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Strontium and carbon isotopic evidence for decoupling of pCO2 from continental weathering at the apex of the late Paleozoic glaciation
Jitao Chen (陈吉涛)1,2,3; Isabel P. Montañez1; Yuping Qi (祁玉平)2,3; Shuzhong Shen (沈树忠)2,4; Xiangdong Wang (王向东)2,3
2018
Source PublicationGeology
ISSN0091-7613
Volume46Issue:5Pages:395-398
Abstract

Earth's penultimate icehouse (ca. 340-285 Ma) was a time of low atmospheric pCO(2) and high pO(2), formation of the supercontinent Pangaea, dynamic glaciation in the Southern Hemisphere, and radiation of the oldest tropical rainforests. Although it has been long appreciated that these major tectonic, climatic, and biotic events left their signature on seawater Sr-87/Sr-86 through their influence on Sr fluxes to the ocean, the temporal resolution and precision of the late Paleozoic seawater Sr-87/Sr-86 record remain relatively low. Here we present a high-temporal-resolution and high-fidelity record of Carboniferous-early Permian seawater Sr-87/Sr-86 based on conodont bioapatite from an open-water carbonate slope succession in south China. The new data define a rate of long-term rise in Sr-87/Sr-86 (0.000035/m.y.) from ca. 334-318 Ma comparable to that of the middle to late Cenozoic. The onset of the rapid decline in Sr-87/Sr-86 (0.000043/m.y.), following a prolonged plateau (318-303 Ma), is constrained to ca. 303 Ma. A major decoupling of Sr-87/Sr-86 and pCO(2) during 303-297 Ma, coincident with the Paleozoic peak in pO(2), widespread low-latitude aridification, and demise of the pan-tropical wetland forests, suggests a major shift in the dominant influence on pCO(2) from continental weathering and organic carbon sequestration (as coals) on land to organic carbon burial in the ocean.

DOI10.1130/G40093.1
Indexed BySCI
Language英语
WOS KeywordAtmospheric Co2 Levels ; Ice-age ; South China ; Climate ; Record ; Seawater ; Aridification ; Sr-87/sr-86 ; Tectonics ; Australia
WOS Research AreaGeology
WOS SubjectGeology
WOS IDWOS:000431359800006
Citation statistics
Document Type期刊论文
Identifierhttp://ir.nigpas.ac.cn/handle/332004/14002
Collection中国科学院南京地质古生物研究所
Affiliation1.Univ Calif Davis, Dept Earth & Planetary Sci, Davis, CA 95616 USA
2.Chinese Acad Sci, Ctr Excellence Life & Paleoenvironm, Nanjing 210008, Jiangsu, Peoples R China
3.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, Key Lab Econ Stratig & Palaeogeog, Nanjing 210008, Jiangsu, Peoples R China
4.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, Nanjing 210008, Jiangsu, Peoples R China
Recommended Citation
GB/T 7714
Jitao Chen ,Isabel P. Montañez,Yuping Qi ,et al. Strontium and carbon isotopic evidence for decoupling of pCO2 from continental weathering at the apex of the late Paleozoic glaciation[J]. Geology,2018,46(5):395-398.
APA Jitao Chen ,Isabel P. Montañez,Yuping Qi ,Shuzhong Shen ,&Xiangdong Wang .(2018).Strontium and carbon isotopic evidence for decoupling of pCO2 from continental weathering at the apex of the late Paleozoic glaciation.Geology,46(5),395-398.
MLA Jitao Chen ,et al."Strontium and carbon isotopic evidence for decoupling of pCO2 from continental weathering at the apex of the late Paleozoic glaciation".Geology 46.5(2018):395-398.
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