摘要
西藏东部丁青蛇绿岩套层序齐全 ,深海沉积硅质岩中发现了晚三叠世放射虫 ,主要有 Capnuchosphaera the-loides,C.triassica,Xenorum flexum,Pseudostylosphaera gracilis,Veghicyclia austriaca,Perispongidiumtethyus,Spongostylus toltilis,S.carnicus,Annulotriassocampe sulovensis,Canoptum triassicum,Poulpus piabyx,X iphotheca karpenissionensis,Laxtorum(?) carnicum,Multimonilis pulcher,M.japonicus,Palaeosaturnalistrias-sicus,Pseudoheliodiscuslatus等 ,其时代为 Carnian期 ,表明丁青带三叠纪发育较成熟洋盆 ,为新特提斯演化提供了证据。
The sequences of the Dingqing Ophiolite in East Tibet are complete. Late Triassic radiolarians were discovered from the siliceous rocks of abyssal sediments, consisting mainly of Capnuchosphaera theloides, C. triassica, Palaeosaturnalis triassicus, Pseudoheliodiscus latus, Xenorum flexum, Pseudostylosphaera gracilis, Veghicyclia austriaca, Perispongidium tethyus, Spongostylus tortilis, S. carnicus, Annulotriassocampe sulovensis, Canoptum triassicum, Poulpus piabyx, Xiphotheca karpenissionensis, Laxtorum(?) carnicum which are of Carnian age. Discovery of these radiolarians indicates that a comparatively mature ocean basin was developed during Triassic in the Dingqing belt and that the evidence was provided for the evolution of the Neo Tethys.
出处
《微体古生物学报》
CSCD
北大核心
2002年第4期417-420,共4页
Acta Micropalaeontologica Sinica
基金
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
