气候变化领域集成服务门户(CCPortal): Impacts of basin restriction on geochemistry and extinction patterns: A case from the Guadalupian Delaware Basin, USA

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DOI	10.1016/j.epsl.2019.115876
	Impacts of basin restriction on geochemistry and extinction patterns: A case from the Guadalupian Delaware Basin, USA
	Smith B.P.; Larson T.; Martindale R.C.; Kerans C.
发表日期	2020
ISSN	0012821X
卷号	530
英文摘要	Geochemical data from carbonates often constrain the nature of environmental change during biotic turnover events. Many ancient carbonates, however, formed in geographically-isolated basins subject to local environmental factors, resulting in varying extinction rates between open ocean and restricted settings. It follows that high-resolution data from restricted basins may help unravel poorly-understood biotic crises such as the Mid-Capitanian extinction, which had especially high extinction rates in restricted settings. This study examines factors controlling salinity, stratification, and oxygenation in the Capitanian (Middle Permian) Delaware Basin, USA. Elemental and carbon isotope measurements from time-equivalent strata reveal differences between shallow- and deep-water masses, pointing to local controls such as stratification and de-oxygenated bottom water. Basinal dolomites and evaporites mark periods of elevated salinity tied to sea-level lowstands, which correspond with turnovers in fusulinid and brachiopod communities. Faunal turnover in the Delaware Basin demonstrates a fundamental attribute of restricted basins: water chemistry is often tightly coupled to physical process such as sea level change. We suggest that the relationships among sea level fluctuations, chemical changes, and biotic turnover may explain why the Capitanian mass extinction was more severe in isolated basins than the open ocean. © 2019 Elsevier B.V.
关键词	carbon isotope chemostratigraphy carbonate geochemistry Delaware Basin Guadalupian Mid-Capitanian extinction restricted basin
英文关键词	Carbonates; Confined flow; Geochemistry; Isotopes; Chemostratigraphy; Delaware Basin; Environmental factors; Fundamental attributes; Guadalupian; High resolution data; restricted basin; Sea-level fluctuations; Sea level; carbon isotope; carbonate rock; chemostratigraphy; depositional environment; geochemistry; mass extinction; sea level change; Delaware Basin; Permian Basin; United States; Fusulinida
语种	英语
来源期刊	Earth and Planetary Science Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/202894
作者单位	Jackson School of Geosciences, Department of Geological Sciences, The University of Texas at Austin, Austin, TX 78712, United States; Bureau of Economic Geology, John A. and Catherine G. Jackson School of Geosciences, University of Texas at Austin, 10100 Bureau Road, Building 130, Austin, TX 78713-8924, United States
推荐引用方式 GB/T 7714	Smith B.P.,Larson T.,Martindale R.C.,et al. Impacts of basin restriction on geochemistry and extinction patterns: A case from the Guadalupian Delaware Basin, USA[J],2020,530.
APA	Smith B.P.,Larson T.,Martindale R.C.,&Kerans C..(2020).Impacts of basin restriction on geochemistry and extinction patterns: A case from the Guadalupian Delaware Basin, USA.Earth and Planetary Science Letters,530.
MLA	Smith B.P.,et al."Impacts of basin restriction on geochemistry and extinction patterns: A case from the Guadalupian Delaware Basin, USA".Earth and Planetary Science Letters 530(2020).