Počet záznamů: 1
Effect of pressure on 3D distribution of P-wave velocity and attenuation in antigorite serpentinite
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SYSNO ASEP 0475899 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Effect of pressure on 3D distribution of P-wave velocity and attenuation in antigorite serpentinite Tvůrce(i) Svitek, Tomáš (GLU-S) SAI, RID
Vavryčuk, Václav (GFU-E) ORCID, RID
Lokajíček, Tomáš (GLU-S) RID, SAI, ORCID
Petružálek, Matěj (GLU-S) RID, SAI, ORCID
Kern, H. (DE)Zdroj.dok. Geophysics. - : Society of Exploration Geophysicists - ISSN 0016-8033
Roč. 82, č. 4 (2017), WA33-WA43Poč.str. 11 s. Forma vydání Tištěná - P Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova antigorite ; serpentinite ; P-wawe velocity Vědní obor RIV DB - Geologie a mineralogie Obor OECD Geology Vědní obor RIV – spolupráce Geofyzikální ústav - Geologie a mineralogie CEP GA13-13967S GA ČR - Grantová agentura ČR GA16-03950S GA ČR - Grantová agentura ČR GC16-19751J GA ČR - Grantová agentura ČR Institucionální podpora GLU-S - RVO:67985831 ; GFU-E - RVO:67985530 UT WOS 000408628900063 EID SCOPUS 85021686895 DOI 10.1190/GEO2017-0006.1 Anotace 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.
Three 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 consolidate
and the transmitting energy is less attenuating.Pracoviště Geologický ústav Kontakt Jana Popelková, popelkova@gli.cas.cz, Sabina Janíčková, Tel.: 233 087 272 Rok sběru 2018
Počet záznamů: 1