Effect of pressure on 3D distribution of P-wave velocity and attenuation in antigorite serpentinite

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985530%3A_____%2F17%3A00475899" target="_blank" >RIV/67985530:_____/17:00475899 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/67985831:_____/17:00475899

Výsledek na webu

<a href="http://dx.doi.org/10.1190/GEO2017-0006.1" target="_blank" >http://dx.doi.org/10.1190/GEO2017-0006.1</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1190/GEO2017-0006.1" target="_blank" >10.1190/GEO2017-0006.1</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Effect of pressure on 3D distribution of P-wave velocity and attenuation in antigorite serpentinite

Popis výsledku v původním jazyce

We have developed a detailed study on the pressure dependence of P-wave velocities and amplitudes on a spherical sample of antigorite serpentinite from Val Malenco, Northern Italy. Measurements were done at room temperature and hydrostatic pressures up to 400 MPa in a pressure vessel with oil as a pressure medium. The transducer/sample assembly allows simultaneous velocity and amplitude measurements on the spherical sample in 132 independent directions.nThree significant directions of the foliated sample were selected to study changes of the directional dependence (anisotropy) of velocity, amplitude, and Q-factor with increasing pressure. Remarkable differences are observed between the changes of velocity and attenuation anisotropy as pressure is increased. Although the velocity anisotropy is quite stable through all pressure levels, the attenuation anisotropy and the Q-factor vary significantly in magnitude and orientation. The variations are probably caused by the closing of microcracks due to acting hydrostatic pressure, so the contact conditions between individual minerals consolidatenand the transmitting energy is less attenuating.

Název v anglickém jazyce

Effect of pressure on 3D distribution of P-wave velocity and attenuation in antigorite serpentinite

Popis výsledku anglicky

We have developed a detailed study on the pressure dependence of P-wave velocities and amplitudes on a spherical sample of antigorite serpentinite from Val Malenco, Northern Italy. Measurements were done at room temperature and hydrostatic pressures up to 400 MPa in a pressure vessel with oil as a pressure medium. The transducer/sample assembly allows simultaneous velocity and amplitude measurements on the spherical sample in 132 independent directions.nThree significant directions of the foliated sample were selected to study changes of the directional dependence (anisotropy) of velocity, amplitude, and Q-factor with increasing pressure. Remarkable differences are observed between the changes of velocity and attenuation anisotropy as pressure is increased. Although the velocity anisotropy is quite stable through all pressure levels, the attenuation anisotropy and the Q-factor vary significantly in magnitude and orientation. The variations are probably caused by the closing of microcracks due to acting hydrostatic pressure, so the contact conditions between individual minerals consolidatenand the transmitting energy is less attenuating.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10505 - Geology

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Geophysics

ISSN

0016-8033

e-ISSN

—

Svazek periodika

82

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

11

Strana od-do

"WA33"-"WA43"

Kód UT WoS článku

000408628900063

EID výsledku v databázi Scopus

2-s2.0-85021686895