江苏省沙洲地区长兴组之管见

THE OPINION ON THE CHANGXING FORMATION OF THE SHAZHOU REGION IN JIANGSU PROVINCE

江苏省沙洲地区二叠系上统长兴组均为第四系沉积层所覆盖。在沙1井中发现了丰富的化石。本文利用辛普森指数与牙形石相似性系数把本区的二叠系长兴组地层与浙江省长兴县煤山剖面的长兴组作一对比研究,认为本区的生物相为正常浅海相,根据岩石学性质,本区的岩相为开阔碳酸盐岩台地相。

The Changxing Formation of the Upper Permian in the Shazhou Region is covered by Quaternary sediments. A plenty of fossils have been discovered in the Sha No.l well. In this paper, the Changxing Formation of this region has been correlated with that of the Meishan Section in the Changxing County, Zheiang Province by using the Simpson indices and the similarity of coefficients of conodonts. Therefore, it is suggested that the biofacies of this region should be marine shallow water and the lith-ofacies belongs to a wide carbonate platform according to the lithological characters.