中国石炭—二叠纪放射虫化石带及古生物地理学意义  

CARBONIFEROUS—PERMIAN RADIOLARIAN BIOZONES OF CHINA AND THEIR PALAEOBIOGEOGRAPHIC IMPLICATION

作　　者：王玉净[1] 杨群[1] 

机构地区：[1]中国科学院南京地质古生物研究所现代古生物学与地层学国家重点实验室,南京210008

出　　处：《微体古生物学报》2007年第4期337-345,共9页Acta Micropalaeontologica Sinica

基　　金：中国科学院重点方向项目(KZCX2-SW-129);国家自然科学基金课题(40172004)资助

摘　　要：中国广西钦州地区和云南西部昌宁—孟连地区的层状硅质岩地层中发育丰富的石炭—二叠纪放射虫生物群,据此建立了22个连续的放射虫化石带。从晚石炭世至晚二叠世长兴期,日本西南区出现的Pseudoalbaillella nodosa带至Neoalbaillella optima带共15个放射虫生物带可与中国同期发育的17个放射虫生物带对比,代表泛大洋(Panthalassa)沉积的部分日本地体和代表古特提斯洋(Palaeo-Tethys)沉积的中国部分构造单元,无论在放射虫生物类群组分还是在化石生物带构成方面都非常相似。晚石炭世—二叠纪放射虫生物地层学资料证实,该时期地球上的两个大洋(泛大洋和特提斯洋)没有明显的分化,可能属于同一大洋体系———古特提斯洋。Abundant Carboniferous—Permian radiolarian assemblages occur in pelagic siliceous deposits distributed in Qinzhou, Guangxi, and Changning—Menglian region, western Yunnan, South China. Twenty-two continuous radiolarian biozones are established in the study region. This study suggests that the late Carboniferous—latest Permian radiolarian zones discovered in South China are perfectly correlatable with the coeval radiolarian zones （from Pseudo-albaillella nodosa Zone to Neoalbaillella optima Zone） in southwest Japan, representing the Palaeo-Tethyan deposits and the deposits of the Panthalassa respectifully. Based on the palaeontological correlation, it is found that the radiolarian composition and biozonal structure between the Palaeo-Tethyan and Panthalassa regions are extremely similar, indicating that the late Carboniferous through Permian oceans most likely belonged to a single homogeneous oceanographic system——Palaeo-Tethys ocean.

关 键 词：放射虫 生物地层学 石炭—二叠纪 中国 泛大洋 古特提斯洋 

分 类 号：Q915[天文地球—古生物学与地层学]