DOI: 10.1002/2015GL065018
论文题名: Mantle-driven uplift of Hangai Dome: New seismic constraints from adjoint tomography
作者: Chen M. ; Niu F. ; Liu Q. ; Tromp J.
刊名: Geophysical Research Letters
ISSN: 0094-9138
EISSN: 1944-8869
出版年: 2015
卷: 42, 期: 17 起始页码: 6967
结束页码: 6974
语种: 英语
英文关键词: adjoint tomography
; decompression melting
; Hangai Dome
; isostasy
; mantle upwelling
; partial melt
Scopus关键词: Melting
; Seismology
; Shear flow
; Shear waves
; Structural geology
; Tomography
; Waveform analysis
; Adjoints
; Decompression melting
; isostasy
; Mantle upwellings
; Partial melt
; Domes
; anisotropy
; data set
; decompression
; dome
; elevation
; isostasy
; lithosphere
; melting
; S-wave
; tomography
; uplift
; upper mantle
; upwelling
; waveform analysis
; wind shear
; Far East
; Mongolia
英文摘要: The origin of Hangai Dome, an unusual large-scale, high-elevation low-relief landform in central Mongolia, remains enigmatic partly due to lack of constraints on its underlying seismic structure. Using adjoint tomography - a full waveform tomographic technique - and a large seismic waveform data set in East Asia, we discover beneath the dome a deep low shear wave speed (low-V) conduit indicating a slightly warmer (54 K to 127 K) upwelling from the transition zone. This upwelling is spatially linked to a broader uppermost mantle low-V region underlying the dome. Further observations of high compressional to shear wave speed ratios and positive radial anisotropy in the low-V region suggest partial melting and horizontal melt transport. We propose that the mantle upwelling induced decompression melting in the uppermost mantle and that excess heat associated with melt transport modified the lithosphere that isostatically compensates the surface uplift at upper mantle depths (>80 km). ©2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84943311568&doi=10.1002%2f2015GL065018&partnerID=40&md5=7611a51eb284362e9c6c014b89a5fa92
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8754
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: Department of Earth Science, Rice University, Houston, TX, United States
Recommended Citation:
Chen M.,Niu F.,Liu Q.,et al. Mantle-driven uplift of Hangai Dome: New seismic constraints from adjoint tomography[J]. Geophysical Research Letters,2015-01-01,42(17).