Analysis of lineaments and fractures related to the Sahneh fault zone using remote sensing and fractal techniques (west Iran)

Document Type : علمی -پژوهشی

Authors

1 Assistant,Professor Faculty of Sciences, Bu- Ali Sina University, Hamedan

2 MS.c Student of Tectonic, Faculty of Sciences, Bu-Ali Sina University, Hamedan

Abstract

The Sahneh fault with about 100 km length and strike-slip mechanism is located in the central parts of the MRF and divided into three segments as south-east, central and north-west sections. Firstly, in this study fractures and structural lineaments of the Sahneh fault zone have extracted using remote sensing techniques, Landsat satellite images and digital elevation model. Then, with fractal analysis of the fractures and lineaments of the study area, fractal dimension has computed for determination of high-density fractured area and detailed field studies. Fractures and lineaments of the region have a main trend near the main fault and indicate a high density near the fault zone. A fault plane with N60W/75SE strike, dip and 15S slip vector rake have obtained from the field studies along the south-east segment that indicates right-lateral strike-slip movement of the fault with normal component. Along the central segment, right-lateral movement of the fault caused about 16 km drainages offset. In the north-west segment of the Sahneh fault, a right-lateral offset along the drainages is visible and about 850 m offset have evaluated with restoration of the drainages to the initial stage.

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