Chin. Phys. Lett.  2003, Vol. 20 Issue (1): 164-166    DOI:
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
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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.
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)  
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https://cpl.iphy.ac.cn/       OR      https://cpl.iphy.ac.cn/Y2003/V20/I1/0164
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