Journal
JOURNAL OF STRUCTURAL GEOLOGY
Volume 22, Issue 4, Pages 441-452Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0191-8141(99)00163-7
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A new inverse technique is presented here to separate stresses from heterogeneous fault-slip data without a priori information on the stresses or on the classification of faults according to the stresses. Four parameters are determined by the inversion: one for the shape of the stress ellipsoid and three for the direction of the stress axes. Accordingly, the inversion is equivalent to the projection of the fault-slip data to a point in four-dimensional parameter space. The data are divided into k-element subsets to which the inverse technique is applied, where k = 4 or 5 is the optimal choice for the stability of solutions and for the reduction of computation. Significant solutions are identified as clusters in parameter space. The technique is demonstrated first by simulated fault-slip data. As an example, field data obtained from Miocene fore-are sediments in western Japan were processed by the method. (C) 2000 Elsevier Science Ltd. All rights reserved.
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