globalchange  > 影响、适应和脆弱性
DOI: 10.1016/j.epsl.2018.03.051
Scopus记录号: 2-s2.0-85045181846
论文题名:
Carboniferous climate teleconnections archived in coupled bioapatite δ18OPO4 and 87Sr/86Sr records from the epicontinental Donets Basin, Ukraine
作者: Montañez I.P.; Osleger D.J.; Chen J.; Wortham B.E.; Stamm R.G.; Nemyrovska T.I.; Griffin J.M.; Poletaev V.I.; Wardlaw B.R.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2018
卷: 492
起始页码: 89
结束页码: 101
语种: 英语
英文关键词: bioapatite isotopic compositions ; epicontinental sea ; glacioeustasy ; late Paleozoic Ice Age ; seawater oxygen isotopic composition ; seawater strontium isotopic composition
Scopus关键词: Geochronology ; Isotopes ; Phosphate minerals ; Sea level ; Seawater ; Stratigraphy ; epicontinental sea ; glacioeustasy ; Isotopic composition ; Late paleozoic ice age ; Oxygen isotopic composition ; Climate change ; apatite ; Carboniferous ; climate variation ; glacioeustacy ; inland sea ; isotopic composition ; oxygen isotope ; paleoclimate ; paleotemperature ; reconstruction ; seawater ; strontium isotope ; teleconnection ; Donets Basin ; Ukraine
英文摘要: Reconstructions of paleo-seawater chemistry are largely inferred from biogenic records of epicontinental seas. Recent studies provide considerable evidence for large-scale spatial and temporal variability in the environmental dynamics of these semi-restricted seas that leads to the decoupling of epicontinental isotopic records from those of the open ocean. We present conodont apatite δ18OPO4 and 87Sr/86Sr records spanning 24 Myr of the late Mississippian through Pennsylvanian derived from the U–Pb calibrated cyclothemic succession of the Donets Basin, eastern Ukraine. On a 2 to 6 Myr-scale, systematic fluctuations in bioapatite δ18OPO4 and 87Sr/86Sr broadly follow major shifts in the Donets onlap–offlap history and inferred regional climate, but are distinct from contemporaneous more open-water δ18OPO4 and global seawater Sr isotope trends. A −1 to −6‰ offset in Donets δ18OPO4 values from those of more open-water conodonts and greater temporal variability in δ18OPO4 and 87Sr/86Sr records are interpreted to primarily record climatically driven changes in local environmental processes in the Donets sea. Systematic isotopic shifts associated with Myr-scale sea-level fluctuations, however, indicate an extrabasinal driver. We propose a mechanistic link to glacioeustasy through a teleconnection between high-latitude ice changes and atmospheric pCO2 and regional monsoonal circulation in the Donets region. Inferred large-magnitude changes in Donets seawater salinity and temperature, not archived in the more open-water or global contemporaneous records, indicate a modification of the global climate signal in the epicontinental sea through amplification or dampening of the climate signal by local and regional environmental processes. This finding of global climate change filtered through local processes has implications for the use of conodont δ18OPO4 and 87Sr/86Sr values as proxies of paleo-seawater composition, mean temperature, and glacioeustasy. © 2018 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109907
Appears in Collections:影响、适应和脆弱性
气候变化事实与影响

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作者单位: Department of Earth and Planetary Sciences, University of California, Davis, CA 95616, United States; CAS Key Laboratory of Economic Stratigraphy and Palaeogeography, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing, 210008, China; U.S. Geological Survey, Eastern Geology and Paleoclimate Science Center, MS-926A, Reston, VA 20192, United States; Department of Paleontology and Stratigraphy, Institute of Geological Science, Ukrainian Academy of Sciences, Kiev, Ukraine; Dept. of Earth and Environmental Sciences, University of California, Santa Barbara, CA, United States

Recommended Citation:
Montañez I.P.,Osleger D.J.,Chen J.,et al. Carboniferous climate teleconnections archived in coupled bioapatite δ18OPO4 and 87Sr/86Sr records from the epicontinental Donets Basin, Ukraine[J]. Earth and Planetary Science Letters,2018-01-01,492
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