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ZHOU Jie, GE Wei-ya, JIANG Yao-hui. Geochemical features and origin of Taoling pluton, eastern Jiangnan orogen[J]. GEOLOGY IN CHINA, 2014, 41(3): 838-850.
Citation: ZHOU Jie, GE Wei-ya, JIANG Yao-hui. Geochemical features and origin of Taoling pluton, eastern Jiangnan orogen[J]. GEOLOGY IN CHINA, 2014, 41(3): 838-850.
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Geochemical features and origin of Taoling pluton, eastern Jiangnan orogen

  • 1.

    Nanjing Center, China Geological Survey, Nanjing 210016, Jiangsu, China

  • 2.

    State Key Laboratory for Mineral Deposits Research, School of Earth Sciences and Engineering, Nanjing University, Nanjing 210093, Jiangsu, China

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  • Abstract：Taoling pluton is located in northeast Jiangxi Province in the eastern part of Jiangnan orogen. The pluton is characterized by high potassium calc alkaline series, weakly peraluminous - strongly peraluminous nature, and high Mg#. Taoling pluton is enriched in LREE and LREE, and depleted in HFSE, with weak negative Eu anomalies (δEu=0.62-0.81) (except for sample TL-1, whose δEu is 0.47). Zircon LA-ICPMS U-Pb dating shows that the pluton intruded at 140±1 Ma. The initial 87Sr/86Sr ratios and εNd(t) of the pluton are (0.7131-0.7141) and (-7.43 - -6.71), respectively. Combined with previous studies, the authors hold that the mafic magmas ascended from the metasomatized mantle and heated the lower crust, triggering partial melting of metasedimentary basement in the depth (＞40 km) to form Taoling pluton, with the addition of relatively small amounts of mantle-derived materials.
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