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Fracture properties from seismic data - a numerical investigation.

Aoife Toomey, Christopher J. Bean, Oona Scotti GEOPHYSICAL RESEARCH LETTERS, VOL. 29, N° 4, 10. 1029/2001GLO 13867, 28 février 2002

Document type > *Article de revue

Keywords > earthquakes, earthquakes, rift/fault

Research Unit > IRSN/DEI/SARG/BERSSIN

Authors > SCOTTI Oona

Publication Date > 01/03/2002

Summary

In the upper 5 - 10 km of the crust fractures may remain partially open, exerting a strong influence over the response of their host material to seismic waves due to their superior deformability. This raises the possibility of using seismic data to determine not only the location but also the properties of fracture networks. We present a particle-based numerical scheme for modeling rock deformation and wave propagation and show that it accurately captures wave propagation across fractures. We investigate the effect of fracture tensile properties (i.e. fracture cohesion) on the wavefield and demonstrate that seismic data can, in theory, be used to distinguish fracture tensile and compressional properties. INDEX TERMS: 5102 Physical Properties of Rocks: Acoustic propertics; 5104 Physical Properties of Rocks: Fracture and flow.

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