Elastic anisotropy and pore space geometry of schlieren granite: direct 3-D measurements at high confining pressure combined with microfabric analysis

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F13%3A10139482" target="_blank" >RIV/00216208:11310/13:10139482 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/67985530:_____/13:00397236 RIV/00216224:14310/13:00072499

Výsledek na webu

<a href="http://dx.doi.org/10.1093/gji/ggt053" target="_blank" >http://dx.doi.org/10.1093/gji/ggt053</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1093/gji/ggt053" target="_blank" >10.1093/gji/ggt053</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Elastic anisotropy and pore space geometry of schlieren granite: direct 3-D measurements at high confining pressure combined with microfabric analysis

Popis výsledku v původním jazyce

Pore space geometry of granitic rocks and its evolution with depth are key factors in large-scale seismics or in projects of enhanced geothermal systems or of deep hazardous waste repositories. In this study, we studied macroscopically anisotropic schlieren-bearing granite by experimental P-wave velocity (V-P) measurements on spherical sample in 132 directions at seven different confining pressures in the range 0.1-400 MPa. In order to discriminate the phenomena affecting the rock elastic properties weanalysed the orientation of microcracks and of grain boundaries and we measured the anisotropy of magnetic susceptibility of the rock. Three sets of microcracks were defined, with two of them linked to the massif exfoliation process and one to cooling contraction of the massif. During pressurization the measured mean V-P and V-P anisotropy degree at ambient pressure and at highest confinement (400 MPa) yielded 3.3 km s(-1) and 24 per cent, and 6.2 km s(-1) and 3 per cent, respectively. T

Název v anglickém jazyce

Elastic anisotropy and pore space geometry of schlieren granite: direct 3-D measurements at high confining pressure combined with microfabric analysis

Popis výsledku anglicky

Pore space geometry of granitic rocks and its evolution with depth are key factors in large-scale seismics or in projects of enhanced geothermal systems or of deep hazardous waste repositories. In this study, we studied macroscopically anisotropic schlieren-bearing granite by experimental P-wave velocity (V-P) measurements on spherical sample in 132 directions at seven different confining pressures in the range 0.1-400 MPa. In order to discriminate the phenomena affecting the rock elastic properties weanalysed the orientation of microcracks and of grain boundaries and we measured the anisotropy of magnetic susceptibility of the rock. Three sets of microcracks were defined, with two of them linked to the massif exfoliation process and one to cooling contraction of the massif. During pressurization the measured mean V-P and V-P anisotropy degree at ambient pressure and at highest confinement (400 MPa) yielded 3.3 km s(-1) and 24 per cent, and 6.2 km s(-1) and 3 per cent, respectively. T

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

DB - Geologie a mineralogie

OECD FORD obor

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Projekt

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Návaznosti

S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2013

Kód důvěrnosti údajů

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

Název periodika

Geophysical Journal International

ISSN

0956-540X

e-ISSN

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Svazek periodika

194

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

12

Strana od-do

383-394

Kód UT WoS článku

000320462300027

EID výsledku v databázi Scopus

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