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Ca. 1.5 Ga 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
通讯作者Wei-Guang Zhu
2013
发表期刊Lithos
卷号168–169期号:1页码:85–98
其他摘要

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.


关键词Mesoproterozoic Mafic Intrusion Zircon And Baddeleyite Geochronology Yangtze Block Supercontinent Nuna/columbia Fe–ti–v Oxide Ore
学科领域矿床地球化学
收录类别SCI
语种英语
文献类型期刊论文
条目标识符http://ir.gyig.ac.cn/handle/352002/4964
专题矿床地球化学国家重点实验室_矿床地球化学国家重点实验室_期刊论文
矿床地球化学国家重点实验室
通讯作者Wei-Guang Zhu
推荐引用方式
GB/T 7714
Hong-Peng Fan,Wei-Guang Zhu,Zheng-Xiang Li,等. Ca. 1.5 Ga 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(1):85–98.
APA Hong-Peng Fan.,Wei-Guang Zhu.,Zheng-Xiang Li.,Hong Zhong.,Zhong-Jie Bai.,...&Chong-Yong Cao.(2013).Ca. 1.5 Ga 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(1),85–98.
MLA Hong-Peng Fan,et al."Ca. 1.5 Ga 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 168–169.1(2013):85–98.
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