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- W863177268 abstract "Compressional and shear wave velocities (Vp and Vs) and densities have been measured for serpentinite, amphibolite, amphibole and biotite schist, and gneiss from western part of Chungnam Province at room temperature. Ranges of the density are 2.62.86g/cm for serpentinite, 2.252.81g/cm for talc, and 2.743.07g/cm for metamorphic rocks. Of these rocks, talc shows wider ranges than serpentinite and amphibolites due to its metamorphic process from serpentinite. Values of Vp and Vs are 57196062m/s and 28983351m/s for serpentinites, 40195478m/s and 2241/2976m/s for talc, 53756372m/s and 30423625m/s for amphibolite, 52905499m/s and 29683137m/s for schist, and 4788m/s and 2804m/s for gneiss, respectively. Velocity of P wave increases 1.47 times faster than S wave with increase of density. The results of seismic velocity measurement show anisotropy, higher velocity across than along the schistocity of rocks, especially in metamorphic rocks. This fact indicates that there were regional metamorphism related with tectonic forces. Values of seismic velocity increase with increasing pressure from 20 MPa to 70 MPa, especially in metamorphic rocks. Overall recalculated Vp and Vs values suggest that the serpentinite indicates for upper mantle in the respects of seismic characteristics, in spite of high degree of serpentinization. In addition, those of the amphibolite do for low crust, and gneiss and schist for upper crust." @default.
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- W863177268 date "2000-01-01" @default.
- W863177268 modified "2023-09-27" @default.
- W863177268 title "Geophysical Study on the Ultramafic Rocks of Chungnam Province, Korea: Characteristics of Seismic Velocity" @default.
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