论构造筛分

ON THE METHOD OF TECTONIC SIEVING

该文系统论述复合构造的筛分方法和构造筛分的定义、内涵、基本原理、原则、定律和方法步骤 ,并结合我国区域地质实际和前人研究成果提出若干例证。该文是“论构造复合”的续篇 ,对我国及东亚 -西太平洋复合构造域的复合构造体系的筛分作了若干说明。最后对星球级规模的全球复合构造体系的构造筛分也提出了一些设想。

The method of tectonic sieving was developed by J.S. Lee(LI Si guang) in 1942.It is to sort out tectonic structures of different phases from a complex of tectonic features of all phases,including formational and deformational ones. The first and foremost step is to decide the time sequence of each phase of the structures.This paper systemetically gives the traditional geological methods and other lately developed methods(e.g. isotopic dating method,paleomagnetism method,remote sensing geology method,geochemical and geophycal methods,as well as the method of regional correlation) in determining the time sequence of the deformations. In this paper the principles,methods and steps to discriminate the different phases of orsuperlarge compound deformations (e.g.compound orogenic belts,compound tectonic systems,compound blocks,compound tectonic domains,and the global compound tectonics) are also outlined.