Two-dimensional inverse modeling of sedimentary basin subsidence
Two-dimensional inverse modeling of sedimentary basin subsidence
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DOI：
10.1029/1999jb900211
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发表时间：
2001-04
影响因子：
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通讯作者：
K. Poplavskii;Y. Podladchikov;R. Stephenson
中科院分区：
文献类型：
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作者：
K. Poplavskii;Y. Podladchikov;R. Stephenson
近年来发展起来的伸展盆地沉降数学模型为正演模拟提供了良好的基础。然而，用户需要指定的大量参数不仅使建模本身变得困难，而且还难以判断结果的含义。提出了一种自动搜索二维盆地形成模型最佳拟合参数集的新方法。加权的目标函数被用于反问题求解算法的最小化过程中。在这种情况下，标称参数集包括地壳和壳下减薄因素的剖面，以及岩石圈颈缩的水平。该方法进行了测试的合成数据与参数，预先扰动。在某些限制条件下，算法能够解决这种扰动。反演技术已被应用到两个剖面穿越第聂伯-顿涅茨克盆地（乌克兰）。地壳减薄因素认为，一个剪刀式的盆地开放。高的地壳下减薄值是必要的，以解释异常厚的石炭纪部分在盆地。这些值应被视为累积的，由于目前无法解决的其他裂谷相关的过程，特别是相变的影响。
Recently developed mathematical models of subsidence in extensional basins provide a good basis for forward modeling. However, the large number of parameters to be specified by the user makes it difficult not only to do the modeling itself, but also to judge the meaning of the results. We present a new method for automatic searching of the best-fitting parameter set of a 2D basin formation model. Weighted goal functions are used in the minimization process by the inverse problem solver algorithm. The nominal parameter set in the present case includes profiles of the crustal and subcrustal thinning factors, and the level of lithosphere necking. The method was tested on synthetic data with parameters that were perturbed beforehand. With some restrictions, the algorithms are capable of resolving such perturbations. The inversion technique has been applied to two profiles crossing the Dnieper-Donets Basin (Ukraine). The crustal thinning factors obtained argue for a scissors-like style of basin opening. High subcrustal thinning values are necessary in order to explain the abnormally thick Carboniferous section in the basin. These values should be treated as cumulative ones due to the currently unresolvable influence of other rifting-related processes, particularly phase transitions.