中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
首页 机构 成果 学者
  
  1. CAS IR Grid
  2. 广州地球化学研究所
  3. 中国科学院广州地球化学研究所
  4. 同位素地球化学国家重点实验室
Absence of water content contrast between lithosphere and asthenosphere in subduction zone

文献类型：期刊论文

作者Sato, Yuto4,5; Takahashi, Eiichi4,5; Xing, Chang-Ming3; Li, Li4,5; Cui, Ze-Xian4,5; Zhang, Wan-Feng1,2,4,5; Xia, Xiao-Ping1,2,4,5
刊名EARTH AND PLANETARY SCIENCE LETTERS
出版日期2023
卷号603页码:117981
关键词UPPER-MANTLE HYDROGEN CONCENTRATION PERIDOTITE XENOLITHS ICHINOMEGATA CRATER UPPERMOST MANTLE ORTHO-PYROXENE OGA PENINSULA TRACE-ELEMENT H DIFFUSION PETROLOGY
ISSN号0012-821X
DOI10.1016/j.epsl.2022.117981
英文摘要The distribution of water between the rigid lithosphere and ductile asthenosphere is crucial for our understanding of the Earth's dynamics because it has been proposed that the origin of the lithosphere–asthenosphere boundary (LAB; i.e., the bottom of the tectonic plate) is related to a possible elevated water content in the asthenosphere. However, obtaining the depth profile of water content using mantle xenoliths is still challenging because of the rapid diffusive loss of hydrogen during magma ascent and eruption. In this study, we present diffusion profiles of water determined by FTIR mapping and SIMS line analysis for olivine and orthopyroxene of peridotite xenoliths from Ichinomegata maar in Northeast Japan. Extensive analysis of water contents in 17 xenolith samples revealed that these xenoliths exhibit a variety of zoning patterns, from which the timescale of diffusive loss was estimated. The xenoliths from Ichinomegata underwent only limited diffusive water loss (2O, respectively, which are similar to those in the top of the asthenosphere (depth range in 39–52 km) that contain 20 ± 2, 258 ± 38, and 561 ± 80 wt. ppm H2O. In the region which has experienced local metasomatism, higher water contents are recorded (30 ± 4, 414 ± 48, and 741 ± 43 wt. ppm H2O). This study verifies that there is no water content contrast across the LAB in our studied area. Therefore, we support the ‘partial-melting model’ for the origin of the LAB rather than the ‘olivine-water model’ in the western Pacific Plate subduction zone. ? 2023 Elsevier B.V.
WOS研究方向Geochemistry & Geophysics
语种英语
WOS记录号WOS:000961254700001
源URL[http://ir.gig.ac.cn/handle/344008/80294]  
专题同位素地球化学国家重点实验室
中国科学院矿物学与成矿学重点实验室
作者单位1.College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing; 100049, China
2.Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou; 511458, China
3.Key Laboratory of Mineralogy and Metallogeny, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou; 510460, China
4.CAS Center for Excellence in Deep Earth Science, Guangzhou; 510640, China
5.State Key Laboratory of Isotope Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou; 510640, China
推荐引用方式
GB/T 7714		 Sato, Yuto,Takahashi, Eiichi,Xing, Chang-Ming,et al. Absence of water content contrast between lithosphere and asthenosphere in subduction zone[J]. EARTH AND PLANETARY SCIENCE LETTERS,2023,603:117981.
APA Sato, Yuto.,Takahashi, Eiichi.,Xing, Chang-Ming.,Li, Li.,Cui, Ze-Xian.,...&Xia, Xiao-Ping.(2023).Absence of water content contrast between lithosphere and asthenosphere in subduction zone.EARTH AND PLANETARY SCIENCE LETTERS,603,117981.
MLA Sato, Yuto,et al."Absence of water content contrast between lithosphere and asthenosphere in subduction zone".EARTH AND PLANETARY SCIENCE LETTERS 603(2023):117981.

入库方式： OAI收割

来源：广州地球化学研究所

浏览0
下载0
收藏0
其他版本

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。