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Paper Information

Journal:   JOURNAL OF SCIENCES (ISLAMIC AZAD UNIVERSITY)   FALL 2007 , Volume 17 , Number 65 (GEOLOGY ISSUE); Page(s) 111 To 126.
 
Paper: 

RECONSTRUCTION OF KUHBANAN FAULT SYSTEM SINCE LATE PLIOCENE, WEST OF BAHABAD, CENTRAL IRAN

 
 
Author(s):  SHAFIEI BAFTI A.*, SHAH PASANDZADEH M., POURKERMANI M., KHOSROU TEHRANI KH.
 
* GEOLOGY DEPARTMENT, SCIENCE AND RESEARCH CAMPUS, ISLAMIC AZAD UNIVERSITY, TEHRAN, IRAN
 
Abstract: 

Kuhbanan fault system, as one of the intercontinental faults of central Iran, is recognized by considerable seismogenic activities and modem morphotectonics evidences with a strike-slip (reverse component) motion. According to the geometric and kinematics data, Kuhbanan fault has been divided into 5 segments (S26, S27, S28, S29, S30) in Bahabad region. Measured geomorphic indices of ratio of valley-floor width to valley height (Vf) and morphology of the valley (V) manifest the maximum denudation rate for the S28segment. The mean calculated values of mountain-front sinuosity (Smf) and %facet parameters for different segments of the fault are 1.1 and 83.16, consequently. Regarding to these geomorphic indices, a denudation rate of about 2-4 mmyr-1 is suggested for this region.
According to reconstruction of Kuhbanan fault since 360 ka, minimum horizontal cumulative displacement of 750 m and minimum slip rate of about 2-1.4
±0.1mmyr-1 is inferred from well preserved geomorphology in the northern segment of the fault. Applying this horizontal cumulative displacement causes reconstruction of geomorphic markers such as drainages and shuttered ridges.

 
Keyword(s): ACTIVE TECTONICS, GEOMORPHIC INDICES, DRAINAGE RECONSTRUCTION, CUMULATIVE DISPLACEMENT, SLIP RATE, STRIKE-SLIP FAULT, KUHBANAN FAULT SYSTEM
 
References: 
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  Persian Abstract Yearly Visit 66
 
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