IOCAS-IR  > 深海极端环境与生命过程研究中心
Melt-Fluxed Melting of the Heterogeneously Mixed Lower Arc Crust: A Case Study from the Qinling Orogenic Belt, Central China
Wu, Kai1,2; Ling, Ming-Xing3,4; Hu, Yong-Bin1; Guo, Jia1,2; Jiang, Xiao-Yan1; Sun, Sai-Jun1; Liang, Hua-Ying1; Liu, Xu5; Sun, Weidong2,4,6,7
2018-06-01
Source PublicationGEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
ISSN1525-2027
Volume19Issue:6Pages:1767-1788
Corresponding AuthorLing, Ming-Xing(mxling@gig.ac.cn)
AbstractAdakitic rocks with high MgO content and lower crust affinity at convergent margins provide important constraints on arc crust evolution and regional tectonics. An integrated study on the only adakitic pluton with high MgO content and its mafic microgranular enclaves (MMEs) in the Early Paleozoic North Qinling arc terrane was conducted in this paper. Zircons from 2 host rock samples yielded identical weighted mean ages of 428 Ma. The MMEs contain two types of zircons: type 1 zircons share similar morphology, chemical composition, and indistinguishable age with those from the host rock; type 2 zircons yielded an older age of 450 Ma. The similarity in zircon Hf isotopic composition for these zircons indicates a cognate origin of the MMEs. However, the lower Ce4+/Ce3+, higher crystallization temperature and the LREE overabundance of type 2 zircons indicate that mafic intrusions in the lower arc crust were subjected to a post-magmatic event at similar to 450 Ma. Samples from the Tangzang pluton are characterized by typical adakitic geochemical features, and high MgO (Mg#: 50-52), Cr, Ni, and Ba contents. Considering their similar isotopic compositions with the Neoproterozoic metabasites in the North Qinling terrane, we argue that the Tangzang pluton was generated by crustal anatexis of two sources with contributions from the metasomatized mantle wedge. The mantle connection was achieved by aqueous melt-fluxed melting of a "hot zone'' in the lower arc crust. This implies that andesitic continental crust with Mg# of similar to 0.5 may also be associated with fluxed-melting of the lower arc crust.
DOI10.1029/2017GC007395
Indexed BySCI
Language英语
Funding ProjectNational Key R&D Program of China[2017YFC0602301] ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences[XDB18020102] ; Guangdong Natural Science Funds[2014A030306032] ; Guangdong Natural Science Funds[2015TQ01Z611] ; Youth Innovation Promotion Association CAS[2016315] ; Guangzhou Institute of Geochemistry, Chinese Academy of Sciences ; Sino Shaanxi Nuclear Industry Group
WOS Research AreaGeochemistry & Geophysics
WOS SubjectGeochemistry & Geophysics
WOS IDWOS:000445194000004
PublisherAMER GEOPHYSICAL UNION
Citation statistics
Document Type期刊论文
Identifierhttp://ir.qdio.ac.cn/handle/337002/160169
Collection深海极端环境与生命过程研究中心
Corresponding AuthorLing, Ming-Xing
Affiliation1.Chinese Acad Sci, Guangzhou Inst Geochem, CAS Key Lab Mineral & Metallogeny, Guangzhou, Guangdong, Peoples R China
2.Univ Chinese Acad Sci, Beijing, Peoples R China
3.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou, Guangdong, Peoples R China
4.Chinese Acad Sci, CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing, Peoples R China
5.Sino Shaanxi Nucl Ind Grp, Geol Team 211, Xian, Shaanxi, Peoples R China
6.Chinese Acad Sci, Ctr Deep Sea Res, Inst Oceanog, Qingdao, Peoples R China
7.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Mineral Resources, Qingdao, Peoples R China
Recommended Citation
GB/T 7714
Wu, Kai,Ling, Ming-Xing,Hu, Yong-Bin,et al. Melt-Fluxed Melting of the Heterogeneously Mixed Lower Arc Crust: A Case Study from the Qinling Orogenic Belt, Central China[J]. GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS,2018,19(6):1767-1788.
APA Wu, Kai.,Ling, Ming-Xing.,Hu, Yong-Bin.,Guo, Jia.,Jiang, Xiao-Yan.,...&Sun, Weidong.(2018).Melt-Fluxed Melting of the Heterogeneously Mixed Lower Arc Crust: A Case Study from the Qinling Orogenic Belt, Central China.GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS,19(6),1767-1788.
MLA Wu, Kai,et al."Melt-Fluxed Melting of the Heterogeneously Mixed Lower Arc Crust: A Case Study from the Qinling Orogenic Belt, Central China".GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS 19.6(2018):1767-1788.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Wu, Kai]'s Articles
[Ling, Ming-Xing]'s Articles
[Hu, Yong-Bin]'s Articles
Baidu academic
Similar articles in Baidu academic
[Wu, Kai]'s Articles
[Ling, Ming-Xing]'s Articles
[Hu, Yong-Bin]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Wu, Kai]'s Articles
[Ling, Ming-Xing]'s Articles
[Hu, Yong-Bin]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.