中国深部构造研究的进展

本文扼要地总结了我国对深部构造研究的进展情况。曾经在几个不同地区进行过地震测深的工作,有些地区发现地壳中存在高速或是低速的夹层。曾经利用数字计算求得不同地区的地震面波频散,并用阻尼最小二乘方法反演地壳的参数。根据地震面波频散的特征,可以研究我国大地构造单元的区分。

A REVIEW OF CRUSTAL AND UPPER MANTLE RESEARCHES IN CHINA

Because China has been considered to be a special tectonic unit in the global tectonic theory,its crustal and upper mantle structures are interesting to many geophysicists and geologists. This article reviews briefly the research works of studying the physical properties and structures of the crust and upper mantle in China that have been carried out in the past twenty yearsThe seismic techniques were considered as the main method for probing the deep structures. The subcritical seismic reflected waves were recorded and analysed in some regions. It was reported that the high-velocity and low-velocity layers were identified in several regions.Compared with the great territory of China,both the field works and theoretical researches are far short of the need for practical purposes. It is emphasized that a national project for probing the crust and upper mantle of China is greatly in need,and should be carried out as soon as possible.