, Chinese Academy of Sciences, Beijing, China;Key Laboratory of Petroleum Resources Research, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China;

关键词: volcano genesis;    fluid;    stagnant slab;    seismic velocity;    electrical conductivity;   

DOI  :  10.3389/feart.2021.808914

来源: DOAJ

【 摘 要 】

The tectonic evolution of northeast China is closely related to the subduction of the Pacific plate. The dehydration of the slab subduction process produces metasomatic agents that have important effects on the physical and chemical properties of the mantle wedge, including the decrease of seismic wave velocity and the increase of Poisson’s ratio and electrical conductivity. In order to investigate the tectonic evolution and fluid action of northeast China, this paper compares the previous seismic and electromagnetic imaging results of northeast China and explores the relationship between the genesis of Cenozoic volcanoes and fluid action in northeast China through rheological analysis. The results show that the western Pacific plate subducted into the mantle transition zone beneath northeast China, and sustained dehydration occurred. The upward migration of these released water caused partial melting at the base of the upper mantle. Some of the upwelling streams pierced the weak tectonic boundary under the buoyancy effect, which finally formed the large-scale Cenozoic volcanic events in northeast China.

【 授权许可】

Unknown