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众所周知,能准确地测定地磁三要素的历史,距今尚不足150年.因而,从观测到的地磁场资料来研究周期大于100年的地磁现象是根本不可能的.然而,利用古地磁学却能对以100年或更长时间为周期的地磁现象进行解析,这是因为古地磁学可利用岩石具有天然剩磁(NRM)——磁场“化石”这一性质.显然,为确保“化石”的纯洁性,所利用的NRM资料必须不为漫长岁月中的各种外界干扰(例如:变质、风化及雷击等)所混淆,这就促进了以研究岩石剩磁的性质及稳定性为主的地学分支——岩石磁学在蓬勃发展.显然,岩石磁学就是古地磁学的基础.本文仅就其中最基本的研究成果,分岩石中的铁磁性矿物、铁磁性矿物的氧化过程、热剩磁、化学剩磁和沉积剩磁以及剩磁的稳定性和退磁方法等五部分综述如下.
It is well-known that the history of geomagnetic three elements can be accurately measured for less than 150 years, so it is impossible to study geomagnetic phenomena with periods longer than 100 years from observed geomagnetic field data. However, the use of paleomagnetic The geomagnetic phenomena can be resolved over a period of 100 years or more due to the nature of paleomagnetic available NRM-magnetic “fossils.” Obviously, to ensure that “fossils” , The NRM data utilized must not be confused with various external disturbances (such as metamorphism, weathering and lightning strikes) over a long period of time, thus promoting the study of the nature and stability of rock remnant magnetism Geoscience branch - rock magnetism is flourishing.Obviously, rock magnetism is the basis of paleomagnetism.This paper only on the most basic research results, divided rock ferromagnetic minerals, ferromagnetic mineral oxidation process, the heat left Magnetic, chemical remanence and residual magnetism and residual magnetism stability and demagnetization method five parts are summarized as follows.