Paper Information

Journal:   JOURNAL OF SCIENCES (ISLAMIC AZAD UNIVERSITY)   FALL 2007 , Volume 17 , Number 65 (GEOLOGY ISSUE); Page(s) 81 To 90.
 
Paper: 

ACTIVE TECTONICS IN KHORRAMABAD

 
 
Author(s):  MAFAKHERIAN S.A.*, POURKERMANI M.
 
* GEOLOGY DEPARTMENT, KHORRAMABAD BRANCH, ISLAMIC AZAD UNIVERSITY, KHORRAMABAD, IRAN
 
Abstract: 

Alluvial channels are sensitive in regard to changes of rivers and allocations of sedimentary load. A lot of the changes which occur in morphologic channel during the time, can be related to the mentioned changes. From the new view point of tectonic, growing faults and folds are to be counted as the most usual part of structures which effect the river's system.
The size and length of the rupture increases by the replacement in fault's direction. In folds that are located above the blind faults, the folds are expected to grow in length and width side.
By expanding faults plate, as that limbs come up related to local base level. It is often pointed to khorramabad Anticline as an instance of high Zagros' folds the Khorramabad River, in its route of 46 km, passes through the city's anticline. This anticline is located on a hanging wall-part of the blind faults of high Zagros (Berberian 1995).
In this study, for avaluating the amount of activity of khorramabad anticline, some qualified indexes in direction of the khorramabad river were studied and measured.(e.g. guardian index of river's slope, sinusity of lengthwise profile and river's terraces). It was tried to find the appropriate estimation from the position of this anticline and also the part of high Zagros that located below that. It is called khorramabad fault (tavakoli and shabanian 2000), is account as a part of fault zone of high Zagros (Barbarian 1995). Regarding to the fact that Khorramabad fault is a part of a blind fault in Zaros zone it is very important of to prove its activity for using in evaluating the hazard seismic of this area and even city planning's. As a result, considering the agitations in the river system of khorramabad, is an efficient tool for the recognation of the activeness of khorramabad's anticline as well as it's original fault.

 
Keyword(s): ACTIVE TECTONICS, BLIND FAULT, GUARDIAN RIVER, SINUSITY OF RIVER
 
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