黔南、湘中地区早二叠世四射珊瑚生态环境分异研究

ECOLOGICAL-ENVIRONMENT DIFFERENTIATION OFTHE EARLY PERMIAN RUGOSE CORALS INSOUTHERN GUIZHOUADN CERTRAL HUNAN

本文通过对黔南、湘中下二叠统(包括链带:Sphoeruschwagerina 带,Panirina m带和misllr-na 带)各个岩相内四射珊瑚及其共生分子的数量统计,探讨了这两个地区本期内四射珊瑚的生态环境分异,并区分出了几个主要岩相中四射珊瑚动物群的典型面貌和特征性分子,为今后岩相古地理研究提供了重要证据。

The ecological- environment differentiation of the Early Permian rugose corals in Southern Guizhou and Central Hunan is very obvious. According to quantitative analysis of the rugose corals of different facies in some major stages of the Early Permian, the ecological-environment differentiation of the corals is discussed as the following: (1)In turbulent shallow marine on platform margin, massive compound rugose corals domi-nanted. (2) In tranquil shallow marine on platform margin, solitary rugose corals of trizone type, aphroid and thamnasterioid compound corals domminanted, but massive compound corals de-cresed. In this environment, the diversity of rugose corals is the largest. Nes elements of these corals usually occured in this environment. (3)In basin Sedimentary area, only non-dissepiment rugose corals occured. These stuides will provide some important paleontological evidences for the sedimentology and paleogeography of future.