南京栖霞山栖霞组含生物灰岩岩石学特征及环境分析

<正> 华南二叠系栖霞组碳酸盐岩生物丰富,造岩造礁生物门类繁多,可达十多个门类,对开展化石岩石学和探索沉积相和生物相的关系等方面的研究,是很有利的。1977年,笔者在南京栖霞山大洼测制栖霞组剖面,参加实验项目分析的有:周仰康(光谱半定量分析),姚婉圭(化学分析),何锦文(X射线衍射分析);化石鉴定有:王克良(有孔虫),穆西

Petrological characteristics and environmental analysis of the biolithite from the Ch-ihsia Formation of Mt. Qixia, Nanjing

This paper deals with the application of fossil petrological method to the identification of the microstrueture of the fossil fragments from the Chihsia Formation, including foramini-feras, red alage, green alage, brachiopods, gastropods, bryozoans, echinoderms, corals, hydro-zoans, sponge spioules, ostracods, trilobites, etc., Based on these different assemblages of fossil fragments, this formation may be further divided into several microfacies zones.During the period of deposition, the Permian Chihsia Formation of South China was a shallow earbonatite platform. In the area, around Mt. Chihsia, Nanjing, the water body was limited, the hydrodynamics became weaker, and no carbonate grains or sparry cements were formed. The storage of oil and gas is poor. However, since the water body was devoid of terrigenous debris and are of relatively low turbidity, such an envoronment was favourable to the growth and reproduction of organisms, thus resulting in the abundance of organic substance, especially the alage gymnocodiums contained in the Stink Limestone Member, which provided an excellent condition for the formation of oil and gas in the strata.