KMS Nanjing Institute of Geology and Palaeonotology,CAS
Changhsingian conodont succession and the end-Permian mass extinction event at the Daijiagou section in Chongqing, Southwest China | |
Yuan, Dongxun (袁东勋)1,2![]() ![]() ![]() ![]() | |
2015-06-01 | |
发表期刊 | JOURNAL OF ASIAN EARTH SCIENCES
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ISSN | 1367-9120 |
卷号 | 105页码:234-251 |
摘要 | Previous studies suggested rapid evolution of conodonts across the Permian-Triassic boundary (PTB), and the end-Permian mass extinction pattern varies in different sections in South China. Here we document a high-resolution conodont succession from a carbonate facies of the Changhsingian Stage and across the PTB at the Daijiagou section, about 35 km north to Chongqing City, Southwest China. Two genera and twelve species are identified. Seven conodont zones are recognized from the uppermost part of the Lungtan Formation to the lowest Feixianguan Formation. They are the Clarkina liangshanensis, C. wangi, C subcarinata, C. changyingensis, C. yini, C. meishanensis, and Hindeodus parvus zones in ascending order. Based on the high-resolution biostratigraphical framework at Daijiagou, the end-Permian mass extinction was rapid and it began in the base of the Clarkina meishanensis Zone. Associated with the extinction, a negative excursion of delta C-13(carb) started in the middle part of Clarkina yini Zone with a progressive shift of 1.6 parts per thousand to the middle part of the Clarkina meishanensis, followed by a sharp shift of 3.51 parts per thousand from the Clarkina meishanensis Zone to the Hindeodus parvus Zone. Our study also suggests that the Triassic index species Hindeodus parvus co-occurred with Hindeodus changxingensis and Clarkina zhejiangensis and directly overlies the Clarkina meishanensis Zone at the Daijiagou section. All these data from the Daijiagou section and some previous studies of other sections in Sichuan, Guizhou provinces and Chongqing City suggest that the first occurrences of Hindeodus parvus are slightly earlier than the sharp negative excursion of delta C-13(carb) and the FAD at the Meishan GSSP section. We consider that the slight difference of the end-Permian mass extinction, chemostratigraphy and conodont biostratigraphy at Daijiagou and its adjacent areas is most likely subject to different lithofacies, fossil preservation, and the constraint on the stratigraphic resolution rather than a different tempo of the end-Permian mass extinction in a global sense. The whole Changhsingian conodont succession at Daljiagou provides a high-resolution correlation with other equivalent sections in the Palaeotethys. The controversial results of biostratigraphy and chemostratigraphy between the sections investigated in this paper and the Meishan GSSP section also provide some important implications that accurate chronocorrelation requires the evaluation of multiple, varied stratigraphcal signals rather than relying solely on the FAD of the Triassic index species Hindeodus parvus for recognizing the Permian-Triassic boundary (PTB). Growth series of abundant specimens for each species are figured. The taxonomy of some Hindeodus species in the PTB interval is updated. (C) 2015 Elsevier Ltd. All rights reserved. |
关键词 | Conodonts Changhsingian End-permian Mass Extinction Permian-triassic Boundary South China |
DOI | 10.1016/j.jseaes.2015.04.002 |
语种 | 英语 |
关键词[WOS] | Triassic Boundary Interval ; Global Stratotype Section ; Meishan Section ; Brachiopod Faunas ; Hubei Province ; Point Gssp ; Biostratigraphy ; Zhejiang ; Zonation ; Sichuan |
资助项目 | National Natural Science Foundation of China[41290260] ; National Natural Science Foundation of China[41273081] ; National Natural Science Foundation of China[41102056] |
WOS研究方向 | Geology |
WOS类目 | Geosciences, Multidisciplinary |
WOS记录号 | WOS:000355051700015 |
项目资助者 | National Natural Science Foundation of China |
出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
文献类型 | 期刊论文 |
条目标识符 | http://ir.nigpas.ac.cn/handle/332004/11956 |
专题 | 中国科学院南京地质古生物研究所 其他 |
通讯作者 | Shen, Shu-zhong (沈树忠) |
作者单位 | 1.Nanjing Univ, Sch Earth Sci & Engn, Nanjing 210093, Jiangsu, Peoples R China 2.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, Nanjing 210008, Jiangsu, Peoples R China 3.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou 510640, Guangdong, Peoples R China |
第一作者单位 | 中国科学院南京地质古生物研究所 |
通讯作者单位 | 中国科学院南京地质古生物研究所 |
推荐引用方式 GB/T 7714 | Yuan, Dongxun ,Chen, Jun ,Zhang, Yi-chun ,et al. Changhsingian conodont succession and the end-Permian mass extinction event at the Daijiagou section in Chongqing, Southwest China[J]. JOURNAL OF ASIAN EARTH SCIENCES,2015,105:234-251. |
APA | Yuan, Dongxun ,Chen, Jun ,Zhang, Yi-chun ,Zheng, Quan-feng ,&Shen, Shu-zhong .(2015).Changhsingian conodont succession and the end-Permian mass extinction event at the Daijiagou section in Chongqing, Southwest China.JOURNAL OF ASIAN EARTH SCIENCES,105,234-251. |
MLA | Yuan, Dongxun ,et al."Changhsingian conodont succession and the end-Permian mass extinction event at the Daijiagou section in Chongqing, Southwest China".JOURNAL OF ASIAN EARTH SCIENCES 105(2015):234-251. |
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