西藏丁青蛇绿岩带中一个晚三叠世放射虫动物群  

A LATE TRIASSIC RADIOLARIAN FAUNA IN THE DINGQING OPHIOLITE BELT, XIZANG (TIBET)

作　　者：王玉净[1] 王建平 裴放 

机构地区：[1]中国科学院南京地质古生物研究所,南京210008 [2]河南地质调查研究院,郑州450007

出　　处：《微体古生物学报》2002年第4期323-336,共14页Acta Micropalaeontologica Sinica

基　　金：国家自然科学基金 ( N o.4 0 172 0 0 4 );中国科学院南京地质古生物研究所现代地层和古生物学国家重点实验室的资助

摘　　要：西藏丁青地区晚三叠世 Carnian期放射虫动物群共描述 19属 3 5种 (7个未定种 ) ,归于 16科 (亚科 )中。以Capnuchosphaera,Palaeosaturnalis,Perispongidium,Spongostylus,Annulotriassocampe,Poulpus,Xenorum,Veghicyclia,Tetraporobrachia,Canoptum,Xiphotheca等属为主的这个动物群被命名为 Capnuchosphaera triassica组合带。由于 Capnuchosphaera属在全世界广泛分布 ,无论在特提斯生物大区还是环太平洋生物大区 ,以这个属为主的放射虫动物群已成为国际间 Carnian期至The Late Triassic (Carnian) radiolarian faunas found in Dingqing area, Tibet comprise 35 species (including 7 unidentified species), belonging to 19 genera, which are grouped in 16 family (subfamily). The above mentioned radiolarians are dominated by the genera Capnuchosphaera, Palaeosaturnalis, Perispongidium, Spongostylus, Annulotriassocampe, Poulpus, Xenorum, Veghicyclia, Tetraporobrachia, Canoptum, Xiphotheca and named the Capnuchosphaera triassica assemblage zone. Because the genus Capnuchosphaera is widely distributed in the world, the Capnuchosphaera dominated radiolarian fauna is considered as important base for correlation in the international Carnian to Early-Middle Norian radiolarian biostratigraphic sequences.

关 键 词：卡宁期 西藏 丁青 蛇绿岩带 晚三叠世 放射虫动物群 

分 类 号：Q915.811[天文地球—古生物学与地层学]