浅析中国地区体波走时层析成像研究进展

BRIEF ANALYSIS ON STUDY DEVELOPMENT FOR THE TRAVAL TIME TOMOGRAPHY OF BODY WAVE IN CHINA REGION

摘要:

将中国地区划分为东西两部分详细地讨论了中国地区体波走时层析成像研究现状.总结了中国地区三维速度结构的一些特征:地震波速度存在明显的横向不均匀性,甚至在1 100 km左右深处还保留了这一特点,浅部层面地震波速度图像与地表已知的地质特征有较好的相关性,速度图像与地震活动性有一定的对应关系,岩石层厚度及地壳厚度的起伏状况等;最后分析了目前中国地区体波走时层析成像研究工作的特点并提出了一种可能的发展趋势.

Abstract:

The author has discussed the present situation of travel time tomography of body wave in China region in details by dividing the region into the east and west parts.Some features of the three-dimension velocity structure in China have been summarized:the velocity image displays clearly the lateral heterogeneity in the crust and upper mantle,which persists down to 1 100 km deep;there is a correlation between the velocity image of the shallow part and the known geological features;there is also a correlation between the velocity image and seismicity;the lithosphere thickness and the crust thickness change,and so on.Finally,the features of tomography in the present researches in China and it's possible development tendencies have been analy sized.