四川江油渔洞子二叠系-三叠系之交两种不同生物沉积之间的生态系突变  

THE SHARP CHANGE BETWEEN THE ECOSYSTEMS OF TWO ORGANIC DEPOSITS ACROSS THE PERMIAN-TRIASSIC BOUNDARY IN THE YUDONGZI SECTION,JIANGYOU,SICHUAN,SOUTH CHINA

作　　者：周志澄[1] 罗辉[1] Willems H 许波[1] 王志浩[1] 蔡华伟[1] 陈金华[1] 陈迪舒[1] 王学恒[1] 刘实佳 

机构地区：[1]中国科学院南京地质古生物研究所,南京210008 [2]Fachbereich Geowissenschaften,Universitat

出　　处：《古生物学报》2016年第1期70-86,共17页Acta Palaeontologica Sinica

基　　金：中国科学院战略性先导科技专项(B类)(XDB03010102);国家自然科学基金青年基金(41402016;41072008);中国科学院"外国专家研究员"计划项目(项目编号:2009Z2-7);德国研究委员会课题(Wi725/26)联合资助

摘　　要：四川江油渔洞子剖面上二叠统长兴组顶部出现的群体珊瑚Waagenophyllum sp.是我国所发现的最晚的古生代群体四射珊瑚之一,下三叠统飞仙关组底部微生物岩直接覆盖在它上面,二叠系-三叠系界线成为这两种不同的生物沉积的分界线,它们各自具有一个独特而复杂的生态系统,二者之间为突变关系。在珊瑚层生态系统中的群体四射珊瑚及重要成员真核藻类如裸海松藻、假蠕孔藻等在微生物岩生态系统中完全消失,后者以底栖微生物群落为主,共生生物组合面貌与珊瑚层中的生物组合面貌截然不同,微生物岩生态系的生物个体小型化也是主要变化之一。The latest Paleozoic colonial coral Waagenophylium sp. occurs near the top of the Upper Permian Changxing Formation in the Yudongzi Section of Jiangyou, Sichuan. It is directly covered by the Early Triassic microbialite near the bottom of the Feixianguan Formation. The boundary between the Permian and Triassic is also the boundary between the two organic deposits that respectively has specific and complex ecosystems. A sharp change takes place from the coral stratum ecosystem to the microbialite ecosystem. Colonial coral in the former is taken over by benthic microbial assemblage in the latter. Eukaryotic algae such as Gymnocodium, Pseudovermiporella etc. totally disappear in the microbialite ecosystem. The size of biota in the microbialite ecosystem is much smaller than that in the coral stratum ecosystem.

关 键 词：珊瑚层 微生物岩 生态系 长兴组 飞仙关组 二叠系-三叠系 渔洞子剖面 四川江油 

分 类 号：Q911[天文地球—古生物学与地层学]