Zobrazeno 1 - 10
of 23
pro vyhledávání: '"Emmanuel C. David"'
Publikováno v:
Geophysical Research Letters, Vol 46, Iss 4, Pp 1993-2002 (2019)
Abstract Laboratory measurements of seismic moduli and attenuation in antigorite serpentinite at a confining pressure of 200 MPa and temperatures up to 550 °C provide new results relevant to the interpretation of geophysical data in subduction zones
Externí odkaz:
https://doaj.org/article/6a3656bf492d451fb960ea4caa907235
Seismic-frequency torsional forced-oscillation measurements of shear modulus dispersion and associated strain-energy dissipation under conditions of simultaneously high temperature and pressure in ...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1b54d60d9bf5939861db30c42647fc1d
https://doi.org/10.1002/essoar.10506707.1
https://doi.org/10.1002/essoar.10506707.1
Publikováno v:
Geophysical Research Letters. 46:7337-7344
The energy released during earthquake rupture is partly radiated as seismic waves and mostly dissipated by frictional heating on the fault interface and by off‐fault fracturing of surrounding host rock. Quantification of these individual components
Autor:
Emmanuel C. David, Nicolas Brantut
High Vp/Vs ratio is a commonly used diagnostic for elevated fluid pressure when interpreting seismological data. The physical basis for this interpretation comes from rock physical data and models of isotropic, cracked rocks. Here, we establish preci
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5586d06442c074915978ad093b1dffad
https://doi.org/10.5194/egusphere-egu2020-18243
https://doi.org/10.5194/egusphere-egu2020-18243
Autor:
Ian Jackson, Emmanuel C. David
Publikováno v:
Materials Science and Engineering: A. 730:425-437
New measurements of dynamic shear and Young's moduli and their associated internal frictions were made with torsional and flexural forced-oscillation methods, respectively, on three polycrystalline specimens of pure copper. The tests spanned the 1–
Autor:
Timothy J. Kneafsey, Ian Jackson, Seiji Nakagawa, Emmanuel C. David, Yang Li, Douglas R. Schmitt
Publikováno v:
Journal of Geophysical Research: Solid Earth. 123:3501-3538
Author(s): Li, Y; David, EC; Nakagawa, S; Kneafsey, TJ; Schmitt, DR; Jackson, I | Abstract: For better understanding of frequency dependence (dispersion) of seismic wave velocities caused by stress-induced fluid flow, broadband laboratory measurement
Publikováno v:
Earth and Planetary Science Letters. 452:227-237
Experiments were conducted with hydrous olivine to investigate the defect responsible for the influence of water (hydrogen structurally incorporated as hydroxyl) on the olivine rheology. Solution–gelation derived Fo 90 olivine doped with nominally
Publikováno v:
ASEG Extended Abstracts. 2015:1-4
To better understand the dispersion of seismic velocities arising from stress-induced fluid flow, broadband laboratory measurements have been conducted on a range of synthetic samples. Forced oscil...
Publikováno v:
Nature. 555(7696)
Lateral variations of seismic wave speeds and attenuation (dissipation of strain energy) in the Earth's upper mantle have the potential to map key characteristics such as temperature, major-element composition, melt fraction and water content. The in
Publikováno v:
The Leading Edge. 33:624-632
In the field, the seismic waves used for active-source imaging typically contain frequencies from 10 to about 100 Hz, with corresponding wavelengths of tens of meters. This contrasts greatly with the ultrasonic (∼ 1-MHz) wave-speed measurements car