Reactivation of Normal faults in the Cretaceous limestone (NE, Kerman): Kinematic evidences and Paleostress estimation

Document Type : Original Article

Authors

Department of Geology, Faculty of Sciences, Shahid Bahonar University of Kerman, Kerman, Iran

Abstract

Abstract
The Cretaceous limestone in the NE of the Kerman show the several evidences of faulting. In this study, the faulting style was evaluated using paleo stress methods such as multiple inverse, determination of compressive and tensile axis and slip line configuration method.  The results of these methods revealed the effect of two phases of faulting. The position of the maximum compressive axis is exactly separable in the normal and strike-slip faults. The evidences of faults planes, overprinting of slikenlines, displacment of normal faults and tension veins by strike slip faults show the reactivation of normal faults in strike slip fault pattern. In the two phase of faulting the shape of stress ellipsoid is prolate. The internal friction angle was calculated as 45 degrees for both of normal and strike slip faulting. The unscaled Mohr diagram method show the strike slip faulting under the conjugate pattern. The results of this study clearly show a change in the fault pattern from normal to strike slip.

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References

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Journal of Tectonics
Volume 2, Issue 5
May 2018
Pages 61-81

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