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Enhanced study of rock elastic anisotropy
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SYSNO ASEP 0473296 Druh ASEP C - Konferenční příspěvek (mezinárodní konf.) Zařazení RIV D - Článek ve sborníku Název Enhanced study of rock elastic anisotropy Tvůrce(i) Lokajíček, Tomáš (GLU-S) RID, SAI, ORCID
Svitek, Tomáš (GLU-S) SAI, RID
Wenk, H.-R. (US)Zdroj.dok. 50th US Rock Mechanics / Geomechanics Symposium 2016, 3. - Houston : American Rock Mechanics Association (ARMA), 2016 - ISBN 978-151082802-5 Rozsah stran s. 2492-2500 Poč.str. 9 s. Forma vydání Tištěná - P Akce US Rock Mechanics / Geomechanics Symposium /50./ Datum konání 26.06.2016 - 29.06.2016 Místo konání Houston Země US - Spojené státy americké Typ akce WRD Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova microstructure ; neutron diffraction ; rock mechanics ; rocks ; seismic waves ; shear waves ; spheres ; ultrasonic applications ; velocity ; velocity measurement Vědní obor RIV DC - Seismologie, vulkanologie a struktura Země Obor OECD Condensed matter physics (including formerly solid state physics, supercond.) CEP LH13102 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy Institucionální podpora GLU-S - RVO:67985831 EID SCOPUS 85010380113 Anotace We present a combined study of a classical rock sample from Val Malenco, Italy, by investigating the microstructure and texture with state-of-the art synchrotron X-ray, neutron diffraction methods and measuring ultrasonic velocities both with a multi anvil apparatus and a novel instrument to measure P and S velocities on spheres. Petrological properties were studied by thin section analysis. Both, synchrotron and neutron diffraction data were analyzed for preferred orientation with the Rietveld method. The program MAUD was used for texture analysis. Velocity measurements were done by classical measurements of P- and S-wave velocities using the pulse transmission technique at room temperature and pressures up to 600 MPa with a triaxial apparatus. There was also measured 3D velocity distribution of spherical samples by P- and S-wave ultrasonic sounding. Determination of P, S1 (fast) and S2 (slow) wave velocities enables to calculate a full stiffness tensor. The crack distribution from non-linear approximation of P-wave measurements on sphere was determined. From quantitative texture measurements, elastic properties are modelled by self-consistent averaging. Comparison of experimental and model Cii parameters is done based on microstructures. Both, results from diffraction methods and velocity measurements are compared. Good agreement between the velocity and microstructural models is observed. Pracoviště Geologický ústav Kontakt Jana Popelková, popelkova@gli.cas.cz, Sabina Janíčková, Tel.: 233 087 272 Rok sběru 2017
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