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DOI: 10.1016/j.palaeo.2013.10.002
论文题名:
Rare earth element and SrNd isotope geochemistry of phosphate nodules from the lower Cambrian Niutitang Formation, NW Hunan Province, South China
作者: Zhu B.; Jiang S.-Y.; Yang J.-H.; Pi D.; Ling H.-F.; Chen Y.-Q.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2014
卷: 398
起始页码: 132
结束页码: 143
语种: 英语
英文关键词: Lower Cambrian ; Niutitang ; Phosphate nodules ; Rare earth elements ; South China ; SrNd isotopes
英文摘要: Phosphate nodules are widely distributed in the early Cambrian black shale sequence in Yangtze platform, South China. In this study, we carried out X-ray diffraction, major element, rare earth element, and Sr. Nd isotopic studies on phosphate nodules from two PC-C sections in Hunan Province, South China. Two different types of phosphate nodules can be recognized based on REE and Nd isotopic characteristics: type 1 with seawater-like REE patterns, higher εNd(t) values; and type 2 with hat-shaped REE patterns and more negative εNd(t) values. We suggest that the difference in REE patterns and Nd isotopic compositions between the two types reflects changes in pore water geochemistry from seawater-dominated towards diagenetic fluid-dominated conditions during early diagenesis. Positive Eu anomalies are displayed in most samples, and are likely to record not only the anoxic environments but also the involvement of submarine exhalative hydrothermal fluids which prevailed in South China during early Cambrian. © 2013 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/69428
Appears in Collections:过去全球变化的重建

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作者单位: Institute of Isotope Hydrology, School of Earth Sciences and Engineering, Hohai University, Nanjing 210098, China; State Key Laboratory of Geological Processes and Mineral Resources, Faculty of Earth Resources, China University of Geosciences, Wuhan 430074, China; State Key Laboratory for Mineral Deposits Research, Department of Earth Sciences, Nanjing University, Nanjing 210093, China; Tarim Oilfield Company Exploration and Development Research Institute, Kuerle 841000, Xinjiang Province, China

Recommended Citation:
Zhu B.,Jiang S.-Y.,Yang J.-H.,et al. Rare earth element and SrNd isotope geochemistry of phosphate nodules from the lower Cambrian Niutitang Formation, NW Hunan Province, South China[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2014-01-01,398
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