Original Articles |
|
|
|
|
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 |
|
Cite this article: |
LIU Wei, DU Jian-Guo, BAI Li-Ping et al 2003 Chin. Phys. Lett. 20 164-166 |
|
|
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.
|
Keywords:
91.60.-x
62.50.+p
43.35.Cg
|
|
Published: 01 January 2003
|
|
PACS: |
91.60.-x
|
(Physical properties of rocks and minerals)
|
|
62.50.+p
|
|
|
43.35.Cg
|
(Ultrasonic velocity, dispersion, scattering, diffraction, and Attenuation in solids; elastic constants)
|
|
|
|
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|