Počet záznamů: 1  

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

  1. 1.
    SYSNO ASEP0475899
    Druh ASEPJ - Článek v odborném periodiku
    Zařazení RIVJ - Článek v odborném periodiku
    Poddruh JČlánek ve WOS
    NázevEffect 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-WA43
    Poč.str.11 s.
    Forma vydáníTištěná - P
    Jazyk dok.eng - angličtina
    Země vyd.US - Spojené státy americké
    Klíč. slovaantigorite ; serpentinite ; P-wawe velocity
    Vědní obor RIVDB - Geologie a mineralogie
    Obor OECDGeology
    Vědní obor RIV – spolupráceGeofyzikální ústav - Geologie a mineralogie
    CEPGA13-13967S GA ČR - Grantová agentura ČR
    GA16-03950S GA ČR - Grantová agentura ČR
    GC16-19751J GA ČR - Grantová agentura ČR
    Institucionální podporaGLU-S - RVO:67985831 ; GFU-E - RVO:67985530
    UT WOS000408628900063
    EID SCOPUS85021686895
    DOI10.1190/GEO2017-0006.1
    AnotaceWe 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.
    PracovištěGeologický ústav
    KontaktJana Popelková, popelkova@gli.cas.cz, Sabina Janíčková, Tel.: 233 087 272
    Rok sběru2018
Počet záznamů: 1  

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