Subduction contribution to the magma source of the Okinawa Trough-Evidence from boron isotopes

doi:10.1002/gj.3209

IOCAS-IR

	Subduction contribution to the magma source of the Okinawa Trough-Evidence from boron isotopes
	Zhang, Xia 1; Zhai, Shikui 1; Yu, Zenghui 1; Guo, Kun 2,3; Wang, Shujie 2
	2019
发表期刊	GEOLOGICAL JOURNAL
ISSN	0072-1050
卷号	54 期号:1 页码:605-613
通讯作者	Zhai, Shikui(zhai2000@ouc.edu.cn)
摘要	Boron (B) has been an excellent geochemical tracer for the investigation of magmatism in arcs and back-arc basins, due to its high fluid mobility and distinct isotope compositions in the mantle wedge and subducting slabs. In this study, B isotope compositions of the volcanic rocks collected from the northern, middle, and southern Okinawa Trough were determined to discuss the sources of B in the magma and assess the contribution of subduction components to the magma source. The results show that B in the volcanic rocks from the Okinawa Trough are mainly from the underlying mantle wedge but influenced by the fluids derived from the subducted slab. Compared with volcanic rocks from the middle Okinawa Trough, samples from the southern Okinawa Trough are generated from the source with larger proportion of subduction components. For the volcanic rocks from the northern Okinawa Trough, the influence of the subduction components is the most significant and the proportion of slab-derived B in the magma reaches up to 30%. It is estimated that the subduction components are composed of altered oceanic crust/serpentinite fluid and sediment fluid with the proportion of 94:6. The B-rich fluid, loaded by cold and fast dipping slab, released into overlying mantle wedge resulting in partial melting of mantle is the genetic mechanism of B-rich volcanic rocks in the Okinawa Trough.
关键词	boron isotope Okinawa Trough subduction components volcanic rocks
DOI	10.1002/gj.3209
收录类别	SCI
语种	英语
资助项目	National Key Basic Research Program of China[2013CB429702] ; Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology[MGQNLM-KF201707] ; National Key Basic Research Program of China[2013CB429702] ; Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology[MGQNLM-KF201707]
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000455038100039
出版者	WILEY
引用统计	被引频次：11[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/160683
专题	中国科学院海洋研究所
通讯作者	Zhai, Shikui
作者单位	1.Ocean Univ China, Coll Marine Geosci, Key Lab Submarine Geosci & Prospecting Tech, Minist Educ, Qingdao 266100, Peoples R China 2.Chinese Acad Sci, Inst Oceanol, Qingdao, Peoples R China 3.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Xia,Zhai, Shikui,Yu, Zenghui,et al. Subduction contribution to the magma source of the Okinawa Trough-Evidence from boron isotopes[J]. GEOLOGICAL JOURNAL,2019,54(1):605-613.
APA	Zhang, Xia,Zhai, Shikui,Yu, Zenghui,Guo, Kun,&Wang, Shujie.(2019).Subduction contribution to the magma source of the Okinawa Trough-Evidence from boron isotopes.GEOLOGICAL JOURNAL,54(1),605-613.
MLA	Zhang, Xia,et al."Subduction contribution to the magma source of the Okinawa Trough-Evidence from boron isotopes".GEOLOGICAL JOURNAL 54.1(2019):605-613.

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