气候变化领域集成服务门户(CCPortal): Revisiting the Permian seawater 87Sr/86Sr record: New perspectives from brachiopod proxy data and stochastic oceanic box models

CCPortal

DOI	10.1016/j.earscirev.2021.103679
	Revisiting the Permian seawater 87Sr/86Sr record: New perspectives from brachiopod proxy data and stochastic oceanic box models
	Wang W.-Q.; Katchinoff J.A.R.; Garbelli C.; Immenhauser A.; Zheng Q.-F.; Zhang Y.-C.; Yuan D.-X.; Shi Y.-K.; Wang J.; Planavsky N.; Shen S.-Z.
发表日期	2021
ISSN	00128252
卷号	218
英文摘要	The Permian Period is punctuated by Earth system changes unlike any other in geological history. The start of the Permian witnessed the termination of the Late Paleozoic Ice Age, followed by the climatic transition from icehouse to greenhouse conditions. The Guadalupian-Lopingian (Middle-Late Permian) was characterized by two biocrises associated to volcanisms: (i) the end-Guadalupian crisis and (ii) the end-Permian mass extinction. Seawater Sr isotope (87Sr/86Sr) records can shed light on the evolution of the Permian Earth system. The Permian 87Sr/86Sr record suffers from a number of issues including low resolution and potential diagenetic alteration. In this paper, we summarize the existing Permian 87Sr/86Sr records and focus on the current challenges. We also present a new, high-resolution Permian 87Sr/86Sr curve derived from pristine brachiopod shells based on data resulting from careful diagenetic screening. Our new record shows that the 87Sr/86Sr of seawater decreased continuously from the earliest Permian to the middle Capitanian (late Guadalupian), with the lowest ratio of 0.706832 registered in the Colania douvillei-Kahlerina pachiytheca Zone. Subsequently, 87Sr/86Sr ratios increased from the late Capitanian to the latest Permian and reached a ratio of 0.707167 just 0.8 m below the first occurrence of the Hindeodus parvus. We employed a stochastic oceanic box model to explore the potential drivers of the Permian seawater Sr isotope record. Our results support that changes in the hydrothermal input, rather than changes in continental weathering intensity, are the most likely controlling factor for the observed variations in Permian seawater 87Sr/86Sr. Therefore, we suggest that the marine hydrothermal system (and hence ocean basin dynamics and deep-sea temperatures) may have been the driver of the pronounced decreasing 87Sr/86Sr trend across the Permian. © 2021 Elsevier B.V.
关键词	Brachiopods Continental weathering Hydrothermal Mass balance model Permian Strontium isotopes
英文关键词	brachiopod; mass balance; Permian; seawater; stochasticity; strontium isotope; weathering; Brachiopoda; Hindeodus parvus
语种	英语
来源期刊	Earth Science Reviews
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/204161
作者单位	State Key Laboratory for Mineral Deposits Research, School of Earth Sciences and Engineering and Frontiers Science Center for Critical Earth Material Cycling, Nanjing University, 163 Xianlin Avenue, Nanjing, 210023, China; Department of Geology and Geophysics, Yale University, New Haven, CT 06511, United States; Dipartimento di Fisica e Scienze della Terra, Università di Ferrara, Ferrara, Italy; Institute for Geology, Mineralogy and Geophysics, Ruhr-University Bochum, Bochum, 44801, Germany; State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology and Center for Excellence in Life and Paleoenvironment, Chinese Academy of Sciences, 39 East Beijing Road, Nanjing, 210008, China; School of Resources and Geosciences, China University of Mining and Technology, 1 Daxue Road, Xuzhou, 221116, China
推荐引用方式 GB/T 7714	Wang W.-Q.,Katchinoff J.A.R.,Garbelli C.,et al. Revisiting the Permian seawater 87Sr/86Sr record: New perspectives from brachiopod proxy data and stochastic oceanic box models[J],2021,218.
APA	Wang W.-Q..,Katchinoff J.A.R..,Garbelli C..,Immenhauser A..,Zheng Q.-F..,...&Shen S.-Z..(2021).Revisiting the Permian seawater 87Sr/86Sr record: New perspectives from brachiopod proxy data and stochastic oceanic box models.Earth Science Reviews,218.
MLA	Wang W.-Q.,et al."Revisiting the Permian seawater 87Sr/86Sr record: New perspectives from brachiopod proxy data and stochastic oceanic box models".Earth Science Reviews 218(2021).