中国东南地区地壳演化、分区及地震成因特点

本文利用物质分异的理论，阐明了不同地壳类型的相互转化，进而讨论了中国东南地区地壳演化基本特征。在此基础上对该区地壳进行了分区，并分析了各个分区构造特征与地震的关系。结果表明，该区内陆深大断裂带下部地壳和上地慢物质分异微弱，显示出断裂活动强度低，地震活动平静；东部地区物质分异强烈，靠近菲律宾板块消减带，断裂活动和地震活动显著增强。

CRUSTAL EVOLUTION, DIVISION AND SEISMOGENETIC CHARACTERISTICS IN SOUTHEAST CHINA

In the light of the theory of material differentiation,this paper describes the transformation of crustal types from one into the other and discusses the fundamental characteristics of crustal evolution in southeast China,On this basis,southeast China is divided into different crustal divisions,and the relations between tectonic feature and seismology are discussed.The results show that material differentiation has been taking place only weakly in major deep fracture zong of southeast China inland,resulting in a low intensity of fracture activity and in the qui-escency in seismicity;whereas in the eastern part being close to the subduction zone of Philippine Plate,material differentiation is strong,fracture activity and seismicity are significantly strengthening.