Influence of melt viscosity of basaltic and andesitic composition on seismic attenuation in partially molten gabbronorite

Fabrice R. Fontaine; Daniel R. Neuville; Benoit Ildefonse; David Mainprice

doi:10.1016/j.pepi.2008.04.010

Influence of melt viscosity of basaltic and andesitic composition on seismic attenuation in partially molten gabbronorite

Fabrice R. Fontaine^*, Daniel R. Neuville, Benoit Ildefonse, David Mainprice

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

The characteristic frequencies at which two different melt-related attenuation mechanisms occur in partially molten gabbronorite are computed as a function of aspect ratios of the melt-filled cracks, and the melt viscosity. The computations were done for basaltic and andesitic melts. The melt viscosity is constrained by (i) laboratory measurements performed in the range 10⁸-10¹⁴ Pa s with a creep apparatus and in the range 10^-1 to 10⁵ Pa s with a rotational Couette viscometer, and (ii) modeling of viscosity at high temperatures. The results of the characteristic frequency calculations suggest that melt squirt flow is a viable attenuation mechanism at seismic frequencies for aspect ratio of melt inclusions in the range 10^-3 to 10^-2 for the andesite, and 10^-4 to 10^-3 for the two basalts.

Original language	English
Pages (from-to)	223-229
Number of pages	7
Journal	Physics of the Earth and Planetary Interiors
Volume	167
Issue number	3-4
DOIs	https://doi.org/10.1016/j.pepi.2008.04.010
Publication status	Published - Apr 2008

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10.1016/j.pepi.2008.04.010

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title = "Influence of melt viscosity of basaltic and andesitic composition on seismic attenuation in partially molten gabbronorite",

abstract = "The characteristic frequencies at which two different melt-related attenuation mechanisms occur in partially molten gabbronorite are computed as a function of aspect ratios of the melt-filled cracks, and the melt viscosity. The computations were done for basaltic and andesitic melts. The melt viscosity is constrained by (i) laboratory measurements performed in the range 108-1014 Pa s with a creep apparatus and in the range 10-1 to 105 Pa s with a rotational Couette viscometer, and (ii) modeling of viscosity at high temperatures. The results of the characteristic frequency calculations suggest that melt squirt flow is a viable attenuation mechanism at seismic frequencies for aspect ratio of melt inclusions in the range 10-3 to 10-2 for the andesite, and 10-4 to 10-3 for the two basalts.",

keywords = "Magma chamber, Melt, Seismic attenuation, Viscosity",

author = "Fontaine, {Fabrice R.} and Neuville, {Daniel R.} and Benoit Ildefonse and David Mainprice",

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doi = "10.1016/j.pepi.2008.04.010",

language = "English",

volume = "167",

pages = "223--229",

journal = "Physics of the Earth and Planetary Interiors",

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T1 - Influence of melt viscosity of basaltic and andesitic composition on seismic attenuation in partially molten gabbronorite

AU - Fontaine, Fabrice R.

AU - Neuville, Daniel R.

AU - Ildefonse, Benoit

AU - Mainprice, David

PY - 2008/4

Y1 - 2008/4

N2 - The characteristic frequencies at which two different melt-related attenuation mechanisms occur in partially molten gabbronorite are computed as a function of aspect ratios of the melt-filled cracks, and the melt viscosity. The computations were done for basaltic and andesitic melts. The melt viscosity is constrained by (i) laboratory measurements performed in the range 108-1014 Pa s with a creep apparatus and in the range 10-1 to 105 Pa s with a rotational Couette viscometer, and (ii) modeling of viscosity at high temperatures. The results of the characteristic frequency calculations suggest that melt squirt flow is a viable attenuation mechanism at seismic frequencies for aspect ratio of melt inclusions in the range 10-3 to 10-2 for the andesite, and 10-4 to 10-3 for the two basalts.

AB - The characteristic frequencies at which two different melt-related attenuation mechanisms occur in partially molten gabbronorite are computed as a function of aspect ratios of the melt-filled cracks, and the melt viscosity. The computations were done for basaltic and andesitic melts. The melt viscosity is constrained by (i) laboratory measurements performed in the range 108-1014 Pa s with a creep apparatus and in the range 10-1 to 105 Pa s with a rotational Couette viscometer, and (ii) modeling of viscosity at high temperatures. The results of the characteristic frequency calculations suggest that melt squirt flow is a viable attenuation mechanism at seismic frequencies for aspect ratio of melt inclusions in the range 10-3 to 10-2 for the andesite, and 10-4 to 10-3 for the two basalts.

KW - Magma chamber

KW - Melt

KW - Seismic attenuation

KW - Viscosity

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U2 - 10.1016/j.pepi.2008.04.010

DO - 10.1016/j.pepi.2008.04.010

M3 - Article

SN - 0031-9201

VL - 167

SP - 223

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JO - Physics of the Earth and Planetary Interiors

JF - Physics of the Earth and Planetary Interiors

IS - 3-4

ER -

Influence of melt viscosity of basaltic and andesitic composition on seismic attenuation in partially molten gabbronorite

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