Assessment of P-wave anisotropy by means of velocity elipsoid

Title:

Assessment of P-wave anisotropy by means of velocity elipsoid

Creator:

Petružálek, Matěj, Vilhelm, Jan, Lokajíček, Tomáš, and Rudajev, Vladimír

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:b79094ba-beba-4183-8c42-9cd3c2eaa08e
uuid:b79094ba-beba-4183-8c42-9cd3c2eaa08e
issn:1214-9705

Subject:

Geologie. Meteorologie. Klimatologie, geodynamika, geodynamics, foliation, loading, ultrasound sounding, elastic wave velocity, anisotropy, 7, and 551

Type:

article, články, model:article, and TEXT

Format:

print, bez média, and svazek

Description:

A method for estimation of elastic wave velocity anisotropy based on ultrasonic sounding data during rock-sample loading was developed. The subject matter of the method is approximation of ultrasonic sounding data by triaxial velocity ellipsoid. The applicability of proposed method was verified on investigation of anisot ropic rock samples. Laboratory loading of migmatite samples was realized under various mutual orientations between acting force direction and rock foliation - perpendicular, parallel and under 45°. P-ve velocity of ultrasound waves was monitored by 8 sensors network. The velocity ellipsoid was computed and changes of sizes and waorientation its main axes during loading were analyzed for separate experiments with regard to loading level. It was found, that independently to mutual orientation between rock foliation and loading direction, the minimum velocity vector turns to perpendicular direction to final rupture plane and maximum velocity vector turns to the plane of final rupture., Matěj Petružálek, Jan Vilhelm, Tomáš Lokajíček and Vladimír Rudajev., and Obsahuje bibliografické odkazy

Language:

English

Rights:

http://creativecommons.org/licenses/by-nc-sa/4.0/
policy:public

Source:

Acta geodynamica et geomaterialia : | 2007 Volume:4 | Number:3 (147)

Harvested from:

CDK

Metadata only:

false