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DOI	10.18654/1000.0569/2023.12.07
	Petrogenesis of I -type garnet-bearing granite in the Yangbajing area within the Gangdese Batholith, Tibet
	Li GuangXu; Zeng LingSen; Gao LiE; Yan LiLong; Zhao LingHao
发表日期	2023
ISSN	1000-0569
EISSN	2095-8927
起始页码	3619
结束页码	3640
卷号	39 期号:12
英文摘要	High silica granites ( HSGs) are common to large granitic batholiths worldwide. It is important for understanding crustal anatexis during arc magmatism and the evolution of continental crust. Within the Gangdese batholith, field observations and zircon U-Pb dating reveal a suite of HSGs occurred in the Yangbajing area, which formed at 64.9 +/- 0. 3Ma similar to 64. 1 0. 3Ma. Here, the petrographic, mineralogical, whole -rock geochemical and isotopic composition were carried out on the Yangbajing granite, and the results show that: (1) it belongs to the high -K calc-alkaline series, with high content of SiO2 and K2O, but low MgO, MnO, CaO and P2O5, and a gull -like REE pattern, and strong negative Eu anomalies, and enrichment in K, Rb, Pb, Th and U, and depletion of Nb, Ti and P; (2) magmatic garnets with almandine and spessartite significant enrichment in HREE, Sc, Y, and Zn, attributed to strong fractional crystallization of plagioclase; (3) fractional crystallization of plagioclase with high An components has also resulted in the decrease of Al/NK ratio in the evolved magma, which increased the solubility of zircon; and (4) zircon Hf and whole rock Nd isotopic compositions show enrichment characteristics (epsilon(Hf)(t) = -17. 1 similar to -11. 7; epsilon(Nd) ( = - 9. 0 similar to - 7. 6), suggesting that the melting of ancient crust magmatic materials and then underwent strong fractional crystallization, leading to the formation of I -type garnet -bearing granite.
关键词	Gangdese batholith Yangbajing I -type garnet -bearing granites Fractional crystallization Melt structure
英文关键词	U-PB GEOCHRONOLOGY; WOMAN PIUTE RANGE; S-TYPE GRANITES; ISOTOPE GEOCHEMISTRY; ZR/HF FRACTIONATION; MAGMATIC GARNET; LU-HF; EVOLUTION; SATURATION; LIQUIDS
WOS研究方向	Geology
WOS记录号	WOS:001152994000007
来源期刊	ACTA PETROLOGICA SINICA
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/283454
作者单位	China Geological Survey; Chinese Academy of Geological Sciences; Institute of Geology, Chinese Academy of Geological Sciences; China Geological Survey; Institute of Geology, Chinese Academy of Geological Sciences; Chinese Academy of Geological Sciences; China Geological Survey; National Research Center for Geoanalysis, Chinese Academy of Geological Sciences; Chinese Academy of Geological Sciences
推荐引用方式 GB/T 7714	Li GuangXu,Zeng LingSen,Gao LiE,et al. Petrogenesis of I -type garnet-bearing granite in the Yangbajing area within the Gangdese Batholith, Tibet[J],2023,39(12).
APA	Li GuangXu,Zeng LingSen,Gao LiE,Yan LiLong,&Zhao LingHao.(2023).Petrogenesis of I -type garnet-bearing granite in the Yangbajing area within the Gangdese Batholith, Tibet.ACTA PETROLOGICA SINICA,39(12).
MLA	Li GuangXu,et al."Petrogenesis of I -type garnet-bearing granite in the Yangbajing area within the Gangdese Batholith, Tibet".ACTA PETROLOGICA SINICA 39.12(2023).