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Experimentally Determined P-Wave Velocity Anisotropy for Rocks Related to the Western Bohemia Seismoactive Region |
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| Authors: | Martínková Marta Pros Zdeněk Klíma Karel Lokají?ek Tomá? Kotková Jana |
| Institution: | (1) Geophysical Institute, Academy of Sciences of the Czech Republic, Bo ní II, 141 31 Prague 4, Czech Republic;(2) Geophysical Institute, Academy of Sciences of the Czech Republic, Boní II, 141 31 Prague 4, Czech Republic;(3) Institute of Rock Structure and Mechanics, Academy of Sciences of the Czech Republic, V Hole ovikách 41, 182 09 Prague 8, Czech Republic;(4) Czech Geological Survey, Klárov 3, Prague 1, Czech Republic |
| Abstract: | The elastic properties of granites from Western Bohemia which we measured and published earlier have been supplemented with measurements of olivine nephelinite from the same region and with data on lherzolitic xenolith from the vicinity of  elezný Brod. The set of velocities measured under laboratory conditions has been compared with depth profiles suggested for the purpose of locating seismic swarm events which occur in this region. P-wave velocities were measured under pressures of up to 400 MPa. This pressure corresponds to depths of about 15 km for this region. The data were extrapolated for larger depths. Comparing laboratory measurements and seismic profiles, we can conclude that the rocks under study may be constituents of crust structures. |
| Keywords: | Bohemian Massif P-wave velocity measurements elastic anisotropy mantle xenoliths confining pressure nephelinite |
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