Gravity interpretation using Fourier transforms and simple geometrical models with exponential density contrast
Gravity interpretation using Fourier transforms and simple geometrical models with exponential density contrast
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DOI：
10.1190/1.1443491
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发表时间：
1993-08
期刊：
影响因子：
3.3
通讯作者：
D. Rao;M. J. Prakash;N. R. Babu
中科院分区：
文献类型：
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作者：
D. Rao;M. J. Prakash;N. R. Babu
沉积盆地中密度差的减小通常可用指数函数来近似。理论傅立叶变换来自对称梯形，垂直断层，垂直棱柱，向斜，和背斜模型。这是所希望的，因为对于与指数密度对比相结合的这些模型，在空间域中没有等效的闭合形式解。这些变换表现出特征的最小值，最大值和零值，因此图形方法已被开发用于解释模型参数。在应用端部校正以改进观测重力数据的离散变换之后，对变换进行模型参数解释。这种方法首先在两个合成模型上进行了测试，然后应用于圣哈辛托地堑和洛杉矶盆地的重力异常。
The decrease of density contrast in sedimentary basins can often be approximated by an exponential function. Theoretical Fourier transforms are derived for symmetric trapezoidal, vertical fault, vertical prism, syncline, and anticline models. This is desirable because there are no equivalent closed form solutions in the space domain for these models combined with an exponential density contrast. These transforms exhibit characteristic minima, maxima, and zero values, and hence graphical methods have been developed for interpretation of model parameters. After applying end corrections to improve the discrete transforms of observed gravity data, the transforms are interpreted for model parameters. This method is first tested on two synthetic models, then applied to gravity anomalies over the San Jacinto graben and Los Angeles basin.