Element Geochemical Characteristics and Geological Implication of Sanqingshan Pluton in Jiangxi
详细信息
- 责任者：Ye Zhanghuang (School of Earth Sciences and Resources ; China University of Geosciences ; Beijing 100083 ; China) ; Liu Jiaqi
- 刊名：Journal of Guilin University of Technology
- 出版年：2013
- 卷期：33(2)
- 关键词：花岗岩 ; granite ; 元素地球化学 ; elements geochemistry ; 江西 ; Jiangxi Province
- 页码：p.200-208
- 图表：illus., 2 tables, 38 refs.
- 分类号：0801
- issnNo：ISSN1674-9057
- isbnNo：CN45-1375/N
摘要
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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