中国及邻区重力特征与块体构造单元初划

Gravity characteristics and preliminary division of tectonic units in China and adjacent areas

以重力资料为基础,结合其分析结果和区域地质构造现象,以及前人研究成果,在总结中国海陆地质地球物理系列图编制项目组和前人对中国岩石圈三维结构宏观特征研究成果基础上,将块体构造理论应用于解释中国海陆宏观大地构造格架,并将其划分为3个构造域和20多个块体。对3个构造域及块体构造单元特征进行了分析,指出印支运动使中国岩石圈应力场发生了根本性变化,并为现今宏观大地构造格局的形成创造了条件。

Based on an analysis of gravity data and regional geological structure in combination with the achievements made by previous researchers,the authors summarized the 3D lithospheric tectonic macroscopic characteristics of China＇s land and seas detected by the geological-geophysical map compilation group and other researchers,and applied the Block Tectonics Theory to interpret the tectonic macroscopic framework of China＇s land and seas.On such a basis,the authors divided the study regions into three tectonic domains or more than 20 blocks,analyzed the characteristics of the three tectonic domains and block units,and indicated that Indosinian movement resulted in the fundamental change of the lithospheric stress field and created the conditions for the formation of present tectonic macroscopic framework.