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云南东部震旦系分布广泛,发育良好,是研究震旦系的重要地区之一。 1965年8月,笔者与云南地质局曹仁关同志等一道,在晋宁王家湾,实测了震旦系剖面。1977年8、9月间又对原测剖面做了厘定。在此期间,地质科学院邢裕盛同志到该剖面采集一批微古植物样品并鉴定了其中的微古植物化石;云南地质局二十地质队对重要接触关系及磷矿层做了揭露及编录。1977年12月至1978年3月,云南省地质局震旦系研究队(以下简称研究队)对该剖面进行了系统的地表揭露,重测了剖面,取得许多新成果。通过这些工作,提高了该剖面的研究程度。本文拟就各方面取得的成果和厘定后的层序作一介绍,并就云南东部震旦系的划分和上界,提出粗浅看法。由于笔者水平有限,谬误之处在所难免,敬请读者指正。
Sinian in eastern Yunnan is widely distributed and well developed, and is one of the most important areas for studying the Sinian. August 1965, the author and Comrade Cao Ren Guan, Yunnan Geological Bureau, etc., together, in Wang Jin Wanning, measured the Sinian profile. In August and September 1977, the original profile was also determined. During this period, Comrade Xing Yusheng of the Academy of Geological Sciences collected a series of samples of the microplate from this section and identified the microfossil plants. The geological team of Yunnan Geological Bureau exposed and cataloged the important contact relations and the phosphate rock. From December 1977 to March 1978, the Sinian Research Team of Yunnan Geological Bureau (hereinafter referred to as the Research Team) systematically exposed the surface of the section, re-measured the section and made many new achievements. Through these efforts, the profile of the study increased. This article intends to make a brief introduction on the achievements made in various fields and the sequence after the determination, and gives a superficial view on the division and upper bound of the Sinian system in eastern Yunnan. As the author is limited, the fallacy is inevitable, please correct me.