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Structural Analysis of Lahijan Fault Zone - Western Alborz

Document Type : Original Research Paper

Authors

1 Assistant Professor, Department of Geology, Faculty of Science, Golestan University, Gorgan, Iran

2 Assistant Professor, Research Institute for Earth Sciences, Geological Survey of Iran, Tehran, Iran

3 M. Sc., Department of Geology, Faculty of Science, Golestan University, Gorgan, Iran

Abstract

Lahijan fault zone is one of the transverse faults in western Alborz which with, sinistral mechanism caused structural deformations in this region. In this research, with using of field investigations, Remote Sensing techniques and statistical structural analysis methods, the structural analysis of Lahijan fault zone is performed and consequently, the fault zone (Geometry) is constructed. On the basis of results of this research, the Lahijan fault with attitude N 55/70-SE has 30 Km width. This fault zone is considered as sinistral fault zones which have different related fractures. The fractures related fault zone are ordered as syntethic and Antithetic faults. Most of faults in this fault zone have Net- slip movements and the angle of these to main fault zone, specified their mechanisms so, the parallel faults zone have left- lateral movements and in opposite, the faults with angle of 75˚ related to fault zone trend, have Right- lateral movements. Due to progressive sinistral deformation, all of structures rotated counter- clockwise and placed in lesser angle relative to this shear zone.

Keywords

References
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Scientific Quarterly Journal of Geosciences
Volume 22, Issue 88
December 2013
Pages 13-18
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