The Discovery of Early Paleozoic Nautiloid Fossils in Zhongba Area of Tibet and Its Geological Significances

详细信息   

• 责任者：Luo Kai (College of Geoscience and Resources ; Research Center of Qinghai-Tibetan Plateau Geology ; China University of Geoscience ; Beijing 100083 ; China) ; Li Xianghui
• 刊名：Geological Bulletin of China
• 出版年：2012
• 卷期：31(4)
• 关键词：早古生代 ; Lower Palaeozoic ; 鹦鹉螺 ; Nautilus ; 西藏 ; Tibet
• 页码：p.528-531
• 图表：2 illus., 10 refs.
• 分类号：1200
• issnNo：ISSN1671-2552
• isbnNo：CN11-4648/P

摘要

Fossils of Endociratidae of nautilaoid (cephalopods) were recently discovered in Zhongba area, southwestern Tibet. The fossils occur in calcareous schist and schistositized crystalline limestone dated as the Middle and Upper Permian Quga Formation and tectonically classified as the Zhongba microterrane of the Yarlung Zangbo suture. The discovery of nautiloid fossils provides evidence for diversified stratigraphic classification and disorganization of the Quga Formation within the microterrane. It is therefore inferred that there probably exist the Devonian and Carboniferous strata in the microterrane, the Lower Paleozoic strata might be correlatible among the Lhasa terrane, Tethys Himalaya and Zhongba microterrane, and the Zhongba microterrane might have had an affinity to the North China Plate or/and Yangtze Plate.