Petrogenesis of basalt from the middle Okinawa Trough: New insights from olivine-hosted melt inclusions

doi:10.1002/gj.3150

CORC > 海洋研究所 > 中国科学院海洋研究所 > 海洋地质与环境重点实验室

	Petrogenesis of basalt from the middle Okinawa Trough: New insights from olivine-hosted melt inclusions
	Li, Xiaohui 1,2; Zeng, Zhigang 1,2,3,4; Wang, Xiaoyuan 1,3; Chen, Shuai 1; Ma, Yao1 ; Yang, Huixin 1; Zhang, Yuxiang 1,2; Chen, Zuxing 1,2
刊名	GEOLOGICAL JOURNAL
	2018-11-01
卷号	53 期号:6 页码:3129-3146
关键词	basalt Okinawa Trough pyroxenite source silicate melt inclusions subducted sedimentary components
ISSN号	0072-1050
DOI	10.1002/gj.3150
通讯作者	Zeng, Zhigang(zgzeng@qdio.ac.cn)
英文摘要	Silicate melt inclusions (SMIs) in basalt from the middle Okinawa Trough are investigated in detail to understand the source geochemical characteristics and petrogenesis of the basalt. The middle Okinawa Trough basalts contain abundant SMIs within olivine phenocrysts. The major element compositions of the SMIs are analysed using an electron microprobe. After correcting for olivine postentrapment crystallization, the major element compositions of the SMIs are more variable in terms of SiO2 (49.7-54.8 wt%) and MgO (5.1-7.2 wt%) than those of the host basalt (SiO2, 52.4 wt%; MgO, 5.7 wt%), which could indicate the existence of more primitive melts than erupted bulk rock. The major element compositions of the SMIs indicate that the SMI-recorded melt evolution process was mainly dominated by the fractional crystallization of olivine. According to laser ablation inductively coupled mass spectrometer analyses, the trace element compositions of the SMIs are similar to those of the host bulk rock and feature obvious enrichment in Pb and large-ion lithophile elements relative to high field strength elements, rare earth elements, and highly negative Nb and Ta anomalies. The low Ce/Pb ratios, high Pb contents, and trace element distribution patterns in the SMIs are related to contributions from subducted sedimentary components in the magma source. Based on the electron microprobe analyses, the chemical composition of the olivine suggests that the lithology of the basalt source may be pyroxenite. The basalts may have been generated by the partial melting of pyroxenite during interactions between mantle-wedge peridotite and Si-rich melts that were released from the subducted slab.
资助项目	National Key Basic Research Program of China[2013CB429700] ; National Natural Science Foundation of China[41325021] ; National Natural Science Foundation of China[41476044] ; National Natural Science Foundation of China[41706052] ; Special Fund for the Global Change and Air-Sea Interaction Project[GASI-GEOGE-02] ; International Partnership Program of Chinese Academy of Sciences[133137KYSB20170003] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA11030302] ; Special Fund for the Taishan Scholar Program of Shandong Province[ts201511061] ; Qingdao National Laboratory for Marine Science and Technology[2015ASTP-0S17] ; Qingdao National Laboratory for Marine Science and Technology[2015ASKJ03] ; Qingdao National Laboratory for Marine Science and Technology[2016ASKJ13] ; Innovative Talent Promotion Program[2012RA2191] ; Science and Technology Development Program of Shandong Province[2013GRC31502] ; National High Level Talent Special Support Program ; CAS/SAFEA International Partnership Program for Creative Research Teams ; Qingdao Collaborative Innovation Center of Marine Science and Technology
WOS研究方向	Geology
语种	英语
出版者	WILEY
WOS记录号	WOS:000450653800045
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/156187]
专题	海洋研究所_海洋地质与环境重点实验室
通讯作者	Zeng, Zhigang
作者单位	1.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao, Shandong, Peoples R China 2.Univ Chinese Acad Sci, Beijing, Peoples R China 3.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Mineral Resources, Qingdao, Shandong, Peoples R China 4.Qingdao Collaborat Innovat Ctr Marine Sci & Techn, Qingdao, Shandong, Peoples R China
推荐引用方式 GB/T 7714	Li, Xiaohui,Zeng, Zhigang,Wang, Xiaoyuan,et al. Petrogenesis of basalt from the middle Okinawa Trough: New insights from olivine-hosted melt inclusions[J]. GEOLOGICAL JOURNAL,2018,53(6):3129-3146.
APA	Li, Xiaohui.,Zeng, Zhigang.,Wang, Xiaoyuan.,Chen, Shuai.,Ma, Yao.,...&Chen, Zuxing.(2018).Petrogenesis of basalt from the middle Okinawa Trough: New insights from olivine-hosted melt inclusions.GEOLOGICAL JOURNAL,53(6),3129-3146.
MLA	Li, Xiaohui,et al."Petrogenesis of basalt from the middle Okinawa Trough: New insights from olivine-hosted melt inclusions".GEOLOGICAL JOURNAL 53.6(2018):3129-3146.