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Ca. 1.5Ga mafic magmatism in South China during the break-up of the supercontinent Nuna/Columbia: The Zhuqing Fe-Ti-V oxide ore-bearing mafic intrusions in western Yangtze Block
Hong-Peng Fan; Wei-Guang Zhu; Zheng-Xiang Li; Hong Zhong; Zhong-Jie Bai; De-Feng He; Cai-Jie Chen; Chong-Yong Cao
2013
Source PublicationLithos
Volume168-169Pages:85-98
Abstract

Secondary ion mass spectroscopy (SIMS) zircon and baddeleyite U–Pb ages, elemental, and Nd isotopic data are reported for the Zhuqing Fe–Ti–V oxide ore-bearing mafic intrusions in western Yangtze Block, South China. The mafic intrusions are dated at 1494 ± 6 Ma (zircon U–Pb), 1486 ± 3 Ma (baddeleyite U–Pb) and 1490 ± 4 Ma (baddeleyite U–Pb). The intrusions are dominantly gabbros that experienced variable degrees of alteration. All the studied rocks are high-Ti and alkaline in composition, and exhibit light rare earth element enrichment and “humped” incompatible trace-element patterns with no obvious Nb–Ta depletion, similar to intraplate alkali basaltic rocks in continental flood basalt (CFB) and ocean island basalt (OIB) provinces. Negative εNd(T) values (− 0.97 to − 3.58) and fractionation of the HREE of these rocks indicate that they were derived from a time-integrated, slightly enriched asthenospheric mantle source with minor crustal contamination. Like other Fe–Ti oxide mineralized rocks in plume-related layered intrusions or large igneous provinces around the world, the Zhuqing gabbros likely occurred in an intraplate setting. The ~ 1.5 Ga mafic magmatism was likely part of the global 1.6–1.2 Ga anorogenic magmatism related to the break-up of the supercontinent Nuna/Columbia, suggesting that the Yangtze Block may have been a component of the supercontinent.

KeywordMesoproterozoic mafic Intrusion zircon And Baddeleyite Geochronology yangtze Block supercontinent Nuna/columbia fe–ti–v Oxide Ore
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.gyig.ac.cn/handle/42920512-1/11088
Collection矿床地球化学国家重点实验室
Affiliation1.State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, 46 Guanshui Road, Guiyang 550002, China
2.ARC Center of Excellence for Core to Crust Fluid Systems (CCFS) and The Institute for Geoscience Research (TIGeR), Department of Applied Geology, Curtin University, GPO Box U1987, Perth, Western Australia 6845, Australia
3.University of Chinese Academy of Sciences, Beijing 100049, China
4.Geological Team 601, Sichuan Bureau of Metallurgical Geology and Mineral Exploration, Panzhihua 617027, China
Recommended Citation
GB/T 7714
Hong-Peng Fan,Wei-Guang Zhu,Zheng-Xiang Li,et al. Ca. 1.5Ga mafic magmatism in South China during the break-up of the supercontinent Nuna/Columbia: The Zhuqing Fe-Ti-V oxide ore-bearing mafic intrusions in western Yangtze Block[J]. Lithos,2013,168-169:85-98.
APA Hong-Peng Fan.,Wei-Guang Zhu.,Zheng-Xiang Li.,Hong Zhong.,Zhong-Jie Bai.,...&Chong-Yong Cao.(2013).Ca. 1.5Ga mafic magmatism in South China during the break-up of the supercontinent Nuna/Columbia: The Zhuqing Fe-Ti-V oxide ore-bearing mafic intrusions in western Yangtze Block.Lithos,168-169,85-98.
MLA Hong-Peng Fan,et al."Ca. 1.5Ga mafic magmatism in South China during the break-up of the supercontinent Nuna/Columbia: The Zhuqing Fe-Ti-V oxide ore-bearing mafic intrusions in western Yangtze Block".Lithos 168-169(2013):85-98.
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