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郯庐断裂带是一条纵贯我国东部的巨大构造带,前人对它的性质、展布方式及成生发展做了大量工作,各家至今仍持许多不同见解。笔者通过对该断裂带南段的野外宏观调查和室内显微构造分析,认为它应属新华夏系的构造成份。本文试从郯庐断裂南段构造岩的分析入手,对该断裂带的力学性质问题做出回答,进而重建其形成的地质环境,并对它的活动时期提供佐证。
The Tan-Lu fault zone is a huge tectonic belt that runs through the eastern part of our country. Many people did a great deal of work on the nature, distribution and development of the Tan-Lu fault zone. Based on the field investigation and the microstructure analysis of the southern section of the fault, the author thinks that it should belong to the structural component of the Xinhuaxia line. This paper tries to start with the analysis of the tectonic rocks in the southern part of Tanlu Fault and replies to the mechanical properties of the fault so as to rebuild the geologic environment it has formed and provide evidence for its active period.