大陆下地壳活动及岩石学特征研究进展

Research Progress of Activity of Continental Lower Crust and Petrologic Characteristics

大陆下地壳是地球深部地壳生长和变形、壳—幔物质与能量交换及壳内物质分异的重要场所。对大陆下地壳结构、成分与性质的认识,是更好地探索地壳形成、演化等地球动力学过程的前提。总结前人根据地震反射、区域麻粒岩和麻粒岩包体等的研究,对大陆下地壳物质组成进行归纳;总结大陆下地壳岩石的流变性质,在此基础上对大陆下地壳流动的几种模式进行对比。

Lower continental crust is an important place where the deep-seated earth＇s crust growth and deformation, the crust-mantle matter and energy exchanging and shell material differentiation occur. A deeper probe into the structure, component and properties of the crust provides premise for the better exploration of crust formation, evolution and geody- namic processes. Based on the former researches on seismic reflection, regional granulite and granulite xenoliths, this paper concludes crustal components and rheological property of crustal rocks, thus providing a summary of and comparison among several models of crustal flow.