The syncollisional granitoid magmatism and crust growth during the West Qinling Orogeny, China: Insights from the Jiaochangba pluton

doi:10.1002/gj.3368

IOCAS-IR

	The syncollisional granitoid magmatism and crust growth during the West Qinling Orogeny, China: Insights from the Jiaochangba pluton
	Kong, Juanjuan 1,2,3; Niu, Yaoling 1,2,4,5; Duan, Meng 5; Shao, Fengli1,2,3 ; Xiao, Yuanyuan 1,2; Zhang, Yu2 ; Guo, Pengyuan 1,2; Sun, Pu1,2,3 ; Gong, Hongmei 1,2
	2019-11-01
发表期刊	GEOLOGICAL JOURNAL
ISSN	0072-1050
卷号	54 期号:6 页码:4014-4033
通讯作者	Kong, Juanjuan([email protected]) ; Niu, Yaoling([email protected])
摘要	The West Qinling Orogenic Belt (WQOB) is a major portion of the Qinling-Dabie-Sulu Orogen and holds essential information for understanding the protracted evolution of the north-eastern branch of the Paleo-Tethys in East Asia. In this study, we report our petrological, geochemical, and geochronological study on the five Triassic granitoid plutons of West Qinling with emphasis on the poorly studied Jiaochangba pluton with zircon U-Pb ages of 217.5 +/- 1.6 Ma and 215.2 +/- 1.2 Ma. The new data and the existing data on the other four plutons support the view that the West Qinling granitoids represent a magmatic response to the continental collision of the Yangtze Block (YB) with the North China Craton (NCC) in the Triassic. Like the other four plutons, the Jiaochangba pluton shows strong light rare earth element (REE) enrichment and weak heavy REE depletion ([La/Sm](N) approximate to 7.14 +/- 1.89; [Sm/Yb](N) approximate to 4.63 +/- 1.85) with varying negative Eu anomalies (Eu/Eu* approximate to 0.65 +/- 0.20). In the N-MORB normalized diagram, all the samples show relative enrichment in Rb, Pb, U, and K with negative Nb, Ta, P, and Ti anomalies, resembling those of the model continental crust. The Jiaochangba pluton has relatively lower (Sr-87/Sr-86)(i) (0.7062 to 0.7081), higher epsilon(Nd)(t) (-6.91 to -2.09), and epsilon(Hf)(t) (-5.57 to -0.14) than mature continental crust, which are consistent with their source being dominated by lower crust with significant mantle contributions. Mantle-derived melt, which formed from partial melting of mantle wedge peridotite facilitated by dehydration of the subducted/subducting Mianlue ocean crust, provide the required heat for the crustal melting while also contributing to the compositions of these granitoids. Evolution of such parental magmas in open system crustal magma chambers with continued evolution/replenishment and crustal contamination and assimilation give rise to the observed petrological and geochemical characteristics of these granitoids.
关键词	continental collision Jiaochangba granitoids lower crust melting petrogenesis West Qinling
DOI	10.1002/gj.3368
收录类别	SCI
语种	英语
资助项目	Qingdao National Laboratory[U1606401]; Qingdao National Laboratory[2015ASKJ03]; NSFC[41130314]; NSFC[41630968]
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000496020400044
出版者	WILEY
引用统计	被引频次：12[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/337002/164824
专题	中国科学院海洋研究所
通讯作者	Kong, Juanjuan; Niu, Yaoling
作者单位	1.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Shandong, Peoples R China 2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao, Shandong, Peoples R China 3.Univ Chinese Acad Sci, Beijing, Peoples R China 4.Univ Durham, Dept Earth Sci, Durham DH1 3LE, England 5.China Univ Geosci, Sch Earth Sci & Resources, Beijing, Peoples R China
第一作者单位	中国科学院海洋研究所
通讯作者单位	中国科学院海洋研究所
推荐引用方式 GB/T 7714	Kong, Juanjuan,Niu, Yaoling,Duan, Meng,et al. The syncollisional granitoid magmatism and crust growth during the West Qinling Orogeny, China: Insights from the Jiaochangba pluton[J]. GEOLOGICAL JOURNAL,2019,54(6):4014-4033.
APA	Kong, Juanjuan.,Niu, Yaoling.,Duan, Meng.,Shao, Fengli.,Xiao, Yuanyuan.,...&Gong, Hongmei.(2019).The syncollisional granitoid magmatism and crust growth during the West Qinling Orogeny, China: Insights from the Jiaochangba pluton.GEOLOGICAL JOURNAL,54(6),4014-4033.
MLA	Kong, Juanjuan,et al."The syncollisional granitoid magmatism and crust growth during the West Qinling Orogeny, China: Insights from the Jiaochangba pluton".GEOLOGICAL JOURNAL 54.6(2019):4014-4033.

条目包含的文件
文件名称/大小	文献类型	版本类型	开放类型	使用许可
gj.3368.pdf（2290KB）	期刊论文	出版稿	限制开放	CC BY-NC-SA	浏览