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The magma plumbing system in the Mariana Trough back-arc basin at 18 degrees N
Lai, Zhiqing1,2; Zhao, Guangtao1,2; Han, Zongzhu1,2; Huang, Bo3; Li, Min4; Tian, Liyan5; Liu, Bo1,2; Bu, Xuejiao1,2; Lai, Zhiqing(Minist Educ, Key Lab Submarine Geosci & Prospecting Tech, Qingdao 266100, Peoples R China); Zhao, Guangtao(Minist Educ, Key Lab Submarine Geosci & Prospecting Tech, Qingdao 266100, Peoples R China)
2018-04-01
Source PublicationJOURNAL OF MARINE SYSTEMS
Volume180Pages:132-139
Contribution Rank第1完成单位 ; 第2完成单位 ; 第3完成单位 ; 第4完成单位 ; 第5完成单位
AbstractMafic magmas are common in back-arc basin, once stalled in the crust, these magmas may undergo different evolution. In this paper, compositional and textural variations of plagioclase as well as mineral-melt geothermobarometry are presented for basalts erupted from the central Mariana Trough (CMT). These data reveal crystallization conditions and we attempt a reconstruction of the magma plumbing system of the CMT. Plagioclase megacrysts, phenocrysts, microphenocrysts, microlites, olivine, spinel, and clinopyroxene have been recognized in basalt samples, using BSE images and compositional features. The last three minerals are homogeneous as microphenocrysts. Mineral-melt barometry indicates that plagiodase crystals crystallized and eventually grew into phenocrysts and megacrysts in mush zone with depth of 5-9 km, in which the normal zoning plagioclases crystallized in the interval of various batches of basic magma recharging. Plagioclase megacrysts and phenocrysts were dissolved and/or resorbed, when new basic magmas injected into the mush zone near Moho depth. It is inferred that magma extracted from the mush zone, and adiabatically ascended via different pathways. Some basaltic magmas underwent plagioclase and clinopyroxene microphenocrysts crystallization in low-pressure before eruption. Plagioclase microlites and outermost rims probably crystallized after eruption. (C) 2016 Elsevier B.V. All rights reserved.
SubtypeArticle
KeywordMariana Trough Back-arc Basin Plagioclase Thermobarometry Magma Evolution
WOS HeadingsScience & Technology ; Physical Sciences ; Life Sciences & Biomedicine
DOI10.1016/j.jmarsys.2016.11.008
URL查看原文
Indexed BySCI
Language英语
WOS KeywordPLAGIOCLASE PHENOCRYSTS ; OKINAWA TROUGH ; BASALTS ; VOLCANO ; EVOLUTION ; BENEATH ; MANTLE ; LAVAS ; RIDGE ; CRUST
WOS SubjectGeosciences, Multidisciplinary ; Marine & Freshwater Biology ; Oceanography
WOS IDWOS:000429514700012
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.idsse.ac.cn/handle/183446/5928
Collection深海科学研究部_深海地质与地球化学研究室
Corresponding AuthorLai, Zhiqing; Zhao, Guangtao; Lai, Zhiqing(Minist Educ, Key Lab Submarine Geosci & Prospecting Tech, Qingdao 266100, Peoples R China); Zhao, Guangtao(Minist Educ, Key Lab Submarine Geosci & Prospecting Tech, Qingdao 266100, Peoples R China)
Affiliation1.Minist Educ, Key Lab Submarine Geosci & Prospecting Tech, Qingdao 266100, Peoples R China
2.Ocean Univ China, Coll Marine Geosci, 238 Songling Rd, Qingdao 266100, Peoples R China
3.Natl Oceanog Ctr, Qingdao 266071, Peoples R China
4.Shandong Inst Ocean Resources Explorat, Qingdao 266555, Peoples R China
5.Chinese Acad Sci, Inst Deep Sea Sci & Engn, Sanya 572000, Peoples R China
Recommended Citation
GB/T 7714
Lai, Zhiqing,Zhao, Guangtao,Han, Zongzhu,et al. The magma plumbing system in the Mariana Trough back-arc basin at 18 degrees N[J]. JOURNAL OF MARINE SYSTEMS,2018,180:132-139.
APA Lai, Zhiqing.,Zhao, Guangtao.,Han, Zongzhu.,Huang, Bo.,Li, Min.,...&Zhao, Guangtao.(2018).The magma plumbing system in the Mariana Trough back-arc basin at 18 degrees N.JOURNAL OF MARINE SYSTEMS,180,132-139.
MLA Lai, Zhiqing,et al."The magma plumbing system in the Mariana Trough back-arc basin at 18 degrees N".JOURNAL OF MARINE SYSTEMS 180(2018):132-139.
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