摘要
应力作用对岩石磁性的影响对于地震磁效应、磁性构造学、下地壳与上地幔物质磁性结构及陨石磁学研究等具有潜在的意义.本文对上世纪50年代以来,有关应力作用下,岩石(或磁性矿物)的磁化率及其各向异性、剩磁、磁滞特征和磁性(高温、低温)转换点等磁性特性的变化特征及影响岩石磁性对应力作用响应特性的主要因素进行了系统地总结.结果表明,应力作用对岩石各种磁性特征具有显著影响,在相关的磁学研究中,这种影响对研究结果的合理解释具有不可忽视的影响;另一方面,应力作用对岩石磁性的影响受到诸多因素的影响和控制,目前的认识多处于定性阶段,甚至存在不确定性,需要对磁性颗粒的微观力学效应进行观察与研究,在应力和外磁场可控的条件下,对含有各种粒度和磁性矿物的人工合成和天然样品进行各种磁性特征的宏观测量与分析,以深入认识和理解应力作用对岩石磁性的影响.
Effect of stress on rock magnetism has potential influences in studies on seismomagnetic effect, magnetoteetonics, magnetic structure of lower-crust/upper-mantle, magnetism of meteorite, and so on. The present paper summarizes the research progress in studies on the stress effect on rock magnetism, such as the effect of uniaxial, hydrostatic stress and shock on magnetic susceptibility and its anisotropy, remanence, hysteresis properties, Curie temperature and low-temperature magnetic transition, as well as the major factors controlling the magnetic response of rock/magnetic minerals to stress. The available studies have proved that the different stress patterns have significant effect on rock magnetism, and these effects can not be neglected or underestimated during the stress-related magnetic investigations. On the other hand, the stress effects on rock magnetism are complicated by many factors, and the available understanding of them are most likely to he qualitatively, even undetermined. Therefore, it needs urgently to observe and study the micromechanical effect of magnetic particle using the modern analysis and testing methods, to measurement the macroscopic magnetic properties of natural and synthetic samples bearing different magnetic minerals with various magnetic domain, under controllable conditions （e. g. , stress and applied field）, in order to improve the understanding of magnetic responses of rock/magnetic minerals to stress.
出处
《地球物理学进展》
CSCD
北大核心
2011年第4期1175-1185,共11页
Progress in Geophysics
基金
中国地震局地球物理研究所中央级公益性科研院所基本科研业务专项(DQJB09A01)资助
关键词
磁化率
剩磁
应力退磁
压剩磁
冲击剩磁
岩石磁学
magnetic susceptibility, remanence, stress demagnetization, piezo-remanent magnetization, shock remanent magnetization, rock magnetism
