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Wave Velocity and Attenuation Characteristics of Gabbro at 100~300 ℃ and 0.5~4.0 GPa
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Zhi CHEN1, Jian-Guo DU1, Wen-Ge ZHOU2, Yong-Gang LIU2, Ying LI1
Chinese Journal of High Pressure Physics | 2009, 23(5) : 338 - 344
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Chinese Journal of High Pressure Physics | 2009, 23(5): 338-344
Wave Velocity and Attenuation Characteristics of Gabbro at 100~300 ℃ and 0.5~4.0 GPa
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Zhi CHEN1, Jian-Guo DU1, Wen-Ge ZHOU2, Yong-Gang LIU2, Ying LI1
Affiliations
  • 1.Institute of Earthquake Science, China Earthquake Administration, Beijing 100036, China
  • 2.Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China
Published: 2009-10-15
Outline
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The variations of the elastic properties of gabbro at 100~300 ℃ and 0.5~4.0 GPa and the seismogeological application of the experimental results are discussed based on the measured wave velocities (vP, vS) and quality factors (QP, QS) of the gabbro. The values of vP, vS, QP and QS increase in the pressure range from 0.5 to 4.0 GPa at the given temperatures, but decrease slightly when the temperature increase from 100 to 300 ℃ at the given pressures. The variations of velocities and quality factors may be mainly attributed to the compression of the gabbro sample, and the continuity and elasticity of the sample become better at 0.5~2.3 GPa. The gabbro sample almost becomes continuous elastic medium at 2.3~4.0 GPa, resulting in smaller change of elastic wave velocities and attenuation. The wave velocities and quality factors decrease with increasing temperature because of thermal expansion and density decrease of gabbro. The experimental results can be used to explain the observed geophysical phenomena that the quality factor are enhanced by stress aggregation in the lithosphere, the quality factors may be reduced by rock fracturation and local enrichment of hot fluids in the epicentral areas before and after earthquake occurrence.

high temperature and high pressure  /  gabbro  /  wave velocity  /  quality factor  /  earthquake
陈志, 杜建国, 周文戈, 刘永刚, 李营. 0.5~4.0 GPa、100~300 ℃条件下辉长岩弹性波速及衰减特征. 高压物理学报, 2009 , 23 (5) : 338 -344 .
Zhi CHEN, Jian-Guo DU, Wen-Ge ZHOU, Yong-Gang LIU, Ying LI. Wave Velocity and Attenuation Characteristics of Gabbro at 100~300 ℃ and 0.5~4.0 GPa[J]. Chinese Journal of High Pressure Physics, 2009 , 23 (5) : 338 -344 .
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Year 2009 volume 23 Issue 5
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  • Receive Date：2008-12-31
  • Online Date：2026-10-30
  • Published：2009-10-15
Article Data
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History
  • Received：2008-12-31
  • Revised：2009-02-20
Funding
Affiliations
    1.Institute of Earthquake Science, China Earthquake Administration, Beijing 100036, China
    2.Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China
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Citations
表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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