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火山岩可靠地记录了古地磁场强度的变化历史,用它来研究古磁场强度比用沉积岩来得准确、有效。为了探讨第四纪以来古地磁场强度的大小和变化规律,我们对采自河北省井陉县雪花山,山西省大同地区黄家洼和下深井,山东省无隶县小山等处的玄武岩古地磁样品共13块,用特勒尔(Thellier)方法作了热磁分析。用小无定向磁力仪和JR-4旋转磁力仪对样品进行测量,分别获得了古地磁场强度值。
Volcanic rocks reliably record the changing history of the paleomagnetic field strength, and it is more accurate and effective to study the intensity of the ancient magnetic field than the sedimentary rock. In order to investigate the magnitude and variation of paleomagnetic field intensity since the Quaternary, we analyzed the paleomagnetic geology of basalts collected from Xuehuashan in Jingtai County of Hebei Province, Huangjiawa and Xiaoliudi in the Datong region of Shanxi Province, and the hills of Wuzhuang County in Shandong Province A total of 13 samples were used for thermal analysis with Thellier method. The samples were measured with a small non-directional magnetometer and a JR-4 rotating magnetometer to obtain the values of paleomagnetic force.