DOI: 10.1016/j.epsl.2019.115876
论文题名: Impacts of basin restriction on geochemistry and extinction patterns: A case from the Guadalupian Delaware Basin, USA
作者: Smith B.P. ; Larson T. ; Martindale R.C. ; Kerans C.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2020
卷: 530 语种: 英语
中文关键词: 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
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. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/165272
Appears in Collections: 气候变化与战略
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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
Recommended Citation:
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]. Earth and Planetary Science Letters,2020-01-01,530