湘南上二叠统长兴组生物礁基本特征

湘南生物礁发育于上二叠统长兴组。该礁体的岩石组合类型有:骨架岩、障积岩、粘结岩等。组成礁体的生物极为丰富,类型繁多。造架生物有:串管海绵、纤维海绵、Tabulozoan、水螅类、四射珊瑚等。粘结生物有:Archaeolithoporella、Tubiphytes、Tabulozoan及蓝绿藻。附礁生物有:腕足类、有孔虫等。礁体发育大致可以分为四个阶段:萌芽期、发育期、繁盛期和衰亡期。从礁体的发育关系来看,具有海侵过程中向岸推移的趋势。

THE REEFS OF CHANGXING FORMATION IN THE SOUTHERN HUNAN PROVINCE

This paper mainly deals with the rock association, the palaeontological association, diagenesis and the development of the Changxing Formation reefs in southern Hunan. Bafflestones, framestones as well as bindstones are described. According to the function of reef-building, the organisms are classified to frame-builder, bind organisms and elastics-builder, in witch main frame-builders are Sphictozoa, Inozoa, Tabulozoa and Hydrozoan, the bind organisms are Archaeolithlporella, Tubiphytes, Tabulozoa and blue-green algae. Four developing stages of the reefs have be distinguished.