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对于四个为一组的基本上为单一性矿物质的方解石岩,在地震频段上测量了其切变模量G及有关的内耗Q~(-1),方解石的颗粒尺寸范围是4—1000μm。该测量建立在从前所描述过的用来观测在室温高围压条件下,由岩石柱和标准钢组成的系统的受迫扭转振荡的技术基础之上,研究了每块岩石的特性对压力(0—300MPa)、振荡周期(1—300s)和应变振幅(界面上的最大幅值10~(-8)-10~(-6))的函数关系。在所研究的应变振幅范围内,没有发现任何偏离线性的证据。为了说明气体压力媒介对试样扭力矩的影响,需对原始数据进行修正,这种修正仅对极短周期
For four groups of calcite rocks of essentially monolithic minerals, the shear modulus G and the related internal friction Q -1 were measured in the seismic frequency band, and the calcite particle size ranged from 4 to 1000 μm . Based on the previously described technique for observing the forced torsional oscillations of a system of rock columns and standard steels under high confining pressure at room temperature, the measurement of the behavior of each rock against pressure 0-300MPa), the oscillation period (1-300s) and the strain amplitude (the maximum amplitude at the interface 10 ~ (-8) -10 ~ (-6)). Within the range of strain amplitudes studied, no evidence of deviation from linearity was found. In order to illustrate the effect of the gas pressure medium on the torsional moment of the specimen, the raw data needs to be corrected. This correction is only valid for extremely short periods