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
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
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.
(Ultrasonic velocity, dispersion, scattering, diffraction, and Attenuation in solids; elastic constants)
引用本文:
LIU Wei;DU Jian-Guo;BAI Li-Ping;ZHOU Wen-Ge;GUO Jie. Ultrasonic P Wave Velocity and Attenuation in Pyroxenite Under 3.0 GPa up to 1170°C[J]. 中国物理快报, 2003, 20(1): 164-166.
LIU Wei, DU Jian-Guo, BAI Li-Ping, ZHOU Wen-Ge, GUO Jie. Ultrasonic P Wave Velocity and Attenuation in Pyroxenite Under 3.0 GPa up to 1170°C. Chin. Phys. Lett., 2003, 20(1): 164-166.
2003, Vol. 20 
