气候变化领域集成服务门户(CCPortal): Magma hybridization and crust-mantle interaction revealed by mineralogical and geochemical footprints: a case study from the South Qilian Accretionary Belt at the northern Tibetan Plateau

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DOI	10.1080/00206814.2021.1975317
	Magma hybridization and crust-mantle interaction revealed by mineralogical and geochemical footprints: a case study from the South Qilian Accretionary Belt at the northern Tibetan Plateau
	Li, Jiyong; Xia, Yanqing; Jiang, Haoyuan; Zhang, Xilong; Zhang, Xiaobao; Wang, Yongchao; Lei, Tianzhu; Liu, Yanhong
通讯作者	Li, JY ; Xia, YQ (通讯作者)，Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Lanzhou, Peoples R China. ; Li, JY ; Xia, YQ (通讯作者)，Univ Chinese Acad Sci, Beijing, Peoples R China.
发表日期	2020
ISSN	0020-6814
EISSN	1938-2839
英文摘要	The relationship between mafic magmatic enclaves (MMEs) and host granitoids is ongoing debate due to their significant roles in understanding deep magmatisms and geodynamic processes. This paper reports on Early Palaeozoic granitoids and associated MMEs from the Delingha pluton in the South Qilian Accretionary Belt (NW China) to constrain their petrogenesis and draw implications. The MMEs, occurring as ellipsoidal to rounded shapes, are andesitic and have the same crystallization age (similar to 445 Ma) and mineral assemblage as the host granitoids. However, minor isotopic differences between them and compositional and textural disequilibria on minerals (e.g. plagioclase and amphibole) do not support a cumulate origin that the MMEs were formed at earlier stage of the same magmatic system, but forcefully reflect magma hybridization processes between mafic and felsic magmas, during which the hybridized magma was broken up into discrete enclaves by convective motion in the host felsic magma. Accordingly, the primitive compositions of the MMEs likely originated from metasomatized mantle wedge source, while mantle-derived melt underplated and partially melted the lower continental crust to form the host rocks with a certain mantle contribution. Thus, the Delingha pluton is the product of crust-mantle interaction at an active continental margin subduction setting rather than syn-collisional environment, indicating that subduction of the South Qilian Ocean located between the Central Qilian Block and the Oulongbuluke Block may have lasted till to similar to 445 Ma.
关键词	ZIRCON U-PB EARLY PALEOZOIC GRANITES CONTINENTAL COLLISION OROGENIC BELT MICROGRANULAR ENCLAVES SUBDUCTION INITIATION TECTONIC SIGNIFICANCE FELSIC MAGMATISM VOLCANIC-ROCKS QUANJI MASSIF
英文关键词	Granitoid-MME systems; Magma hybridization; Crust-mantle interaction; South Qilian Accretionary Belt
语种	英语
WOS研究方向	Geology
WOS类目	Geology
WOS记录号	WOS:000697209500001
来源期刊	INTERNATIONAL GEOLOGY REVIEW
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/254231
作者单位	[Li, Jiyong; Xia, Yanqing; Jiang, Haoyuan; Zhang, Xilong; Zhang, Xiaobao; Wang, Yongchao; Lei, Tianzhu; Liu, Yanhong] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Lanzhou, Peoples R China; [Li, Jiyong; Xia, Yanqing; Jiang, Haoyuan; Zhang, Xilong; Zhang, Xiaobao; Wang, Yongchao; Lei, Tianzhu; Liu, Yanhong] Key Lab Petr Resources, Lanzhou, Gansu, Peoples R China; [Li, Jiyong; Jiang, Haoyuan; Wang, Yongchao] Univ Chinese Acad Sci, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Li, Jiyong,Xia, Yanqing,Jiang, Haoyuan,et al. Magma hybridization and crust-mantle interaction revealed by mineralogical and geochemical footprints: a case study from the South Qilian Accretionary Belt at the northern Tibetan Plateau[J]. 中国科学院西北生态环境资源研究院,2020.
APA	Li, Jiyong.,Xia, Yanqing.,Jiang, Haoyuan.,Zhang, Xilong.,Zhang, Xiaobao.,...&Liu, Yanhong.(2020).Magma hybridization and crust-mantle interaction revealed by mineralogical and geochemical footprints: a case study from the South Qilian Accretionary Belt at the northern Tibetan Plateau.INTERNATIONAL GEOLOGY REVIEW.
MLA	Li, Jiyong,et al."Magma hybridization and crust-mantle interaction revealed by mineralogical and geochemical footprints: a case study from the South Qilian Accretionary Belt at the northern Tibetan Plateau".INTERNATIONAL GEOLOGY REVIEW (2020).