Ullemeyer, K. and Popp, T. (2004) Evaluation of the elastic moduli from combined spherical and triaxial experimental data: Application to a gneiss sample. Geophysical Research Letters, 31 (11). DOI L1160710.1029/2004gl020027.

Abstract

P-wave velocity measurements on spherical sample (P-conf less than or equal to 200 MPa; T = 20degreesC) and P- and S-wave velocity measurements on cube (P-conf less than or equal to 612 MPa; T less than or equal to 600degreesC) were carried out. It will be demonstrated that combination of both these data sets increases the accuracy in the determination of the elastic moduli of a sample. The elastic moduli can be calculated to maximum confining pressure, although the data for P-conf > 200 MPa are restricted to three orthogonal directions. Even extrapolation of the data beyond the measuring range appears to be possible, if reliability of the relation used for extrapolation can be ensured.

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