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Ultrasonic P Wave Velocity and Attenuation in Pyroxenite Under 3.0 GPa up to 1170°C |
| LIU Wei1;DU Jian-Guo1;BAI Li-Ping1;ZHOU Wen-Ge2;GUO Jie2 |
| 1Center for Analysis and Prediction, China Seismological Bureau, Beijing 100036
2Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002 |
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| Cite this article: |
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LIU Wei, DU Jian-Guo, BAI Li-Ping et al 2003 Chin. Phys. Lett. 20 164-166 |
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Abstract Ultrasonic P wave velocity (VP) and quality factor (QP value, on behalf of attenuation) in pyroxenite were presented as functions of pressures (0.3-3.0 GPa) and temperatures (20-1170°C). The experimental results show that VP and QP depend upon pressure and temperature. VP and QP in pyroxenite increase more rapidly at the pressure 0.3-1.4 GPa than those at 1.4-3.0 GPa. As the temperature rising from 20°C to about 1170°C at the pressure 3.0 GPa, an almost linear decrease up to 11% in VP was observed, and QP drops from 243 at room temperature to 68 at 1170°C with the decrease of 72 %. The experimental data indicate that the pressure and temperature induced fabric changes and frictional sliding and dislocation in pyroxenite play a key role in wave propagation in rocks.
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| Keywords:
91.60.-x
62.50.+p
43.35.Cg
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Published: 01 January 2003
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| PACS: |
91.60.-x
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(Physical properties of rocks and minerals)
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62.50.+p
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43.35.Cg
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(Ultrasonic velocity, dispersion, scattering, diffraction, and Attenuation in solids; elastic constants)
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