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| 磁场总梯度切线法反演二维磁性体的参数 | |
| 引用本文： | 徐世浙,蔡振京,倪逸.磁场总梯度切线法反演二维磁性体的参数[J].物探与化探,1991,15(5):330-339. |
| 作者姓名： | 徐世浙 蔡振京 倪逸 |
| 作者单位： | 青岛海洋大学 (徐世浙)，地矿部航空物探遥感中心 (蔡振京)，中国石油天然气总公司物探局解释中心(倪逸) |
| 摘 要： | 将实测的T异常,转换成总梯度异常,我们称之为TT异常.文中介绍的板状体的TT异常具有许多特点:1)与磁化方向无关;2)与地磁场倾角无关;3)曲线形态简单,近似对称;4)横向分辩率高.我们用切线法对TT曲线反演求板状体的顶面深度和磁化强度.在TT曲线上,切线法的截距与板状体顶深的关系文中作了详尽讨论并绘出了误差范围.本方法的计算速度比较快,对于一条500个点左右的剖面,用AT级微机反演深度的时间约为15秒. |
| 关 键 词： | 磁场 总梯度 反演 二维 磁性体 |
THE INVERSION OF TWO-DIMENSIONAL MAGNETICBODY BY THE TANGENTIAL METHOD FOR TOTALGRADIENT OF MAGNETIC FIELD |
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| Institution: | 1. Qingdao University of Oceanography; 2. Aerogeophysical Remote Sensing Center, Ministry of Geology and Mineral Resources; 3. Interpretation Center, Bureau of Geophysical Prospecting, China Oil and Gas Corporation |
| Abstract: | The observed anomaly T is converted into the total gradient anomalywhich we call TT anomaly. The TT anomaly caused by a plate is characterizedby 1) being independent of magnetization direction; 2) having nothing to dowith dip angle of the georuagnetic field; 3) simplicity in shape of curve, i. e.nearly symmetrical; and 4) high lateral discriminability. Making inversion ofTT curve with the tangential method, we evaluated the top depth and magne-tization intensity of the plate. The relationship between the intercept of thetangential method and the top depth of the plate on TT curve is discussed indetail with the error range given.The computation speed of this method is rather high: it takes only 15seconds to invert a profile of 500 points on an AT personal computer. |
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