Investigations of Trishear Fault-Propagation Folding

9814348Allmendinger断裂传播褶皱及其产生的隐断层在逆冲带和伸展带中的作用、发震潜力和其他应用方面引起了人们的兴趣。运动学模型可以解释与这种构造相关的许多特征，而用其他运动学断褶模型来解释这些特征要复杂得多。然而，由于缺乏科学客观的选择模型关键参数的方法，“Trishear”模型并没有得到充分的应用。最近开发的六参数网格搜索反演程序从实际结构中提取最拟合的三剪切模型。该项目将使用该新程序广泛测试该反演程序，建立参数的地质物理控制和建模结果的含义。这项工作预计将确定其适用的条件范围，并为其应用提供一种方法

9814348Allmendinger Fault-propagation folds and the blind faults that produce them are of interest for their role in thrust belts and extensional provinces, and for their seismogenic potential and other applied aspects. A kinematic model can explain many of the features associated with such structures, which are more complicated to explain by other kinematiac fault-fold models. However, the "Trishear" model has not been fully applied due to the lack of any scientifically objective way of selecting key parameters of the model. A recently developed six parameters grid search inversion program extracts the best-fitting trishear model from real structures. This project will use this new program to extensively test this inversion program, estalish geologic physical controls on parameters and implications of the modeling results. This work is expected to estalish the range of conditions under which it applies and to provide a methodology for its application.***