Depth distribution of Moho and tectonic framework in eastern Asian continent and its adjacent ocean areas  

作　　者：滕吉文 曾融生 闫雅芬 张慧 

机构地区：[1]InstituteofGeologyandGeophysics,ChineseAcademyofSciences [2]InstituteofGeophysics,ChineseSeismologicalBureau

出　　处：《Science China Earth Sciences》2003年第5期428-446,共19页中国科学（地球科学英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant No. 40074020) and the National Basic Science Research Project (Grant No. 95-S-05).

摘　　要：With the results of interpretation of seismic sounding profiles acquired in the past 30 years in the continent of China and its adjacent countries and ocean regions, such as Russia, Ka-zakhstan, Japan, India, Pakistan, Philippine ocean basin, Pacific and Indian Ocean, we compiled a 2D Moho distribution map for the continent and its adjacent areas of eastern Asia. From the fea-tures of depth distribution and undulation of Moho, it is suggested that the eastern Asian region can be divided into 18 gradient belts with different sizes, 18 crustal blocks, 20 sediment basins and depression zones. The depth of Moho varies smoothly in each block, while the boundary (separat-ing different blocks) delineates the abrupt variation of Moho depth. Then, some subjects,such as oregen and sediment basin, fault system and rift, plate boundary, ocean-continent coupling and tectonic framework, are discussed based on the distribution gradient belts and block partition fea-tures of Moho depth in the eastern Asia and its adjacent regions.With the results of interpretation of seismic sounding profiles acquired inthe past 30 years in the continent of China and its adjacent countries and ocean regions, such asRussia, Kazakhstan, Japan, India, Pakistan, Philippine ocean basin, Pacific and Indian Ocean, wecompiled a 2D Moho distribution map for the continent and its adjacent areas of eastern Asia. Fromthe features of depth distribution and undulation of Moho, it is suggested that the eastern Asianregion can be divided into 18 gradient belts with different sizes, 18 crustal blocks, 20 sedimentbasins and depression zones. The depth of Moho varies smoothly in each block, while the boundary(separating different blocks) delineates the abrupt variation of Moho depth. Then, some subjects,such as oregen and sediment basin, fault system and rift, plate boundary, ocean-continent couplingand tectonic framework, are discussed based on the distribution gradient belts and block partitionfeatures of Moho depth in the eastern Asia and its adjacent regions.

关 键 词：Moho  block partition  sediment basin  boundary field effect  EASTERN ASIAN continent. 

分 类 号：P736[天文地球—海洋地质]