DOI: 10.1002/2015GL063308
论文题名: Temperature and melt fraction distributions in a mantle wedge determined from the electrical conductivity structure: Application to one nonvolcanic and two volcanic regions in the Kyushu subduction zone, Japan
作者: Hata M. ; Uyeshima M.
刊名: Geophysical Research Letters
ISSN: 0094-8727
EISSN: 1944-8458
出版年: 2015
卷: 42, 期: 8 起始页码: 2709
结束页码: 2717
语种: 英语
英文关键词: electrical conductivity structure
; melt fraction
; nominally anhydrous minerals
; thermal structure
Scopus关键词: Silicate minerals
; Volcanoes
; Electrical conductivity
; Geophysical observations
; Hashin-shtrikman
; Melt fraction
; Nominally anhydrous minerals
; Subduction zones
; Thermal structure
; Volcanic region
; Electric conductivity
; electrical conductivity
; geophysical method
; rock property
; subduction zone
; upper mantle
; Japan
英文摘要: We propose a new method for estimating the temperatures and melt fractions of the upper mantle. Our method is based on connecting the electrical conductivity structure from geophysical observations with laboratory-determined relationships between the electrical conductivity and temperature of four nominally anhydrous minerals (olivine, orthopyroxene, clinopyroxene, and garnet) and basaltic melt. The temperatures are expressed as the upper limit temperatures using the Hashin-Shtrikman lower bound in solid phases and using the Hashin-Shtrikman upper bound in solid-liquid mixed phases. We apply the method to a nonvolcanic and two volcanic regions in the Kyushu subduction zone, southwest Japan. Our results suggest that the temperatures of the upper mantle are 1100-1450°C for dry mantle and 900-1350°C for wet mantle and that the melt fractions of the upper mantle are <20% beneath the two volcanic regions and <5% beneath the nonvolcanic region for both dry and wet mantle. ©2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84929501672&doi=10.1002%2f2015GL063308&partnerID=40&md5=31ce9622b060cf03bbf97f13719a6cb6
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8343
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Earthquake Research Institute, University of Tokyo, Tokyo, Japan
Recommended Citation:
Hata M.,Uyeshima M.. Temperature and melt fraction distributions in a mantle wedge determined from the electrical conductivity structure: Application to one nonvolcanic and two volcanic regions in the Kyushu subduction zone, Japan[J]. Geophysical Research Letters,2015-01-01,42(8).