| 对部分简单形体产生的自然电位进行定量分析 |
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| 引用本文： | 欧塬圩.对部分简单形体产生的自然电位进行定量分析[J].地质与勘探,2017,53(2):310-317. |
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| 作者姓名： | 欧塬圩 |
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| 作者单位： | 东华理工大学地球物理与测控技术学院,江西南昌 |
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| 摘 要： | 本文提出了一种新的特征点法,并在前人的基础上改进了一种数值计算方法(最小二乘法),以此来确定部分具有自然电位异常简单地质体的形态(形态系数)、埋藏深度、极化角和电偶极矩。特征点法通过剖面上三个特殊点(两个极值点和零电位点)的值以及它们相互间的距离便可快速求取地质体各参数。改进的最小二乘法则是在前人的基础上加入了零电位点的计算及其它处理方法,以此来获得准确性更高的地质体各参数。两种方法都被用来计算加入±5%随机误差的理论模型数据,并在土耳其的一个实际野外数据中得到测试。结果表明所求的参数与实际参数具有较好的一致性。
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| 关 键 词： | 球体 水平圆柱体 自然电位 特征点法 最小二乘法 |
| 收稿时间： | 2016/11/25 0:00:00 |
| 修稿时间： | 2017/1/2 0:00:00 |
Quantitative interpretation of self-potential anomalies produced by some bodies with simple geometry |
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| Ou Yuan-wei.Quantitative interpretation of self-potential anomalies produced by some bodies with simple geometry[J].Geology and Prospecting,2017,53(2):310-317. |
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| Authors: | Ou Yuan-wei |
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| Institution: | School of Geophysics and Measurement-control Technology, East China Institute of Technology, Nanchang, Jiangxi |
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| Abstract: | We have developed a new method using characteristic points and have improved a numerical method (a least-squares method) based on previous research to determine the shape (shape coefficients), depth, polarization angle, and electric dipole moment of a buried simple geometric structure from residual self-potential anomalies. The method using characteristic points is to define the anomaly values at three characteristic points and their corresponding distances on the anomaly profiles, which permits to obtain the four parameters rapidly. In the improved least-squares method, adding the calculation of the zero-potential point and other processing procedures allows us to determine the four parameters with a higher accuracy. Both the two methods have been tested on synthetic data (which is added ±5% random error) and a field data from Turkey. The results show a good agreement with the actual parameters. |
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| Keywords: | sphere horizontal cylinder self-potential the method of using characteristic points the least-squares method |
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