Enhanced study of rock elastic anisotropy

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985831%3A_____%2F16%3A00473296" target="_blank" >RIV/67985831:_____/16:00473296 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Enhanced study of rock elastic anisotropy

Original language description

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.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

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OECD FORD branch

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Project

<a href="/en/project/LH13102" target="_blank" >LH13102: Kinematic and dynamic anisotropy of sedimentary and crystalline rocks: Ultrasonic, synchrotron and neutron diffraction study</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2016

Confidentiality

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

Article name in the collection

50th US Rock Mechanics / Geomechanics Symposium 2016

ISBN

978-151082802-5

ISSN

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e-ISSN

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Number of pages

9

Pages from-to

2492-2500

Publisher name

American Rock Mechanics Association (ARMA)

Place of publication

Houston

Event location

Houston

Event date

Jun 26, 2016

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

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