DOI: 10.1016/j.epsl.2018.02.007
Scopus记录号: 2-s2.0-85044267752
论文题名: Evidence for fluid and melt generation in response to an asthenospheric upwelling beneath the Hangai Dome, Mongolia
作者: Comeau M.J. ; Käufl J.S. ; Becken M. ; Kuvshinov A. ; Grayver A.V. ; Kamm J. ; Demberel S. ; Sukhbaatar U. ; Batmagnai E.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2018
卷: 487 起始页码: 201
结束页码: 209
语种: 英语
英文关键词: electrical resistivity
; Hangai
; intraplate volcanism
; magnetotellurics
; Mongolia
; partial melt
Scopus关键词: Electric conductivity
; Lithology
; Magnetotellurics
; Crustal boundaries
; Geophysical data
; Hangai
; intraplate volcanism
; Magnetotelluric data
; Mongolia
; Partial melt
; Subsurface structures
; Domes
; asthenosphere
; crustal structure
; electrical resistivity
; fluid inclusion
; intraplate process
; magnetotelluric method
; melt inclusion
; plateau
; rheology
; uplift
; upper mantle
; volcanism
; Khangai Mountains
; Mongolia
英文摘要: The Hangai Dome, Mongolia, is an unusual high-elevation, intra-continental plateau characterized by dispersed, low-volume, intraplate volcanism. Its subsurface structure and its origin remains unexplained, due in part to a lack of high-resolution geophysical data. Magnetotelluric data along a ∼610 km profile crossing the Hangai Dome were used to generate electrical resistivity models of the crust and upper mantle. The crust is found to be unexpectedly heterogeneous. The upper crust is highly resistive but contains several features interpreted as ancient fluid pathways and fault zones, including the South Hangai fault system and ophiolite belt that is revealed to be a major crustal boundary. South of the Hangai Dome a clear transition in crustal properties is observed which reflects the rheological differences across accreted terranes. The lower crust contains discrete zones of low-resistivity material that indicate the presence of fluids and a weakened lower crust. The upper mantle contains a large low-resistivity zone that is consistent with the presence of partial melt within an asthenospheric upwelling, believed to be driving intraplate volcanism and supporting uplift. © 2018 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109999
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: Institut für Geophysik, Universität Münster, Correnstrasse 24, Münster, 48149, Germany; Institute of Geophysics, Swiss Federal Institute of Technology (ETH), Sonneggstrasse 5, Zürich, 8092, Switzerland; Institute of Astronomy & Geophysics, Mongolian Academy of Sciences, P.O.B-152, Ulaanbaatar, 13343, Mongolia
Recommended Citation:
Comeau M.J.,Käufl J.S.,Becken M.,et al. Evidence for fluid and melt generation in response to an asthenospheric upwelling beneath the Hangai Dome, Mongolia[J]. Earth and Planetary Science Letters,2018-01-01,487