Graphical determination of principal stress directions for slickenside lineation populations: an attempt to modify arthaud's method |
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| Authors: | Pawel Aleksandrowski |
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| Institution: | Instytut Nauk Geologicznych, Uniwersytet Wroclawski, ul. Cybulskiego 30, 50–205 Wroclaw, Poland |
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| Abstract: | A new method of graphic determination of principal stress directions is proposed for slickenside populations produced in anisotropic rocks. Arthaud's concept of movement planes is advanced through studying variations in their pattern relative to the changing values of the principal stresses. These variations are recognizable by means of a simple test based on the Bott equation. In contrast to Arthaud's method, the proposed procedure is applicable to fault populations resulting from stress fields geometrically reproducible by a triaxial ellipsoid. A field example is given to demonstrate the practical utility of the method. |
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