Petrogenesis of the Xihuashan Granite in Southern Jiangxi Province, South China: Constraints from Zircon U-Pb Geochronology, Geochemistry and Nd Isotopes

	Petrogenesis of the Xihuashan Granite in Southern Jiangxi Province, South China: Constraints from Zircon U-Pb Geochronology, Geochemistry and Nd Isotopes
	YANG Jiehua; PENG Jiantang; ZHAO Junhong; FU Yazhou; YANG Chen; HONG Yinglong
	2012
发表期刊	Acta Geologica Sinica - English Edition
卷号	86 期号:1 页码:131-152
摘要	Mesozoic granitic intrusions are widely distributed in the Nanling region, South China, Yanshanian granites are closely connected with the formation of tungsten deposits. The Xihuashan granite is a typical representative of tungsten-bearing granite. The Xihuashan granite consists mainly of medium-grained porphyritic biotite granite, medium-grained biotite granite and fine-grained two-mica granite, which correspond to LA-ICP-MS zircon U-Pb ages of 155.5 +/- 0.4 Ma, 153.0 +/- 0.6 Ma and 152.8 +/- 0.9 Ma, respectively. Rocks from the Xihuashan mining area displays high SiO2 (73.85% to 76.49%) and Na2O+K2O contents (8.09% to 9.43%), belonging to high-K calc-alkaline series. They are metaluminous to weakly peraluminous with A/CNK values ranging from 0.96 to 1.06. All granites in this study area are rich in Rb, Th, U and Pb, and depleted in Ba, Sr, P, Ti, Nb and Eu, especially depleted in medium-grained biotite granite and fine-grained two-mica granite. The medium-grained porphyritic biotite granites usually have high LREE concentrations, whereas medium-grained biotite granite and fine-grained two-mica granite displays high HREE contents. Our geochemical data reveal that the studied rocks are highly fractionated I-type granite. The magma underwent strong magma differentiation with decreasing temperature and increasing oxygen fugacity, which may explain the formation of three types of distinct granites. Variations of Rb, Sr and Ba concentrations in different type granites were controlled by fractional crystallization of biotite and feldspar. Fractional crystallization of monazite, allanite and apatite resulted in LREE changes in granite, and formation of garnet mainly caused HREE changes. Granites from the Xihuashan mining area have relatively high eNd(t) values (9.77 to 11.46), indicating that they were probably generated by partial melting of underlying Proterozoic metasedimentary rocks with minor addition of juvenile crust or mantle-derived magmas.
关键词	U-pb Dating Of Zircon Geochemistry Nd Isotope Petrogenesis Of Xihuashan Granite Nanling Region
学科领域	矿床地球化学
收录类别	SCI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.gyig.ac.cn/handle/352002/4863
专题	矿床地球化学国家重点实验室_矿床地球化学国家重点实验室_期刊论文
推荐引用方式 GB/T 7714	YANG Jiehua,PENG Jiantang,ZHAO Junhong,et al. Petrogenesis of the Xihuashan Granite in Southern Jiangxi Province, South China: Constraints from Zircon U-Pb Geochronology, Geochemistry and Nd Isotopes[J]. Acta Geologica Sinica - English Edition,2012,86(1):131-152.
APA	YANG Jiehua,PENG Jiantang,ZHAO Junhong,FU Yazhou,YANG Chen,&HONG Yinglong.(2012).Petrogenesis of the Xihuashan Granite in Southern Jiangxi Province, South China: Constraints from Zircon U-Pb Geochronology, Geochemistry and Nd Isotopes.Acta Geologica Sinica - English Edition,86(1),131-152.
MLA	YANG Jiehua,et al."Petrogenesis of the Xihuashan Granite in Southern Jiangxi Province, South China: Constraints from Zircon U-Pb Geochronology, Geochemistry and Nd Isotopes".Acta Geologica Sinica - English Edition 86.1(2012):131-152.

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