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DOI	10.1016/j.chemer.2022.125924
	Elemental and boron isotopic variations in tourmaline in two-mica granite from the Cuona area, Tibet: Insights into the evolution of leucogranitic melt
	Xie, Guozhi; Yan, Haibo; Li, Guangming; Guo, Jia; Liu, Fang; Chen, Qian; Zhang, Rongqing; Zhang, Lipeng
发表日期	2023
ISSN	0009-2819
EISSN	1611-5864
卷号	83 期号:1
英文摘要	Two-mica granite is the most common magmatic rock type in the Himalayan leucogranite belt, which has close relationship with rare metal mineralization. Its genesis is generally attributed to magmatic differentiation. In recent years, the mineral geochemical compositions are increasingly used to study magmatic differentiation, which are significant for deciphering the melt evolution and element migration processes. In this study, in-situ major and trace element and boron isotope compositions for tourmalines from two-mica granites in the Cuona and Cuonadong leucogranites in the Cuona area are conducted to determine microscopic changes in mineral assemblages and geochemical compositions. Analytical results show that the tourmalines in the Cuonadong leucogranite were crystallized earlier relative to the tourmalines in the Cuona leucogranite during magmatic differentiation. The volatile contents have a genetic relationship with incompatible elements in tourmaline, which is possibly responsible for the formation of tourmaline zonation and the enrichment of Sr, Zn, and Pb during magmatic differentiation. The B isotopic composition of tourmaline in the Cuona area suggests that the granitic magma was dominantly derived from the partial melting of the metasedimentary source rocks. Their B isotope variations likely resulted from fluid exsolution during B-rich melt evolution. High rare metal contents in tourmalines indicate that the two-mica granites in the Cuona area may have great mineralization potential.
关键词	Himalayan leucogranite belt Tourmaline Boron isotope Magmatic differentiation Fluid exsolution
英文关键词	PEGMATITE SYSTEM; FLUID EVOLUTION; LEUKOGRANITE; FRACTIONATION; FLUORINE; RICH; CONSTRAINTS; HIMALAYA; ORIGIN; METAL
WOS研究方向	Geochemistry & Geophysics
WOS记录号	WOS:000962392900001
来源期刊	GEOCHEMISTRY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/283545
作者单位	Chinese Academy of Sciences; Institute of Oceanology, CAS; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS; Laoshan Laboratory; Chinese Academy of Sciences; Guangzhou Institute of Geochemistry, CAS; China Geological Survey; Chengdu Center, China Geological Survey; Chengdu University of Technology; Nanjing University; Nanjing University
推荐引用方式 GB/T 7714	Xie, Guozhi,Yan, Haibo,Li, Guangming,et al. Elemental and boron isotopic variations in tourmaline in two-mica granite from the Cuona area, Tibet: Insights into the evolution of leucogranitic melt[J],2023,83(1).
APA	Xie, Guozhi.,Yan, Haibo.,Li, Guangming.,Guo, Jia.,Liu, Fang.,...&Zhang, Lipeng.(2023).Elemental and boron isotopic variations in tourmaline in two-mica granite from the Cuona area, Tibet: Insights into the evolution of leucogranitic melt.GEOCHEMISTRY,83(1).
MLA	Xie, Guozhi,et al."Elemental and boron isotopic variations in tourmaline in two-mica granite from the Cuona area, Tibet: Insights into the evolution of leucogranitic melt".GEOCHEMISTRY 83.1(2023).