气候变化领域集成服务门户(CCPortal): Petrogenesis of aplites in the Ke'eryin rare metal orefield in the Songpan-Garze Fold Belt, Eastern Tibet: Evidence from mineralogy, geochemistry, geochronology and Hf-Nd isotopes

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DOI	10.1016/j.lithos.2023.107017
	Petrogenesis of aplites in the Ke'eryin rare metal orefield in the Songpan-Garze Fold Belt, Eastern Tibet: Evidence from mineralogy, geochemistry, geochronology and Hf-Nd isotopes
	Fei, Guangchun; Li, Tianrui; Menuge, Julian F.; Hui, Ziqi; Yuan, Yanwei; Zhu, Huipai; Tan, Hua; Cai, Yunhua; Tang, Wenchun; Yang, Guibing; Luo, Xiaolong; Chen, Zhiping; Chen, Xi; Yun, Hu
发表日期	2023
ISSN	0024-4937
EISSN	1872-6143
卷号	438
英文摘要	The Ke'eryin pluton, in the Triassic central Songpan-Garze Fold Belt, Eastern Tibet, China, hosts multiple, broadly orogenic granites but also less well studied aplites. We present mineralogy, geochemistry, geochronology and Hf-Nd isotopic data for Ke'eryin orefield aplites of the Li-mineralized Lijiagou area. Biotite compositions and whole-rock A/CNK values (0.98-1.24) suggest that the Lijiagou aplites are of peraluminous S-type granitic affinity. The aplite samples are characterized by enrichment in LREEs [(La/Yb)N = 11.0-96.3], with strongly negative Eu anomalies (Eu/Eu* = 0.44-0.56). They are generally enriched in Cs, Rb, Th and Hf, but relatively depleted in Ba, Sr, P and Ti. Zircons from two aplite samples yield weighted mean 206Pb/238U ages of 219.6 +/- 1.2 Ma and 208.9 +/- 1.3 Ma, respectively, the latter sample also yielding a monazite weighted mean 208Pb/232Th age of 207.1 +/- 1.3 Ma. The average zircon crystallization temperatures of the two samples are 729 and 829 degrees C, with low oxygen fugacity (Delta FMQ-2.3 to-2.0). In situ Hf and Nd isotopic analyses on zircon and monazite yield epsilon Hf(t) and epsilon Nd(t) values of-6.24 to-2.49, and-8.7 to-7.9, respectively. In light of the aforementioned observations, the aplites are interpreted to be produced at a post-collisional orogenic setting, originating from partial melting of ancient metasedimentary rocks in the lower crust. Except for biotites in the Ke'eryin aplite, other minerals and whole-rocks have low concentrations of rare metals, suggesting that the aplites do not have rare metal mineralization potential.
关键词	U-Pb geochronology Mineral chemisty Mineralization potential Ke?eryin aplite Songpan-Garze Fold Belt
英文关键词	ELEMENT GRANITIC PEGMATITES; TRIASSIC GRANITOIDS; WESTERN SICHUAN; JACK HILLS; ZIRCON; DEPOSIT; CHINA; FRACTIONATION; BIOTITES; MONAZITE
WOS研究方向	Geochemistry & Geophysics ; Mineralogy
WOS记录号	WOS:000923126200001
来源期刊	LITHOS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/283372
作者单位	Chengdu University of Technology; Chengdu University of Technology; University College Dublin; University College Dublin; Southwest Petroleum University
推荐引用方式 GB/T 7714	Fei, Guangchun,Li, Tianrui,Menuge, Julian F.,et al. Petrogenesis of aplites in the Ke'eryin rare metal orefield in the Songpan-Garze Fold Belt, Eastern Tibet: Evidence from mineralogy, geochemistry, geochronology and Hf-Nd isotopes[J],2023,438.
APA	Fei, Guangchun.,Li, Tianrui.,Menuge, Julian F..,Hui, Ziqi.,Yuan, Yanwei.,...&Yun, Hu.(2023).Petrogenesis of aplites in the Ke'eryin rare metal orefield in the Songpan-Garze Fold Belt, Eastern Tibet: Evidence from mineralogy, geochemistry, geochronology and Hf-Nd isotopes.LITHOS,438.
MLA	Fei, Guangchun,et al."Petrogenesis of aplites in the Ke'eryin rare metal orefield in the Songpan-Garze Fold Belt, Eastern Tibet: Evidence from mineralogy, geochemistry, geochronology and Hf-Nd isotopes".LITHOS 438(2023).