IOCAS-IR  > 海洋地质与环境重点实验室
Petrogenesis of volcanic rocks from Eastern Manus Basin: indications in mineralogy and geochemistry
Zhao Xia1,2,3; Tian Liyan1; Sun Jianhui1; Huang Peng2,4,5; Li Yan1,3; Gao Yue1,3
2020-04-17
Source PublicationJOURNAL OF OCEANOLOGY AND LIMNOLOGY
ISSN2096-5508
Pages21
Corresponding AuthorHuang Peng(huangpeng@qdio.ac.cn)
AbstractTo understand the petrogenesis and magma evolution history in the Eastern Manus Basin (EMB), geochemistry of pyroxene and plagioclase mineral phenocrysts in basaltic andesites and dacites were reported. The plagioclase-melt thermometry showed that, plagioclase in dacites crystalized in 1 027.2-1 028.5 degrees C under 3.37-5.08 kbar, whereas in basaltic andesite was 1 181.5-1 187.0 degrees C under 1.79-4.46 kbar. Pyroxene compositions and invariable La/Sm vs La values of whole rock powders indicate that lavas were erupted in rapid cooling rate and mainly controlled by fractional crystallization (FC). In addition, oscillatory zonings in plagioclase and pyroxene phenocrysts indicated small local perturbations and degassing episodes in the magma chamber. Some high Mg# clinopyroxene antecrysts were found in EMB lavas. The highest Mg# of parental EMB melts is 69, which falls into the range of initial partial melts from upper mantle peridotite source (68-75). In terms of isotopic compositions, the EMB lavas most likely originated from Indian-type MORB mantle which was influenced by subduction components. In details, the subduction components are mainly derived from the dehydration of a subducted altered oceanic crust, and the contribution of sediment influence is minor. The Pb isotopic compositions and end member modeling further suggest that the source of subduction components is more likely from the Pacific Plate instead of the Solomon Plate.
KeywordEastern Manus Basin plagioclase pyroxene whole rock Sr-Nd-Pb isotope magma
DOI10.1007/s00343-020-9308-1
Indexed BySCI
Language英语
Funding ProjectStrategic Priority Research Program of the Chinese Academy of Sciences[XDB42020303] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA11030302] ; National Natural Science Foundation of China[41576055] ; National Basic Research Program of China (973 Program)[2013CB429702]
WOS Research AreaMarine & Freshwater Biology ; Oceanography
WOS SubjectLimnology ; Oceanography
WOS IDWOS:000565844100001
PublisherSCIENCE PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.qdio.ac.cn/handle/337002/168514
Collection海洋地质与环境重点实验室
Corresponding AuthorHuang Peng
Affiliation1.Chinese Acad Sci, Inst Deep Sea Sci & Engn, CAS Key Lab Expt Study Deep Sea Extreme, Sanya 572000, Peoples R China
2.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Chinese Acad Sci, Ctr Ocean Megasci, Qingdao 266071, Peoples R China
5.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao 266061, 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
Zhao Xia,Tian Liyan,Sun Jianhui,et al. Petrogenesis of volcanic rocks from Eastern Manus Basin: indications in mineralogy and geochemistry[J]. JOURNAL OF OCEANOLOGY AND LIMNOLOGY,2020:21.
APA Zhao Xia,Tian Liyan,Sun Jianhui,Huang Peng,Li Yan,&Gao Yue.(2020).Petrogenesis of volcanic rocks from Eastern Manus Basin: indications in mineralogy and geochemistry.JOURNAL OF OCEANOLOGY AND LIMNOLOGY,21.
MLA Zhao Xia,et al."Petrogenesis of volcanic rocks from Eastern Manus Basin: indications in mineralogy and geochemistry".JOURNAL OF OCEANOLOGY AND LIMNOLOGY (2020):21.
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