气候变化领域集成服务门户(CCPortal): Microfacies and multi-isotope records of Anisian sequences from the Upper Yangtze Block: possible responses to tectonics and climate-driven relative sea-level change

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DOI	10.1007/s00531-020-01817-9
	Microfacies and multi-isotope records of Anisian sequences from the Upper Yangtze Block: possible responses to tectonics and climate-driven relative sea-level change
	Zhong Y.; Wang L.; Xu Y.; Zhang Y.; Liu C.
发表日期	2020
ISSN	14373254
起始页码	489
结束页码	509
卷号	109 期号:2
英文摘要	The Middle Triassic epoch is the key to understanding the environment changes after the Permian–Triassic mass extinction. The Anisian Badong Formation is a carbonate and siliciclastic succession deposited on the Yangtze Platform, Upper Yangtze Block. In this paper, we use facies analysis combined with sequence stratigraphy of the Badong Formation in the Nashuixi section, Yangtze Block, to discuss the Anisian relative sea-level changes. Microfacies analyses were used to define ten microfacies in four depositional facies zones (tidal flat, restricted platform, restricted to open platform, and open platform) indicating an epeiric platform depositional environment. The lowstand, transgressive, and highstand systems tracts and two sequences were identified. Sequence stratigraphy interpretations indicate that relative sea-level at Nashuixi experienced two rises in the Middle Anisian, which is correlated with those in the Yangtze Block, confirming that sea-level changes during the Anisian were of eustatic origin. However, a distinct regression at Nashuixi occurred in the late Bithynian to IIIyrian while the global sea-level rose, which is likely to be caused by interference from regional tectonics during IIIyrian. The carbon and oxygen isotopic shifts in the Nashuixi section exhibit two negative-values stage in the time near end of Aegean and early Pelsonian, which is well correlated with the global typical sections, indicating two middle Anisian warming events. Our study indicated that the relative sea-level at Nashuixi was controlled by global sea-level change and regional tectonics (Indosinian Orogeny), and the C and O isotopes records respond to global climate change. © 2020, Geologische Vereinigung e.V. (GV).
英文关键词	Anisian; Badong formation; Carbon and oxygen isotopes; Microfacies; Sea-level change; Yangtze platform
语种	英语
scopus关键词	Anisian; carbon isotope; depositional environment; depositional sequence; microfacies; oxygen isotope; sea level change; sequence stratigraphy; tectonic evolution; China; Yangtze Platform; Bithynia
来源期刊	International Journal of Earth Sciences
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/147717
作者单位	MNR Key Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing, 100037, China; Center for Excellence in Tibetan Plateau Earth Sciences, Key Laboratory of Continental Collision and Plateau Uplift, Institute of Tibetan Plateau Research, Beijing, 100101, China; School of Earth Sciences and Resources, China University of Geosciences, Beijing, 100083, China; Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining, 810008, China
推荐引用方式 GB/T 7714	Zhong Y.,Wang L.,Xu Y.,et al. Microfacies and multi-isotope records of Anisian sequences from the Upper Yangtze Block: possible responses to tectonics and climate-driven relative sea-level change[J],2020,109(2).
APA	Zhong Y.,Wang L.,Xu Y.,Zhang Y.,&Liu C..(2020).Microfacies and multi-isotope records of Anisian sequences from the Upper Yangtze Block: possible responses to tectonics and climate-driven relative sea-level change.International Journal of Earth Sciences,109(2).
MLA	Zhong Y.,et al."Microfacies and multi-isotope records of Anisian sequences from the Upper Yangtze Block: possible responses to tectonics and climate-driven relative sea-level change".International Journal of Earth Sciences 109.2(2020).