壳幔混合层的物质过程及其动力学意义

以评述壳幔混合层的物质过程为主，对壳幔混合层的概念、研究现状、形成机制及作用过程等作了简要综述。底侵作用、拆沉作用和部分熔融作用是壳幔混合层的主要物质过程。底侵和拆沉构成壳幔物质循环，部分熔融则为其提供物质和条件，这三者相互作用，影响和制约着壳幔物质交换，在大陆地壳变形中起着极其重要的作用。最后分析了壳幔混合层的研究在岩石圈动力学中的意义

Material Process of Crust-Mantle Mixed Layer and Its Implication in Geodynamics

Crust-Mantle mixed layer (CMML for short) is an important transition zone between crust and mantle. In this paper, a general survey of the studying CMML is presented from its material process, which include underplating, delamination and partial melting. Underplating can supply mafic-ultramafic magma which could change the composition and seismic waves of the lithosphere. Delamination can make crust rocks drop into the upper mantle if proper cranny is exist. Crust-mantle recycling will occur with the interaction of these processes. Partial melting is also very important, not only to the formation and evolvement of CMML but also to underplating and delamination. Its study implication in geodynamics is also pointed out in the paper.