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《Chinese Journal of Geophysics》 1995-02
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THE EXPERIMENTAL STUDY OF P-WAVE VELOCITY ANISOTROPY OF MYLONITE AND IT'S SURROUNDING ROCKS PROM DUCTILE SHEAR ZONES OF NORTH-CHINA AT ELEVATED PRESSURES AND TEMPERATURES

Mu RUM-CHANG;GAO PING;LIU RUO-XIN; MA BAO-LIN (Institute of Geology,State Seismolgical Bereau,Beijing 100029)  
We have undertaken an experinental study of compressional-wave velocity and It's anisotropy of mylonite and it's surrounding rocks from North-China at high pressure and temperature.The laboratory results indicate that;1.The Vp Within the foliation plane of mylonite is 0.15 0.30km/s.more than the Vp parallel to the normal of the foliation.Vp anisotropy is 3%-5%.2.The P-wave velocity of mylonite is 0.15-0.45km/s lower than the P-wave velocity of it's surrounding rocks. 3.The velocity anisotropy of amphibolite fades mylonite is more than the anisotropy of greenschist and granulite fades mylonite.4.The anisotropyls clearlyrelated to the mylonite fabric.The lattic prefferred orientation has effect on the seismic velocity anisotropy.
【Fund】: 国家自然科学基金
【CateGory Index】: P584
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