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Carboniferous climate teleconnections archived in coupled bioapatite delta O-18(PO4) and Sr-87/Sr-86 records from the epicontinental Donets Basin, Ukraine
Montanez, Isabel P.1; Osleger, Dillon J.1,5; Chen, Jitao (陈吉涛)1,2; Wortham, Barbara E.1; Stamm, Robert G.3; Nemyrovska, Tamara I.4; Griffin, Julie M.1; Poletaev, Vladislav I.4; Wardlaw, Bruce R.3
2018-06-15
Source PublicationEARTH AND PLANETARY SCIENCE LETTERS
ISSN0012-821X
Volume492Pages:89-101
Abstract

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 delta O-18(PO4) and Sr-87/Sr-86 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 delta O-18(PO4) and Sr-87/Sr-86 broadly follow major shifts in the Donets onlap-offlap history and inferred regional climate, but are distinct from contemporaneous more open-water delta O-18(PO4) and global seawater Sr isotope trends. A -1 to -6 parts per thousand offset in Donets delta O-18(PO4) values from those of more open-water conodonts and greater temporal variability in delta O-18(PO4) and Sr-87/Sr-86 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 pCO(2) 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 delta O-18(PO4) and Sr-87/Sr-86 values as proxies of paleo-seawater composition, mean temperature, and glacioeustasy. (C) 2018 Elsevier B.V. All rights reserved.

KeywordLate Paleozoic Ice Age Bioapatite Isotopic Compositions Epicontinental Sea Glacioeustasy Seawater Oxygen Isotopic Composition Seawater Strontium Isotopic Composition
DOI10.1016/j.epsl.2018.03.051
Language英语
WOS KeywordPaleozoic Ice-age ; Conodont Apatite Delta-o-18 ; Oxygen Isotopes ; Midcontinent Sea ; North-america ; Carbon-cycle ; Circulation ; Calibration ; Phosphate ; Salinity
Funding ProjectNSF Sedimentary Geology and Paleobiology Program[EAR-1024737] ; NSF Sedimentary Geology and Paleobiology Program[EAR-1338281]
WOS Research AreaGeochemistry & Geophysics
WOS SubjectGeochemistry & Geophysics
WOS IDWOS:000432762000009
Funding OrganizationNSF Sedimentary Geology and Paleobiology Program
PublisherELSEVIER SCIENCE BV
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.nigpas.ac.cn/handle/332004/18667
Collection中国科学院南京地质古生物研究所
其他
Corresponding AuthorMontanez, Isabel P.; Osleger, Dillon J.
Affiliation1.Univ Calif Davis, Dept Earth & Planetary Sci, Davis, CA 95616 USA
2.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, CAS Key Lab Econ Stratig & Palaeogeog, Nanjing 210008, Jiangsu, Peoples R China
3.US Geol Survey, Eastern Geol & Paleoclimate Sci Ctr, MS-926A, Reston, VA 20192 USA
4.Ukrainian Acad Sci, Inst Geol Sci, Dept Paleontol & Stratig, Kiev, Ukraine
5.Univ Calif Santa Barbara, Dept Earth & Environm Sci, Santa Barbara, CA 93106 USA
Recommended Citation
GB/T 7714
Montanez, Isabel P.,Osleger, Dillon J.,Chen, Jitao ,et al. Carboniferous climate teleconnections archived in coupled bioapatite delta O-18(PO4) and Sr-87/Sr-86 records from the epicontinental Donets Basin, Ukraine[J]. EARTH AND PLANETARY SCIENCE LETTERS,2018,492:89-101.
APA Montanez, Isabel P..,Osleger, Dillon J..,Chen, Jitao .,Wortham, Barbara E..,Stamm, Robert G..,...&Wardlaw, Bruce R..(2018).Carboniferous climate teleconnections archived in coupled bioapatite delta O-18(PO4) and Sr-87/Sr-86 records from the epicontinental Donets Basin, Ukraine.EARTH AND PLANETARY SCIENCE LETTERS,492,89-101.
MLA Montanez, Isabel P.,et al."Carboniferous climate teleconnections archived in coupled bioapatite delta O-18(PO4) and Sr-87/Sr-86 records from the epicontinental Donets Basin, Ukraine".EARTH AND PLANETARY SCIENCE LETTERS 492(2018):89-101.
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