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DOI	10.1016/j.palaeo.2020.109668
	High-precision U-Pb zircon age constraints on the Guadalupian in West Texas; USA
	Wu Q.; Ramezani J.; Zhang H.; Yuan D.-X.; Erwin D.H.; Henderson C.M.; Lambert L.L.; Zhang Y.-C.; Shen S.-Z.
发表日期	2020
ISSN	0031-0182
卷号	548
英文摘要	The Guadalupian Epoch was characterized by major changes in paleogeography, paleoclimate, and biodiversity. Yet, the paucity of precise and accurate radioisotopic dates from the Guadalupian stages in their type area, Guadalupe Mountains National Park in West Texas has rendered their calibration inadequate. In this study, we report high-precision U-Pb zircon geochronology by the CA-ID-TIMS method from three ash beds (2σ internal errors only) in the Rader Member of the Bell Canyon Formation at the Back Ridge Section (262.127 ± 0.097 Ma, MSWD = 0.89, n = 3), the lower Pinery Member of the Bell Canyon Formation at the Frijole Section (264.23 ± 0.13 Ma, MSWD = 0.89, n = 8) and the basal South Wells Member of the Cherry Canyon Formation at the Monolith Canyon Section (266.525 ± 0.078 Ma, MSWD = 0.62, n = 5). The Bayesian interpolation statistics method is used to establish an age-stratigraphy model that estimates the base of the Capitanian to be 264.28 ± 0.16 Ma, serving as the best age estimate for the Capitanian Stage at present. In addition, we review the existing geochronology from the Guadalupian Series in West Texas and seek to propose more precise temporal estimates of Guadalupian geological and biological events. These data constrain the high-frequency sequences of the Cherry Canyon and Bell Canyon formations in the Guadalupe Mountains National Park area. Accordingly, the base of the Wordian is estimated at 266.9 ± 0.4 Ma and the Illawarra geomagnetic polarity reversal in West Texas at 267.4 ± 0.4 Ma to 266.5 ± 0.3 Ma. The global end-Guadalupian extinction began in the conodont zone of Jinogondolella altudaensis above the base of the Reef Trail Member of the Bell Canyon Formation and might continue to the Clarkina postbitteri postbitteri Zone in the earliest Wuchiapingian. The conodonts display a rapid evolutionary rate during this interval. This constrains the biotic crisis from ca. 260 Ma to 259 Ma based on our conodont age estimation. The emplacement of the Emeishan Large Igneous Province (ELIP) in South China has been constrained to ca. 260 Ma to 257.4 Ma based on zircon U-Pb geochronology by the CA-ID-TIMS method, overlapping with the end-Guadalupian extinction, which provides support for the temporal relationship between them. Additionally, the ELIP persisted into the early Wuchiapingian and may have hampered ecosystem restoration during the post-extinction interval. © 2020 Elsevier B.V.
英文关键词	Bayesian model; Conodont biostratigraphy; Emeishan Large Igneous Province; Illawarra Reversal; Mass extinction; Zircon U-Pb geochronology
语种	英语
scopus关键词	Bayesian analysis; biostratigraphy; calibration; conodont; geochronology; interpolation; large igneous province; Lotka-Volterra model; magnetic reversal; mass extinction; model; uranium-lead dating; zircon; China; United States; Clarkina
来源期刊	Palaeogeography, Palaeoclimatology, Palaeoecology
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/150522
作者单位	Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing, 210008, China; University of Science and Technology of China, Hefei, 230026, China; School of Earth Sciences and Engineering, Nanjing University, 163 Xianlin Avenue, Nanjing, 210023, China; Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA 02139, United States; Department of Paleobiology, MRC-121, National Museum of Natural History, Washington, DC 20013-7012, United States; Department of Geoscience, University of Calgary, Calgary, AB T2N 1N4, Canada; Department of Geological Sciences, University of Texas at San Antonio, One UTSA Circle, San Antonio, TX 78249, United States
推荐引用方式 GB/T 7714	Wu Q.,Ramezani J.,Zhang H.,et al. High-precision U-Pb zircon age constraints on the Guadalupian in West Texas; USA[J],2020,548.
APA	Wu Q..,Ramezani J..,Zhang H..,Yuan D.-X..,Erwin D.H..,...&Shen S.-Z..(2020).High-precision U-Pb zircon age constraints on the Guadalupian in West Texas; USA.Palaeogeography, Palaeoclimatology, Palaeoecology,548.
MLA	Wu Q.,et al."High-precision U-Pb zircon age constraints on the Guadalupian in West Texas; USA".Palaeogeography, Palaeoclimatology, Palaeoecology 548(2020).