| 江西三清山花岗岩体的元素地球化学特征及其地质意义 |
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| 引用本文： | 叶张煌,刘嘉麒,尹国胜,陈安泽,李晓东. 江西三清山花岗岩体的元素地球化学特征及其地质意义[J]. 桂林工学院学报, 2013, 0(2): 200-208 |
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| 作者姓名： | 叶张煌 刘嘉麒 尹国胜 陈安泽 李晓东 |
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| 作者单位： | [1]中国地质大学地球科学与资源学院,北京100083 [2]核资源与环境省部共建国家重点实验室培育基地（东华理工大学）,南昌330013 [3]中国科学院地质与地球物理研究所,北京100029 [4]江西省地质调查研究院,南昌330030 [5]中国地质科学院,北京100037 [6]核工业二七0研究所,南昌330200 |
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| 基金项目： | 中央高校基本科研业务费专项项目（2011PY0156）; 三清山地质公园科研项目,写作过程中得到中国地质大学（北京）博士生欧阳荷根、张东阳等同学的热心指导和帮助,特别是审稿人提出了许多宝贵的意见,在此表示由衷的感谢! |
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| 摘 要： | 江西三清山国家地质公园以花岗岩地质与花岗岩峰林地貌著称。通过对岩体各个相带的样品进行主微量元素分析,结果显示,三清山花岗岩体具有较高的硅、铝和碱的含量（SiO2=72.29%～79.26%,Al2O3=11.21%～14.28%,Na2O＋K2O=5.25%～10.04%）贫镁铁,总体上为过铝质高钾钙碱性岩系列。三清山花岗岩体微量元素接近陆壳值,富集大离子亲石元素。轻重稀土分馏不明显（LREE/HREE=3.53～13.56,（La/Yb）N=1.80～13.46）,属轻稀土富集型（Sm/Nd=0.154～0.292）,具有明显的负铕异常（δEu=0.002～0.211）。分析表明,三清山花岗岩体经历了较高程度的演化,系一定程度的斜长石结晶分异的产物。三清山花岗岩具有A型花岗岩的特点,源区为成熟度较高的壳源变泥质岩的部分融熔。在构造环境上指示俯冲已经结束,三清山岩体可能形成于造山后的拉张环境。
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| 关 键 词： | 花岗岩体 地球化学特征 地质意义 三清山 |
Element Geochemical Characteristics and Geological Implication of Sanqingshan Pluton in Jiangxi |
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| YE Zhang-huang,LIU Jia-qi,YIN Guo-sheng,CHEN An-ze,LI Xiao-dong. Element Geochemical Characteristics and Geological Implication of Sanqingshan Pluton in Jiangxi[J]. Journal of Guilin University of Technology, 2013, 0(2): 200-208 |
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| Authors: | YE Zhang-huang LIU Jia-qi YIN Guo-sheng CHEN An-ze LI Xiao-dong |
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| Affiliation: | 1.School of Earth Sciences and Resources,China University of Geosciences,Beijing 100083,China;2.State Key Laboratory Breeding Base of Nuclear Resources and Environment,East China Institute of Technology,Nanchang 330013,China;3.Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China;4.Geological Survey of Jiangxi Province,Nanchang 330030,China;5.Chinese Academy of Geological Sciences,Beijing 100037,China;6.Research Institute No.270,CNNC,Nanchang 330200,China) |
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| Abstract: | Granite geology and granite peak forest landform are well known in Mt.Sanqingshan of Jiangxi.Major trace element analysis of samples in different phases shows that silicon,aluminum and alkali content in Mt.Sanqingshan pluton is high（SiO2 = 72.29%-79.26%,Al2O3 = 11.21%-14.28%,Na2O ＋ K2O = 5.25% 10.04%）,magnesium and iron content is low.Generally they belong to peraluminous high-K calc-alkaline rock series.The trace elements are close to the value of the continental crust,enriched in large ion lithophile elements.Fractionation between HREE and LREE is not obvious（LREE / HREE = 3.53-13.56,（La / Yb） N = 1.80-13.46））,belonging to light rare earth enriched type（Sm / Nd = 0.154-0.292）,with strong negative Eu anomaly（δEu = 0.002-0.211）.Analysis shows that Mt.Sanqingshan pluton is the product of crystallization differentiation of plagioclase,experienced a higher evolution and A-type granite characteristics,with partial melting of matapelite of the crust source region.Tectonic environment subduction ended,entering an extensional environment of post-orogenic. |
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| Keywords: | granite pluton geochemical characteristics geological implication Mt.Sanqingshan |
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