This paper reviews different approaches to the problem of finding the shape of the basement buried under sedimentary basins from gravity data and explores the applicability of a recently proposed method to a well-constrained real case, comparing the results obtained with the models computed using a variety of techniques. Many gravity inversion techniques to estimate the depth to basement based on rather different approaches have been proposed. As is well known, the interpretation of gravity data requires certain assumptions about the source, aimed at constraining the solution of an ambiguous problem. The different approaches imply different kinds of solutions, namely a density contrast distribution at depth, or a grid defining the depth to basement in the entire area of study or several single depth estimates. Each approach has its own advantages and weaknesses. In this context, special attention is given to the ITerative RESCaling method (ITRESC), which has been recently proposed. In this method, there is no need to assume a density function, which is estimated by a data-driven procedure and then used to generate a grid of the depth to basement. This technique is based on the depth–gravity relation plot, illustrating the link between the depth to basement, known at some control points (e.g., boreholes or interpretation of other geophysical data), and the values of the residual gravity anomaly. An important feature of the ITRESC method is that borehole control points are used globally rather than locally, providing constraints for all parts of the model. The main features of this innovative method are illustrated and evaluated by its application to the gravity anomalies of the Yucca Flat basin (Nevada). The results are compared with models obtained by previous gravity interpretations and by the processing of other geological and geophysical data.

中文翻译：

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从重力数据估计沉积盆地下的基底深度：方法和 ITRESC 方法的回顾，并应用于丝兰平原盆地（内华达州）

本文回顾了从重力数据中找到埋藏在沉积盆地下的基底形状问题的不同方法，并探讨了最近提出的方法对约束良好的实际情况的适用性，将获得的结果与使用各种计算的模型进行了比较。的技术。已经提出了许多基于相当不同的方法来估计地下室深度的重力反演技术。众所周知，重力数据的解释需要对来源进行一定的假设，目的是约束一个模糊问题的解决方案。不同的方法意味着不同种类的解决方案，即深度的密度对比度分布，或定义整个研究区域中地下室深度的网格或几个单一的深度估计。每种方法都有自己的优点和缺点。在这种情况下，特别关注最近提出的迭代RESCaling 方法（ITRESC）。在这种方法中，不需要假设密度函数，它通过数据驱动程序估计，然后用于生成到地下室深度的网格。该技术基于深度-重力关系图，说明在某些控制点（例如，钻孔或其他地球物理数据的解释）已知的深度与基底之间的联系，与残余重力异常值之间的联系。ITRESC 方法的一个重要特点是钻孔控制点是全局使用的，而不是局部使用的，为模型的所有部分提供约束。通过将这种创新方法应用于尤卡平原盆地（内华达州）的重力异常，说明和评估了这种创新方法的主要特征。结果与以前的重力解释和其他地质和地球物理数据处理获得的模型进行了比较。