IOCAS-IR  > 海洋地质与环境重点实验室
Geochemical and isotopic compositions of East Rift lavas from the Manus Basin: Implications for the origin of subduction components
Wang, Xiong1,2; Huang, Peng1,3,4; Huang, Haijun3; Hu, Ningjing5
2020-05-29
Source PublicationGEOLOGICAL JOURNAL
ISSN0072-1050
Pages14
Corresponding AuthorHuang, Peng(huangpeng@ms.qdio.ac.cn)
AbstractMany recent studies have concluded that subduction components exist in the mantle source of the Manus back-arc basin lavas; however, the origin of these components remains an ongoing controversy. The East Rift at the eastern end of the Manus Basin is ideal for investigating the subduction components because of its unique geographic location. In this study, 10 samples from the East Rift were selected for geochemical and isotopic analysis. The results show that these samples can be compositionally divided into basaltic andesite and dacite belonging to the medium-K calc-alkaline series. Furthermore, the parental magma experienced fractional crystallization. The analyses also indicate that the subduction components came from the Solomon Plate and consist of altered oceanic crust (AOC) and sediments. The AOC materials entered the mantle source through fluids, while the sedimentary materials were transferred as melts. Assuming 5% partial melting of the sediments and 1% fluid production from the AOC in a modal melting process of an eclogitic source, the results of endmember modelling of Pb isotopic data reveal that the subduction components beneath the East Rift area consist of approximately 60-65% AOC fluids and 35-40% sediment melts and that the source contains approximately 1-5% subduction components.
KeywordEast Rift isotopic endmember modelling Manus Basin Solomon Plate subduction component
DOI10.1002/gj.3842
Indexed BySCI
Language英语
Funding ProjectNational Basic Research Program of China[2013CB429702] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA11030302] ; National Natural Science Foundation of China[41576055] ; National Natural Science Foundation of China[40606021]
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000535973900001
PublisherWILEY
Citation statistics
Document Type期刊论文
Identifierhttp://ir.qdio.ac.cn/handle/337002/167528
Collection海洋地质与环境重点实验室
Corresponding AuthorHuang, Peng
Affiliation1.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China
2.Univ Chinese Acad Sci, Beijing, Peoples R China
3.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao, Peoples R China
4.Chinese Acad Sci, Ctr Ocean Megasci, Qingdao, Peoples R China
5.Minist Nat Resources, Key Lab Marine Sedimentary & Environm Geol, Inst Oceanog 1, Qingdao, Peoples R China
First Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences
Corresponding Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences;  Center for Ocean Mega-Science, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Wang, Xiong,Huang, Peng,Huang, Haijun,et al. Geochemical and isotopic compositions of East Rift lavas from the Manus Basin: Implications for the origin of subduction components[J]. GEOLOGICAL JOURNAL,2020:14.
APA Wang, Xiong,Huang, Peng,Huang, Haijun,&Hu, Ningjing.(2020).Geochemical and isotopic compositions of East Rift lavas from the Manus Basin: Implications for the origin of subduction components.GEOLOGICAL JOURNAL,14.
MLA Wang, Xiong,et al."Geochemical and isotopic compositions of East Rift lavas from the Manus Basin: Implications for the origin of subduction components".GEOLOGICAL JOURNAL (2020):14.
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