Geochemical and Sr?Nd isotopic constraints on the origin of volcanic rocks from the northern Okinawa Trough

doi:10.1002/gj.3332

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

	Geochemical and Sr?Nd isotopic constraints on the origin of volcanic rocks from the northern Okinawa Trough
	Shu, Yunchao 2,3; Zeng, Zhigang 1,2,3,4; Yin, Xuebo 2; Wang, Xiaoyuan 1,2; Chen, Shuai 1,2
刊名	GEOLOGICAL JOURNAL
	2019-11-01
卷号	54 期号:6 页码:3304-3313
关键词	back-arc basin Okinawa Trough petrogenesis volcanic rocks
ISSN号	0072-1050
DOI	10.1002/gj.3332
通讯作者	Zeng, Zhigang(zgzeng@qdio.ac.cn)
英文摘要	Okinawa Trough is an active back-arc basin behind the Ryukyu Arc in the western Pacific. We report the geochemical and isotopic (Sr, Nd) compositions of volcanic rocks, which are recovered as lavas and pumices, dredged from northern Okinawa Trough. The volcanic rocks are composed of basaltic andesite, andesite, dacite, and trachydacite. Both intermediate and felsic rocks are characterized by enrichments in large-ion lithophile elements (LILEs) and depletion in high-field strength elements (HFSEs). Three groups of volcanic rocks have been identified. Andesite D5-1 and trachydacite D10 display identical Sr and Nd isotopic ratios, together with strongly enriched in light-REE and incompatible elements, compared to previously published basalts from middle Okinawa Trough (MOT). Andesite D5-1 and trachydacite D10 are derived from basaltic magma modified by fractional crystallization. Andesites D5-2, D5-3, and D5-4 exhibit lower Sr-87/Sr-86 and higher Nd-143/Nd-144 ratios than MOT basalts, transitional REE patterns and trace element ratios between adakite rocks and MOT basalts. Features of these samples can be interpreted by further mixing of the interaction magma of mantle wedge and subducted-slab-melt, with evolved basaltic magma. Dacite D22, occurring as pumice, shows undistinguishable trace element, including REE, and Sr and Nd isotopic compositions with rhyolites from the southern Ryukyu volcanic front, which indicates that this pumice was not emplaced in situ and most likely drifted from southern Ryukyu volcanic front by Kuroshio Current.
资助项目	National Basic Research Program of China[2013CB429700] ; Qingdao National Laboratory for Marine Science and Technology[2015ASKJ03] ; Qingdao Collaborative Innovation Center of Marine Science and Technology ; CAS/SAFEA International Partnership Program for Creative Research Teams ; National High Level Talent Special Support Program ; Science and Technology Development Program of Shandong Province[2013GRC31502] ; Innovative Talent Promotion Program[2012RA2191] ; National Special Fund for the 13th Five Year Plan of COMRA[DY135-G2-1-02] ; Special Fund for the Taishan Scholar Program of Shandong Province[ts201511061] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA11030302] ; International Partnership Program of Chinese Academy of Sciences[133137KYSB20170003] ; National Key Basic Research Program of China[2013CB429700] ; National Programme on Global Change and Air-Sea Interaction[GASI-GEOGE-02] ; Scientific and Technological Innovation Project - Qingdao National Laboratory for Marine Science and Technology[2015ASKJ03] ; Aoshan Talent Program - Qingdao National Laboratory for Marine Science and Technology[2015ASTP-0S17]
WOS研究方向	Geology
语种	英语
出版者	WILEY
WOS记录号	WOS:000496020400008
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/165028]
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.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Mineral Resources, Qingdao, Shandong, Peoples R China 2.Chinese Acad Sci, Inst Oceanol, CAS Key Lab Marine Geol & Environm, Seafloor Hydrothermal Act Lab, Qingdao 266071, Shandong, Peoples R China 3.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing, Peoples R China 4.Chinese Acad Sci, Ctr Ocean Megasci, Qingdao, Shandong, Peoples R China
推荐引用方式 GB/T 7714	Shu, Yunchao,Zeng, Zhigang,Yin, Xuebo,et al. Geochemical and Sr?Nd isotopic constraints on the origin of volcanic rocks from the northern Okinawa Trough[J]. GEOLOGICAL JOURNAL,2019,54(6):3304-3313.
APA	Shu, Yunchao,Zeng, Zhigang,Yin, Xuebo,Wang, Xiaoyuan,&Chen, Shuai.(2019).Geochemical and Sr?Nd isotopic constraints on the origin of volcanic rocks from the northern Okinawa Trough.GEOLOGICAL JOURNAL,54(6),3304-3313.
MLA	Shu, Yunchao,et al."Geochemical and Sr?Nd isotopic constraints on the origin of volcanic rocks from the northern Okinawa Trough".GEOLOGICAL JOURNAL 54.6(2019):3304-3313.