规则形体垂直磁梯度场研究及应用

磁梯度测量是随着磁法勘探技术的不断进步而发展起来的一种新技术。它具有不受日变和正常场因素的影响,能够全面利用磁场信息的优点。本文使用GSM-19磁力仪和Grad601-2垂直磁梯度仪观测球体模型和有限长水平圆柱体模型产生的总磁异常场和垂直磁梯度场,对它们的平面分布进行了对比分析,深入探讨地面垂直磁梯度测量的应用效果。最后,盘龙城府河工区疑似古墓葬的总场和梯度场测量结果对比分析说明,垂直磁梯度场能够突出弱磁异常信息。

Study of Vertical Magnetic Gradient Field of Rule Model and Its Application

Gradient magnetic field exploration is a newly developed magnetic exploration technology from previous single measurement of the total magnetic field. It can obtain more reliable information and compensate the defects of weak spatial resolution. The rule model experiments using the gradient magnetic field exploration technology show the characteristic contour distribution of the vertical gradient field and the total field. To justify the practical application, the magnetic anomalies caused by the suspected ancient tombs of the Fuhe area of Panlongcheng district were measured by GSM--19 and Grad601--2 using both total field and gradient field exploration technology. The comparison between the two different methods indicates the vertical magnetic gradient measurement method could high light better the weak magnetic anomaly.