Petrogenesis of Lingshan highly fractionated granites in the Southeast China: Implication for Nb-Ta mineralization

doi:10.1016/j.oregeorev.2017.06.029

CORC > 地质与地球物理研究所 > 中国科学院地质与地球物理研究所 > 岩石圈演化国家重点实验室

	Petrogenesis of Lingshan highly fractionated granites in the Southeast China: Implication for Nb-Ta mineralization
	Xiang, Yuan-Xin 1,2; Yang, Jin-Hui 1,2; Chen, Jing-Yuan 3; Zhang, Yang 1,2
刊名	ORE GEOLOGY REVIEWS
	2017-10-01
卷号	89 页码:495-525
关键词	Nb-Ta mineralization Highly-fractionated granite Petrogenesis Hydrothermal activity South China
ISSN号	0169-1368
DOI	10.1016/j.oregeorev.2017.06.029
文献子类	Article
英文摘要	Whole rock major and trace element and Sr-, Nd- and Hf-isotope data, together with zircon U-Pb, Hf- and O-isotope data, are reported for the Nb-Ta ore bearing granites from the Lingshan pluton in the Southeastern China, in order to trace their petrogenesis and related Nb-Ta mineralization. The Lingshan pluton contains hornblende-bearing biotite granite in the core and biotite granite, albite granite and pegmatite at the rim. In addition, numerous mafic microgranular enclaves occur in the Lingshan granites. Zircon SIMS U-Pb dating gives consistent crystallization ages of ca. 132 Ma for the Lingshan granitoids and enclaves, consistent with the Nb-Ta mineralization age of similar to 132 Ma, indicating that mafic and felsic magmatism and Nb-Ta mineralization are coeval. The biotite granites contain hornblende, and are metaluminous to weakly peraluminous, with high initial Sr-87/Sr-86 ratios of 0.7071-0.7219, negative epsilon(Nd)(t) value of -5.9 to -0.3, epsilon(Hf)(t) values of -3.63 to -0.32 for whole rocks, high delta O-18 values and negative epsilon(Hf)(t) values for zircons, and ancient Hf and Nd model ages of 1.41-0.95 Ga and 1.23-1.04 Ga, indicating that they are I-type granites and were derived from partial melting of ancient lower crustal materials. They have variable mineral components and geochemical features, corresponding extensive fractionation of hornblende, biotite and feldspar, with minor fractionation of apatite. Existence of mafic microgranular enclaves in the biotite granites suggests a magma mixing/mingling process for the origin of the Lingshan granitoids, and mantle-derived mafic magmas provided the heat for felsic magma generation. In contrast, the Nb-Ta mineralized albite granites and pegmatites have distinct mineral components and geochemical features, which show that they are highly-fractionated granites with extensive melt and F-rich fluid interaction in the generation of these rocks. The fluoride-rich fluids induce the enrichment in Nb and Ta in the highly evolved melts. Therefore, we conclude that the Nb-Ta mineralization is the result of hydrothermal process rather than crystal fractionation in the Lingshan pluton, which provides a case to identify magmatic and hydrothermal processes and evaluate their relative importance as ore forming processes. (C) 2017 Elsevier B.V. All rights reserved.
WOS关键词	A-TYPE GRANITES ; I-TYPE GRANITES ; EARTH-ELEMENT PATTERNS ; RARE-METAL GRANITES ; LACHLAN FOLD BELT ; S-TYPE GRANITES ; HF-O ISOTOPES ; ZIRCON U-PB ; GEOCHEMICAL CHARACTERISTICS ; MICROGRANITOID ENCLAVES
WOS研究方向	Geology ; Mineralogy ; Mining & Mineral Processing
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000413126900025
资助机构	Chinese Ministry of Science and Technology(2012CB416702) ; Chinese Ministry of Science and Technology(2012CB416702) ; Hundred Talent and Ten Thousands Talent Program ; Hundred Talent and Ten Thousands Talent Program ; Chinese Ministry of Science and Technology(2012CB416702) ; Chinese Ministry of Science and Technology(2012CB416702) ; Hundred Talent and Ten Thousands Talent Program ; Hundred Talent and Ten Thousands Talent Program ; Chinese Ministry of Science and Technology(2012CB416702) ; Chinese Ministry of Science and Technology(2012CB416702) ; Hundred Talent and Ten Thousands Talent Program ; Hundred Talent and Ten Thousands Talent Program ; Chinese Ministry of Science and Technology(2012CB416702) ; Chinese Ministry of Science and Technology(2012CB416702) ; Hundred Talent and Ten Thousands Talent Program ; Hundred Talent and Ten Thousands Talent Program
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/61998]
专题	地质与地球物理研究所_岩石圈演化国家重点实验室
通讯作者	Yang, Jin-Hui
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Changan Univ, Coll Earth Sci & Resources, Xian 710054, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Xiang, Yuan-Xin,Yang, Jin-Hui,Chen, Jing-Yuan,et al. Petrogenesis of Lingshan highly fractionated granites in the Southeast China: Implication for Nb-Ta mineralization[J]. ORE GEOLOGY REVIEWS,2017,89:495-525.
APA	Xiang, Yuan-Xin,Yang, Jin-Hui,Chen, Jing-Yuan,&Zhang, Yang.(2017).Petrogenesis of Lingshan highly fractionated granites in the Southeast China: Implication for Nb-Ta mineralization.ORE GEOLOGY REVIEWS,89,495-525.
MLA	Xiang, Yuan-Xin,et al."Petrogenesis of Lingshan highly fractionated granites in the Southeast China: Implication for Nb-Ta mineralization".ORE GEOLOGY REVIEWS 89(2017):495-525.