摩擦滑动对石英和方解石热释光性质的影响及其地震地质意义

EFFECT OF FRICTIONAL SLIDING ON THERMOLUMINESCENT PROPERTY OF QUARTZ AND CALCITE AND ITS SEISMOGEOLOGICAL SIGNIFICANCE

通过高温高压实验及热释光测量建立了石英在100MPa和方解石在30MPa围压下剩余热释光强度随温度的变化曲线,以此为据,通过三轴摩擦实验前后样品的热释光测量,研究了相应围压、不同错动速率下摩擦滑动对石英和方解石剩余热释光强度的影响及其反映的温度变化。在此基础上,根据已有理论结果和实际资料,对利用热释光方法断代及推测断层活动方式的可能性等问题进行了讨论。

The curves showing the change of residual thermoluminescent density of quartz and calcite with temperature at confining pressures of 100 MPa and 30 MPa, respectively, are established from the results of experiments under high temperature and pressure. According to the curves, the effect of frictional sliding under the corresponding confining pressures and at different sliding rates on residual thermoluminescent density of quartz and calcite and related temperature change are studied by means of triaxial frictional experiments and thermoluminescent measurements. Based on the result and the existing theory, the applicability of thermoluminescent method to dating the faulting and to determining the sliding mode along the fault is discussed.