川东地区晚二叠世长兴期生物礁分布特征

Distributional Characteristics of Organic Reef at Changxing Stage of Late Permian in East Sichuan Area

前人研究认为晚二叠世长兴期生物礁主要为环陆棚边缘带发育的陆棚边缘礁;通过对研究区钻井岩心分析,认为生物礁发育环境应为浅水碳酸盐岩台地沉积,生物礁不呈带状分布,不具边缘礁的特点,属于台地内的点礁或斑礁。

It was considered by former study that the organic reef at Changxing stage of late Permian mainly belongs to shelf-edge reef developed around the edge of the shelf. Through analyzing the drilling core from the study area, it is considered that the growing environment of organic reef is deposit of carbonate platform in shallow water, where the organic reef is not in zonal distribution without the property of edge reef, it belongs to point reef or patch reef.