论文部分内容阅读
本文利用考古地磁法,对北京地区汉、三国、唐、宋、金、元、明、清各朝代的古砖标本进行了研究,测定了标本的剩余磁性,并做了逐步加热的实验,从而推算出上述各时期北京地区的磁倾角值和磁埸强度值。结果表明,北京地区近两千午来磁倾角是在51°—66°之间变化,并且有循环性特征,其周期为一千余年;而地磁埸强度则是逐渐减小的,汉、三国、唐、宋、元、清各时期的地磁场强度分别为现代地磁埸强度的1.57,1.41,1.42,1.29,1.21,1.12倍。
In this paper, archaeological geomagnetic methods were used to study the ancient brick specimens of the Han, Three Kingdoms, Tang, Song, Jin, Yuan, Ming and Qing dynasties in Beijing, and the remaining magnetic properties of the specimens were measured. Calculate the above values of magnetic dip angle and magnetic flux density in Beijing during the above periods. The results show that the dip angle of magmatic rocks in Beijing has changed from 51 ° to 66 ° in the past two thousand years and has cyclic characteristics with a period of more than a thousand years. However, the geomagnetic 埸 intensity gradually decreases, while that of Han, Three kingdoms, Tang, Song, Yuan and Qing Dynasties of the geomagnetic field intensity of the modern geomagnetic 埸 intensity of 1.57,1.41,1.42,1.29,1.21,1.12 times.