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首页> 外文期刊>Izvestiya. Physics of the solid earth >Technique for Combining Surface Wave Tomography with Receiver Function Results for Studying Upper Mantle Velocity Structure
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Technique for Combining Surface Wave Tomography with Receiver Function Results for Studying Upper Mantle Velocity Structure

机译：与接收器功能结合表面波断层扫描的技术，从而研究上地幔速度结构

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摘要

A technique is proposed for joint inversion of the surface-wave velocity dispersion data from long travelpaths and the results of the receiver function method. The technique is based on a modification of a surface-wave tomography procedure and allows for the use of the data not only from travelpaths but also obtained at individual isolated points. Initially, the data are reduced to a single type: either to surface wave velocity by calculating the dispersion curve from the vertical velocity section obtained by the receiver function method or to shear wave velocity by one-dimensional inversion of surface-wave dispersion curves from travelpaths. Thus, from the computational point of view, the problem reduces to the following one: to obtain a smoothed estimate of a two-dimensional function from the values of this function at individual points and its average values along lines (travelpaths) which can be considered as straight. A direct application of a surface-wave tomography procedure under the assumption that the points are lines of zero length is impossible because the solution turns out to be singular at the points. To get rid of this obstacle, it is proposed to replace the points by circles of a small radius surrounding these points. Then, the problem of tomography is generalized by using data not only from linear travelpaths, but also from circular travelpaths. A numerical study has shown that an addition of point data results in an increase in the resolution.
机译：提出了一种技术，用于从长行程路径和接收器功能方法的长度行驶路线的表面波速度分散数据的联合反演。该技术基于表面波断层摄影过程的修改，并且允许不仅可以从行程路径使用，而且允许在单独的孤立点处获得数据。最初，通过从通过接收器功能方法获得的垂直速度部分计算分散曲线或通过来自行程路径的表面波色散曲线的一维反转来计算来自垂直速度部分的色散曲线来减少到单个类型的单个类型。因此，从计算的视点来看，问题减少到下面的问题：从各个点处的该函数的值和其平均值沿着可以考虑的线（行程路径）来获得二维函数的平滑估计直。在假设点是零长度的线条下，直接应用表面波断层摄影过程是不可能的，因为解决方案在点处变为单数。为了摆脱这种障碍，建议通过围绕这些点的小半径的圆圈更换点。然后，通过不仅从线性行动路径使用数据，而且来自循环行程路径，通过使用数据来推广断层扫描问题。数值研究表明，添加点数据导致分辨率的增加。

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