DOI: 10.1016/j.epsl.2018.06.021
Scopus记录号: 2-s2.0-85049102084
论文题名: Seismically invisible water in Earth's transition zone?
作者: Schulze K. ; Marquardt H. ; Kawazoe T. ; Boffa Ballaran T. ; McCammon C. ; Koch-Müller M. ; Kurnosov A. ; Marquardt K.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2018
卷: 498 起始页码: 9
结束页码: 16
语种: 英语
英文关键词: Brillouin spectroscopy
; elasticity
; high-pressure
; hydration
; ringwoodite
; transition zone
Scopus关键词: Crystal structure
; Elasticity
; Hydration
; Seismic waves
; Seismology
; Single crystals
; Brillouin spectroscopy
; Deep water cycles
; Effect of pressure
; Elastic wave velocity
; High pressure
; Ringwoodite
; Seismic velocities
; Transition zones
; Reservoirs (water)
英文摘要: Ringwoodite, the dominant mineral at depths between 520 km and 660 km, can store up to 2–3 wt.% of water in its crystal structure, making the Earth's transition zone a plausible water reservoir that plays a central role in Earth's deep water cycle. Experiments show that hydration of ringwoodite significantly reduces elastic wave velocities at room pressure, but the effect of pressure remains poorly constrained. Here, a novel experimental setup enables a direct quantification of the effect of hydration on ringwoodite single-crystal elasticity and density at pressures of the Earth's transition zone and high temperatures. Our data show that the hydration-induced reduction of seismic velocities almost vanishes at conditions of the transition zone. Seismic data thus agree with a wide range of water contents in the transition zone. © 2018 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109733
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: Bayerisches Geoinstitut BGI, University of Bayreuth, Bayreuth, 95440, Germany; Department of Earth Sciences, University of Oxford, Oxford, OX1 3AN, United Kingdom; Department of Earth and Planetary Systems Sciences, Hiroshima University, Higashi-Hiroshima, 739-8526, Japan; German Research Center for Geosciences GFZ, Potsdam, 14473, Germany
Recommended Citation:
Schulze K.,Marquardt H.,Kawazoe T.,et al. Seismically invisible water in Earth's transition zone?[J]. Earth and Planetary Science Letters,2018-01-01,498