globalchange  > 气候变化与战略
DOI: 10.1016/j.tecto.2019.228309
论文题名:
Pore fluid effects on elastic wave velocities of serpentinite and implications for estimates of serpentinization in oceanic lithosphere
作者: Hatakeyama K.; Katayama I.
刊名: Tectonophysics
ISSN: 00401951
出版年: 2020
卷: 775
语种: 英语
中文关键词: Elastic wave velocity ; Mantle hydration ; Outer-rise region ; Porosity ; Serpentinite
英文关键词: Acoustic wave velocity ; Hydration ; Porosity ; Seismic waves ; Seismology ; Structural geology ; Temperature ; Wave propagation ; Elastic wave velocity ; Geophysical observations ; Oceanic lithosphere ; Outer-rise region ; Seismic refraction survey ; Seismic velocities ; Serpentinite ; Water infiltration ; Magnesite ; elastic wave ; hydration ; oceanic lithosphere ; porosity ; seismic refraction ; seismic wave ; serpentinite ; serpentinization ; wave velocity
英文摘要: Recent seismic refraction surveys at various outer-rise regions have identified low seismic velocities in the uppermost mantle, which is indicative of mantle hydration (serpentinization) related to water infiltration along bending-related faults prior to subduction. Serpentinization could lead to the development of pore spaces during hydration reaction, which influences seismic velocity. Here, we measured the elastic wave velocity of low-temperature serpentinites with various porosities and reevaluated the degree of serpentinization of the oceanic mantle in outer-rise regions, accounting for pore fluid effects. Experimental results show that the elastic wave velocity of serpentinite decreases with increasing porosity. This relationship indicates that the estimated degree of serpentinization decreases with increasing serpentinite porosity. We then applied these experimental data to the geophysical observations of the outer-rise regions to reevaluate the amount and the type of water carried into Earth's interior at subduction systems. © 2019 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/170600
Appears in Collections:气候变化与战略

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作者单位: Department of Earth and Planetary Systems Science, Hiroshima University, Higashi-Hiroshima, 739-8526, Japan

Recommended Citation:
Hatakeyama K.,Katayama I.. Pore fluid effects on elastic wave velocities of serpentinite and implications for estimates of serpentinization in oceanic lithosphere[J]. Tectonophysics,2020-01-01,775
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