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Boron isotopic composition of Paleozoic brachiopod and coeval coral calcites in Yunnan-Guizhou Plateau, China
Ma, YQ (Ma,Yunqi)[1,2,5]; Xiao, YK (Xiao,Yingkai)[2]; He, MY (He,Maoyong)[2]; Xiao, J (Xiao,Jun)[3]; Shen, Q (Shen,Quan)[4]; Jiang, SX (Jiang,Shengxiang)[1]
2011-12-30
Source PublicationSCIENCE CHINA-EARTH SCIENCES
Volume54Issue:12Pages:1912-1925
Subtype期刊论文
Abstract

Boron isotope values in Paleozoic brachiopods and corals, collected from the Yunnan-Guizhou Plateau, China, can be used to constrain the boron isotope compositions of past oceans. All brachiopod shells and coral samples were screened for diagenetic recrystallization by cathodoluminescence microscopy, trace element geochemistry of B, Fe, Mn, Sr, and scanning electron microscopy. The boron isotope ratios for brachiopods in Silurian, Devonian, Carboniferous, and Triassic calcites are in the ranges 8.9aEuro degrees aEuro"14.0aEuro degrees, 8.8aEuro degrees aEuro"13.8aEuro degrees, 10.3aEuro degrees aEuro"16.3aEuro degrees, and 6.7aEuro degrees aEuro"12.4aEuro degrees, respectively. The boron isotope ratios of coral calcites in the Silurian, Devonian, and Permian are 9.1aEuro degrees aEuro"12.2aEuro degrees, 6.1%-13.8aEuro degrees, and 9.2aEuro degrees aEuro"16.1aEuro degrees, respectively. The delta (11)B values for both brachiopods and corals are significantly lower than those for modern biogenic carbonates, indicating that the Paleozoic oceans were depleted of delta (11)B by up to 10aEuro degrees. Our results are consistent with previous published studies. The boron isotope compositions of corals and brachiopods show the consistent trends. The low delta (11)B values may be explained by an enhanced riverine flux of boron from the continents.

Keywordboron isotope coral brachiopod Paleozoic
DOI10.1007/s11430-011-4263-5
Indexed BySCI
Language英语
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/10333
Collection加速器质谱中心
Corresponding AuthorJiang, SX (Jiang,Shengxiang)[1]
Affiliation1.Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China;
2.Key Laboratory of Salt Lake Resources and Chemistry, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008, China;
3.State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an 710075, China;
4.Geological Team 1, Yunnan Geoexploration and Development Bureau of Mineral Resources, Qujing 655000, China;
5.Graduate University of Chinese Academy of Sciences, Beijing 100049, China
Recommended Citation
GB/T 7714
Ma, YQ ,Xiao, YK ,He, MY ,et al. Boron isotopic composition of Paleozoic brachiopod and coeval coral calcites in Yunnan-Guizhou Plateau, China[J]. SCIENCE CHINA-EARTH SCIENCES,2011,54(12):1912-1925.
APA Ma, YQ ,Xiao, YK ,He, MY ,Xiao, J ,Shen, Q ,&Jiang, SX .(2011).Boron isotopic composition of Paleozoic brachiopod and coeval coral calcites in Yunnan-Guizhou Plateau, China.SCIENCE CHINA-EARTH SCIENCES,54(12),1912-1925.
MLA Ma, YQ ,et al."Boron isotopic composition of Paleozoic brachiopod and coeval coral calcites in Yunnan-Guizhou Plateau, China".SCIENCE CHINA-EARTH SCIENCES 54.12(2011):1912-1925.
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