Latest Wuchiapingian to Earliest Triassic Conodont Zones and δ13Ccarb Isotope Excursions from Deep-Water Sections in Western Hubei Province, South China

论文摘要

Deep-water facies sections have advantages of recording complete information across the Permian-Triassic boundary（PTB）. Here we present a detailed study on the conodont biostratigraphy and carbon isotope profile ranges from the Wuchiapingian-Changhsingian boundary（WCB） to the PTB of two deep-water facies sections at Zhuqiao and Shiligou in the Middle Yangtze region, western Hubei, South China. Fifteen species and three genera are identified. Eight conodont zones are recognized which in ascending order are the Clarkina orientalis, C. wangi, C. subcarinata, C. changxingensis, C. yini, C. meishanensis, Hindeodus parvus and Isarcicella isarcica zones. The onset of deposition of the deep-water siliceous strata of Dalong Formation in western Hubei began in the Late Wuchiapingian and persisted to the Late Changhsingian. Carbon isotope negative excursions occur near both the WCB and PTB in both sections. The WCB δ13 Ccarb negative excursion is in the C. orientalis and C. wangi zones. The PTB δ13 Ccarb negative excursion began in the C. yini Zone and extended to the I. isarcica Zone. The absence of several Changhsingian zones may indicate the difficulty of extracting conodonts from siliceous strata or the presence of an intra-Changhsingian hiatus.

论文目录

• 0 INTRODUCTION
• 1 GEOLOGICAL SETTING
• 2 MATERIALS AND METHODS
• 3 CONODONT BIOSTRATIGRAPHY
•   3.1 Clarkina orientalis Zone
•   3.2 Clarkina wangi Zone
•   3.3 Clarkina subcarinata Zone
•   3.4 Clarkina changxingensis Zone
•   3.5 Clarkina yini Zone
•   3.6 Clarkina meishanensis Zone
•   3.7 Hindeodus parvus Zone
•   3.8 Isarcicella isarcica Zone
• 4 CARBON ISOTOPE STRATIGRAPHY
• 5 DISCUSSION
•   5.1 Definition of the Wuchiapingian-Changhsingian Boundary
•   5.2 Definition of the Permian-Triassic Boundary
•   5.3 Temporal and Spatial Distribution of Dalong For-mation in Western Hubei
• 6 CONCLUSIONS

文章来源

类型: 期刊论文

作者: Bo Yang,Hanxiao Li,Paul B.Wignall,Haishui Jiang,Zhijun Niu,Qian Ye,Qiong Wu,Xulong Lai

来源: Journal of Earth Science 2019年05期

年度: 2019

分类: 基础科学

专业: 生物学,地质学

单位: School of Earth Sciences, China University of Geosciences,Wuhan Center of Geological Survey,School of Earth & Environment, University of Leeds,State Laboratory of Geobiology and Environmental Geology, China University of Geosciences,Non-ferrous Metals Geological Exploration Bureau of Zhejiang Province,State Laboratory of Paleontology and Stratigraphy, Nanjing Institute of Geology and Paleontology

基金: supported by the Natural Science Foundation of China(Nos.41572002,41830320,41272044,41472087,4183000426,41802016)

分类号: Q911

页码: 1059-1074

总页数: 16

文件大小: 23358K

下载量: 11