| 解释位场全张量数据的张量局部波数法及其与常规局部波数法的比较 |
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| 引用本文： | 马国庆,杜晓娟,李丽丽.解释位场全张量数据的张量局部波数法及其与常规局部波数法的比较[J].地球物理学报,2012,55(7):2450-2461. |
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| 作者姓名： | 马国庆 杜晓娟 李丽丽 |
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| 作者单位： | 吉林大学地球探测科学与技术学院, 长春 130026 |
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| 基金项目： | 中国地质调查局地质矿产调查评价专项项目 |
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| 摘 要： | 全张量探测技术以其信息量大、精度高、干扰小等优点在地球物理领域中得到广泛应用.本文提出采用张量局部波数法来进行位场全张量数据的解释,首先给出了张量局部波数的定义,然后推导出利用张量局部波数法进行反演的基本公式.本文方法在进行张量数据反演时无需事先知道场源体的类型(构造指数)即可获得场源体的位置信息,且可根据位置参数对场源体的类型进行估计.通过理论模型证明张量局部波数法可以很好地完成位场全张量数据的反演工作,并将其与常规局部波数法进行对比,证明全张量局部波数法的反演结果更加准确,即使在测点分布不合理的情况下,张量局部波数法仍可以获得准确的结果.最后应用张量局部波数法对美国得克萨斯州实测重力数据进行了反演,其反演结果与已有的研究成果相一致.
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| 关 键 词： | 位场全张量数据 张量局部波数 构造指数 反演 |
| 收稿时间： | 2011-12-08 |
Comparison of the tensor local wavenumber method with the conventional local wavenumber method for interpretation of total tensor data of potential fields |
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| MA Guo-Qing
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DU Xiao-Juan
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LI Li-Li.Comparison of the tensor local wavenumber method with the conventional local wavenumber method for interpretation of total tensor data of potential fields[J].Chinese Journal of Geophysics,2012,55(7):2450-2461. |
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| Authors: | MA Guo-Qing DU Xiao-Juan LI Li-Li |
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| Institution: | College of Geoexploration Science and Technology, Jilin University, Changchun 130026, China |
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| Abstract: | Measurements of potential field tensor(PFT)data have been widely used in the exploration of geophysics because of the advantages of big capacity,high-precision,and low noise.In this paper,we propose to use the tensor local wavenumber(TLW) method to interpret total tensor data of potential fields.We firstly define the tensor local wavenumber,and then derive the inversion formula based on the tensor local wavenumber.The TLW method does not require any prior information about the nature of the source to estimate the location parameters,and then the nature of the source can be obtained by the source location parameters.The TLW method is demonstrated on theoretical potential field data,and we compare it with the conventional local wavenumber(CLW) method.The results show that the inversion results of the TLW method are more accurate.Especially in the case that observational points are distributed unreasonable,the TLW method still can give accurate results.At last,we apply the TLW method to a gravity data example in Texas,USA,and the inversion results are in consistent with previous results. |
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| Keywords: | Potential field tensor data Tensor local wavenumber Structural index Inversion |
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