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本文所指西南地区包括秦岭、大别山以南,九岭山、诸广山以西,唐古拉山以东广大地区。解放以来,这里进行了大量的区域地质调查和矿产普查勘探工作,前寒武纪的研究也有较大的进展。本文是根据作者在部分地区多年的实地研究和参阅了有关单位的前寒武纪地质资料写成的,主要讨论前寒武纪构造阶段的划分、原地槽的基本特征和类型,探索该区前寒武纪的构造演化,以及前寒武纪铁矿的分布规律和可能的找矿方向。
This article refers to the southwest region, including the Qinling Mountains, south of the Dabie Mountains, Jiuling Mountain, west of Zhu Mountain, the vast area east of Tanggula. Since the liberation, a large number of regional geological surveys and mineral prospecting surveys have been carried out here, and research on Precambrian has made great progress. This article is based on years of fieldwork by the author in the area and reference to the Precambrian geological data of the units concerned. The paper mainly discusses the division of the Precambrian tectonic stage, the basic features and types of the original troughs, Cambrian tectonic evolution, and Precambrian iron ore distribution and possible prospecting direction.