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粘土矿物在浅部断层带中广泛存在,而其特殊的力学性质会显著影响断层的强度以及断层错动的行为模式.因此在浅部断层地质条件下,针对粘土矿物摩擦滑动特性的研究对于我们解释和预测断层的活动行为有重要意义.本文系统地总结了前人的工作,发现含水条件,以及温度和压力的变化都会影响到粘土矿物的摩擦强度,在自然断层带中断层强度随着粘土含量的增加而系统性的降低,但是粘土矿物在断层带中不同的分布状态会造成显著不同的断层弱化.当断层带岩石中含有少量的粘土矿物时,粘土矿物对断层强度的组构弱化远大于其在断层带中均匀分布时所造成的弱化作用.粘土矿物对于断层滑动的弱化和稳定性作用在断层浅部(<8 km)的温度(<150℃)和压力条件下没有发生明显的变化.在断层带粘土矿物的研究中,相比于粘土矿物在断层岩石中的绝对含量,我们应更多的关注粘土矿物在断层带中分布的组构.
Clay minerals widely exist in the shallow fault zone, and their special mechanical properties will significantly affect the strength of faults and the fault movement patterns. Therefore, in shallow fault geology, the study on the friction and sliding properties of clay minerals is of great significance to us It is of great significance to explain and predict the activity of faults.This paper systematically summarizes the work of predecessors and finds that the changes of water content and temperature and pressure all affect the frictional strength of clay minerals. However, the different distribution of clay minerals in the fault zone can cause significantly different weakening of the fault.When a small amount of clay minerals are contained in the fault zone rock, the structure of clay minerals weakens the strength of the fault greatly The weakening effect of clay minerals on the weakening and stability of fault slips did not appear obvious at the temperature (<150 ℃) and the pressure of shallow faults (<8 km) In the study of faulted clay minerals, we should compare more to the absolute content of clay minerals in faulted rocks Follow fabric clay mineral distribution in the fault zone.