Pluton incremental growth by multi-stage magma pulsations: Evidence from the Fangshan pluton, North China Craton

doi:10.1016/j.tecto.2022.229480

	Pluton incremental growth by multi-stage magma pulsations: Evidence from the Fangshan pluton, North China Craton
	Zhang, Zhe-Kun 1; Ling, Ming-Xing 1; Zhang, Li-Peng 2; Sun, Sai-Jun 2; Sun, Weidong2,3
	2022-09-05
发表期刊	TECTONOPHYSICS
ISSN	0040-1951
卷号	838 页码:16
通讯作者	Ling, Ming-Xing([email protected])
摘要	The Fangshan intrusive suite is a composite pluton in the North China Craton that resulted from incremental assembly of small magma batches. The pluton consists of four intrusive units with abundant mafic enclaves. Here we clarify its crystallisation history through zircon U-Pb dating, which indicates prolonged crystallisation of each intrusive unit at upper-crustal levels between 132.5 and 128.7 Ma. The magmas were episodically extracted from a deep storage area and ascended to the final intrusion level at a palaeo-depth of 10-16 km. Zircon trace element and Hf isotopic compositions and Ti-in-zircon temperature of the four intrusive units and mafic enclaves show significant differences and suggest that their crystallisation occurred in isotopically and chemically diverse magma batches. These magma batches formed in the lower crust from the mingling and mixing of various proportions of residual melts, derived from the fractional crystallisation of mafic magmas, with crustal partial melts at high temperatures. Four type of zircons were observed in mafic enclaves based on a simple textural classification, including antecrysts (type 1), xenocrysts (type 2 and type 3), and recrystallised zircon (type 4). Type 1 zircons were not formed at the emplacement level and are "antecrystic", having formed at a deeper, hotter level and been entrained into the ascending melts. Most type 2 zircons were captured from coarse-grained monzonite, and a very small number of grains were sourced from porphyritic granodiorite. Type 3 zircons display a core-rim texture, illustrating that xenocrysts may successively grow in mafic melts. Type 4 zircons display patchy zoning that represents a disequilibrium texture, manifested by the replacement of U-Th-REE-rich zircon by U-Th-REE-poor zircon, which occurred in response to magma mixing between mafic and felsic melts. This study shows that zircon chemistry coupled with detailed textural analyses can provide a powerful tool to elucidate the complex evolution of a magmatic system.
关键词	Zircon U-Pb geochronology Trace elements Hf isotopes Incremental magmatism
DOI	10.1016/j.tecto.2022.229480
收录类别	SCI
语种	英语
资助项目	Natural Science Foundation of China[42173024]; National Key Research and Development Program of China[2021YFC2901705]; Jiangxi Double Thousand Plan; State Key Laboratory of Nuclear Resources and Environment[2020Z03]
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:000893932900001
出版者	ELSEVIER
引用统计	被引频次：1[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/180983
专题	深海极端环境与生命过程研究中心
通讯作者	Ling, Ming-Xing
作者单位	1.East China Univ Technol, State Key Lab Nucl Resources & Environm, Nanchang 330013, Peoples R China 2.Chinese Acad Sci, Inst Oceanol, Ctr Deep Sea Res, Qingdao 266071, Peoples R China 3.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Mineral Resources, Qingdao 266237, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Zhe-Kun,Ling, Ming-Xing,Zhang, Li-Peng,et al. Pluton incremental growth by multi-stage magma pulsations: Evidence from the Fangshan pluton, North China Craton[J]. TECTONOPHYSICS,2022,838:16.
APA	Zhang, Zhe-Kun,Ling, Ming-Xing,Zhang, Li-Peng,Sun, Sai-Jun,&Sun, Weidong.(2022).Pluton incremental growth by multi-stage magma pulsations: Evidence from the Fangshan pluton, North China Craton.TECTONOPHYSICS,838,16.
MLA	Zhang, Zhe-Kun,et al."Pluton incremental growth by multi-stage magma pulsations: Evidence from the Fangshan pluton, North China Craton".TECTONOPHYSICS 838(2022):16.