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Carbon and conodont apatite oxygen isotope records of Guadalupian-Lopingian boundary sections: Climatic or sea-level signal?
Chen, Bo (陈波)1,3; Joachimski, Michael M.1; Sun, Yadong2; Shen, Shuzhong (沈树忠)3; Lai, Xulong2,4
2011-11-15
Source PublicationPALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
ISSN0031-0182
Volume311Issue:3-4Pages:145-153
Abstract

The Guadalupian-Lopingian (G-L) boundary (260.4 Ma) is one of the major extinction events in Earth history that coincides with the Emeishan Large Igneous Province and palaeoclimatic changes. Carbon isotopes of whole rock samples were studied in order to document changes in the global carbon cycle. In contrast to earlier studies, we observe no major negative excursion in delta(13)C in the middle Capitanian. A positive delta(13)C excursion is observed in the latest Capitanian with a 1.5 parts per thousand increase registered in the J. xuanhanensis Zone to C. postbitteri hongshuiensis Subzone, followed by a decrease of 1 parts per thousand within the C. postbitteri postbitteri Subzone and a 2 parts per thousand. decrease in the C. dukouensis to C. asymmetrica Zone. Oxygen isotopes of conodonts from two G-L boundary sections were measured in order to reconstruct conodont habitat and potential changes in water temperature. Oxygen isotope ratios of gondolellid conodonts are higher in comparison to oxygen isotope ratios measured on hindeodid conodonts suggesting that gondollelids lived in cooler and thus deeper waters compared with hindeodids. The oxygen isotope record reconstructed from gondollelid conodonts suggests warming of water temperatures of about 4 degrees C in the late Capitanian (J. postsmata to J. granti Zone), cooling of about 6 to 8 degrees C across the G-L boundary and in the earliest Wuchiapingian, and again significant warming in the Wuchiapingian (C. dukouensis to C. liangshanensis Zone). The temperature increase can be correlated with the main phase of Emeishan volcanism suggesting that climatic warming may have resulted in an intensified hydrological cycle, fertilisation of the oceans and enhanced primary productivity, the latter documented in the positive late Capitanian carbon isotope excursion. However, changes in sea-level seem to parallel reconstructed water temperatures suggesting that changes in water depth in combination with superimposed climatic changes may be responsible for the observed temperature changes. This study documents that oxygen isotope studies on Permian conodonts should be performed on mono-generic conodont samples and that oxygen isotopes not only provide valuable palaeoclimatic information but also may help to constrain the life habitat of conodonts. (C) 2011 Elsevier B.V. All rights reserved.

KeywordGuadalupian Lopingian Conodont Carbon And Oxygen Isotopes Palaeoclimate
DOI10.1016/j.palaeo.2011.08.016
Language英语
WOS KeywordLarge Igneous Province ; Permo-triassic Boundary ; Paleozoic Ice-age ; Mass Extinction ; Sw China ; South China ; Eastern Australia ; Middle ; End ; Patterns
Funding ProjectGerman Science Foundation DFG[JO 219/9-1] ; Natural Science Foundation of China ; Chinese State Administration of Foreign Experts Affairs[B08030]
WOS Research AreaPhysical Geography ; Geology ; Paleontology
WOS SubjectGeography, Physical ; Geosciences, Multidisciplinary ; Paleontology
WOS IDWOS:000298201000001
Funding OrganizationGerman Science Foundation DFG ; Natural Science Foundation of China ; Chinese State Administration of Foreign Experts Affairs
PublisherELSEVIER SCIENCE BV
Citation statistics
Cited Times:45[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.nigpas.ac.cn/handle/332004/4160
Collection中国科学院南京地质古生物研究所
其他
Corresponding AuthorChen, Bo (陈波)
Affiliation1.Univ Erlangen Nurnberg, GeoZentrum Nordbayern, D-91054 Erlangen, Germany
2.China Univ Geosci, Fac Earth Sci, Wuhan 430074, Hubei, Peoples R China
3.Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, Nanjing 210008, Peoples R China
4.China Univ Geosci, Key Lab Biogeol & Environm Geol, Wuhan 430074, Hubei, Peoples R China
First Author AffilicationNanjing Institute of Geology and Palaeonotology,CAS
Corresponding Author AffilicationNanjing Institute of Geology and Palaeonotology,CAS
Recommended Citation
GB/T 7714
Chen, Bo ,Joachimski, Michael M.,Sun, Yadong,et al. Carbon and conodont apatite oxygen isotope records of Guadalupian-Lopingian boundary sections: Climatic or sea-level signal?[J]. PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,2011,311(3-4):145-153.
APA Chen, Bo ,Joachimski, Michael M.,Sun, Yadong,Shen, Shuzhong ,&Lai, Xulong.(2011).Carbon and conodont apatite oxygen isotope records of Guadalupian-Lopingian boundary sections: Climatic or sea-level signal?.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,311(3-4),145-153.
MLA Chen, Bo ,et al."Carbon and conodont apatite oxygen isotope records of Guadalupian-Lopingian boundary sections: Climatic or sea-level signal?".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 311.3-4(2011):145-153.
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