Origin of transitional I-A-type syenite and its relationship to A-type intrusions in the Luzong Basin, the Lower Yangtze River Belt: Insights from geochemistry

doi:10.1016/j.chemgeo.2023.121458

	Origin of transitional I-A-type syenite and its relationship to A-type intrusions in the Luzong Basin, the Lower Yangtze River Belt: Insights from geochemistry
	Zhang, Jun-Jie 1,4; Sun, Sai-Jun 1,2; Zhang, Li-Peng 1,2; Deng, Jiang-Hong 1; Li, Shuang5 ; Sun, Wei-Dong1,3,4
	2023-06-05
发表期刊	CHEMICAL GEOLOGY
ISSN	0009-2541
卷号	626 页码:16
通讯作者	Sun, Sai-Jun([email protected]) ; Li, Shuang([email protected])
摘要	There are potential genetic relationships between I- and A-type granitoids, which remain obscure. The origin of transitional I-A-type intrusions could provide new clues for this issue and are important in deciphering the origin of A-type intrusions. Here we report geochemical and isotopic compositions of transitional I-A-type syenites (Makou pluton) from the Luzong Basin in the Lower Yangtze River Belt (LYRB). The Makou pluton is composed of gabbros and syenites. Zircon U-Pb ages reveal that it was formed at similar to 130 Ma, which was slightly earlier than typical A-type intrusions in the LYRB. Geochemical features indicate that the Makou syenites belong to transitional I-A-type igneous rocks. The Sr-Nd-O isotopic compositions and the correlation between major and trace elements of Makou gabbros and syenites suggest that they are cogenetic, whereas the syenites experienced further magma evolution. Geochemical characteristics, especially the high Nb content of gabbros, suggest that the mantle source of the Makou pluton was metasomatized by melts from subducted sediments and slabs, which is similar to Huangmeijian A-type intrusion in the Luzong Basin. Makou syenites have different evolution conditions, e.g., the temperature and oxygen fugacity, compared with the Huangmeijian A-type intrusion. The ferroan character of the Makou syenites was weakened by crystal fractionation at relatively high oxygen conditions to produce the transitional I-A-type intrusions, due to more addition of fluids derived from subducted slabs to the source. This is consistent with the partial melting of the metasomatized lithosphere mantle due to asthenosphere upwelling as a result of ridge subduction beneath the LYRB.
关键词	Luzong Basin Syenite A-type granitoid High Nb content Ridge subduction Oxygen fugacity
DOI	10.1016/j.chemgeo.2023.121458
收录类别	SCI
语种	英语
资助项目	National Natural Science Founda- tion of China[41903005]; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB42020303]; National Natural Science Foundation of China[41627803]
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:000983343900001
出版者	ELSEVIER
WOS关键词	ZIRCON U-PB ; VOLCANIC-BASIN ; EASTERN CHINA ; ISOTOPIC COMPOSITIONS ; METALLOGENIC BELT ; FRACTIONATED GRANITES ; CHEMICAL-COMPOSITION ; CONTINENTAL-CRUST ; RIDGE SUBDUCTION ; OXIDATION-STATE
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/337002/183045
专题	深海极端环境与生命过程研究中心
通讯作者	Sun, Sai-Jun; Li, Shuang
作者单位	1.Chinese Acad Sci, Inst Oceanol, Ctr Deep Sea Res, Qingdao 266071, Peoples R China 2.Laoshan Lab, Lab Marine Geol, Qingdao 266061, Peoples R China 3.Laoshan Lab, Deep Sea Multidisciplinary Res Ctr, Qingdao 266237, Peoples R China 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 5.Guilin Univ Technol, Coll Earth Sci, Guangxi Key Lab Hidden Met Ore Deposits Explorat, Guilin 541004, Peoples R China
第一作者单位	深海极端环境与生命过程研究中心
通讯作者单位	深海极端环境与生命过程研究中心
推荐引用方式 GB/T 7714	Zhang, Jun-Jie,Sun, Sai-Jun,Zhang, Li-Peng,et al. Origin of transitional I-A-type syenite and its relationship to A-type intrusions in the Luzong Basin, the Lower Yangtze River Belt: Insights from geochemistry[J]. CHEMICAL GEOLOGY,2023,626:16.
APA	Zhang, Jun-Jie,Sun, Sai-Jun,Zhang, Li-Peng,Deng, Jiang-Hong,Li, Shuang,&Sun, Wei-Dong.(2023).Origin of transitional I-A-type syenite and its relationship to A-type intrusions in the Luzong Basin, the Lower Yangtze River Belt: Insights from geochemistry.CHEMICAL GEOLOGY,626,16.
MLA	Zhang, Jun-Jie,et al."Origin of transitional I-A-type syenite and its relationship to A-type intrusions in the Luzong Basin, the Lower Yangtze River Belt: Insights from geochemistry".CHEMICAL GEOLOGY 626(2023):16.