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
发表期刊JOURNAL OF MARINE SYSTEMS
卷号180页码:132-139
产权排序第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
摘要Mafic 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.
文章类型Article
关键词Mariana Trough Back-arc Basin Plagioclase Thermobarometry Magma Evolution
WOS标题词Science & Technology ; Physical Sciences ; Life Sciences & Biomedicine
DOI10.1016/j.jmarsys.2016.11.008
URL查看原文
收录类别SCI
语种英语
关键词[WOS]PLAGIOCLASE PHENOCRYSTS ; OKINAWA TROUGH ; BASALTS ; VOLCANO ; EVOLUTION ; BENEATH ; MANTLE ; LAVAS ; RIDGE ; CRUST
WOS类目Geosciences, Multidisciplinary ; Marine & Freshwater Biology ; Oceanography
WOS记录号WOS:000429514700012
引用统计
被引频次:1[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.idsse.ac.cn/handle/183446/5928
专题深海科学研究部_深海地质与地球化学研究室
通讯作者Lai, 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)
作者单位1.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
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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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