Analysis of X-Ray Fluorescence Spectroscopy and Plasma Mass Spectrometry of the Guidong Granite Body and Its Implications to Granite Evolution
LI Hong-wei1, 2, CHEN Guo-neng1*, PENG Zhuo-lun1
1. Department of the Earth Science of Sun Yat-Sen University, Guangzhou 510275, China 2. Guangdong Geological Survey Institute, Guangzhou 510080, China
Abstract：The Guidong composite granite body (CGB) located in the north Guangdong Province consists of numerous rock bodies formed respectively in the early and late Jurassic and early Cretaceous. Analysis of the granites of different period with X-ray fluorescence spectroscopy and plasma mass spectrometry indicates: (1) From the top of a granite body downwards, the felsic components of rock decrease, while the mafic and ∑REE, LREE/HREE, (La/Yb)N, as well as δEu value increase, suggesting the material differentiation in the in-situ melting of crustal rocks and crystallisation of magma; (2) From old to young of the different period granite-massifs in the Guidong CGB, the felsic compositions totally decrease, and the mafic components, ∑REE, LREE/HREE, (La/Yb)N, and δEu value increase as well, implying multiple crustal melting (remelting) events in the Mesozoic in this area; and (3) Primitive mantle-normalized spider diagram for trace elements of Guidong CGB suggests high maturity of the crust involved in the in-situ melting.
Key words：X-ray fluorescence spectroscopy;Plasma mass spectrometry;Guidong granite body;In-situ melting
李宏卫1, 2，陈国能1*，彭卓伦1 . 贵东岩体X荧光光谱、等离子体质谱分析结果及其对岩体演化的指示意义 [J]. 光谱学与光谱分析, 2013, 33(07): 1965-1968.
LI Hong-wei1, 2, CHEN Guo-neng1*, PENG Zhuo-lun1 . Analysis of X-Ray Fluorescence Spectroscopy and Plasma Mass Spectrometry of the Guidong Granite Body and Its Implications to Granite Evolution . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2013, 33(07): 1965-1968.
