重磁化时间限定及其意义  

The limitation of remagnetization time and its significance

作　　者：张伟杰 ZHANG Wei-jie(Department of Geology&State Key Laboratory of Continental Dynamics,Northwest University,Xi’an 710069,China)

机构地区：[1]西北大学地质学系/大陆动力学国家重点实验室,陕西西安710069

出　　处：《地下水》2020年第1期129-130,184,共3页Ground water

基　　金：国家自然科学基金项目(41474052)。

摘　　要：伴随着热事件、流体事件的发生,在温度升高或有流体的参与以及既有热也有流体参与情况下,矿物的交代、重结晶、新生矿物的形成普遍存在,在这种情况下原生剩磁容易被新生成的次生剩磁所覆盖。遭受过重磁化的研究对象可以根据其经历过的热事件、流体事件的时间确定其重磁化的具体时间及过程,提取出具有年代学意义的重磁化信息,再与已知古地磁学结果进行对比,进而分析研究区的精细构造演化历史。With the occurrence of thermal or fluid events,the temperature rising or the participation of fluids,moreover,the presence of both heating and fluids,the mineral replacement,again crystallization,and the formation of new minerals are common. In this case,the primary remain magnetization is easily covered by the secondary remain magnetization. Research objects that have suffered from again magnetization can been determined the specific time and process according to the time of thermal events and fluid events that they have experienced. So we can extract again magnetization information with specific time,then compare it with correct ancient geomagnetism results to analyze the fine tectonic evolution history of the study area.

关 键 词：重磁化 热事件 流体事件 年代学 古地磁学 

分 类 号：P318.44[天文地球—固体地球物理学]