Writers : Hosini, Saeedeh;Ghoorchi, Maliheh
Refference : The first international applied geological congress; Department of geology Islamic azad university- Mashhad
Publishing Year : 2010

Abstract :

Nehbandan area is situated in East Iran in South Khorasan province. The study area is located in high risk situation in South Khorasan. Recognizing of hidden quaternary fault, is one the most important objects in such area. Various kinds of geological evidence have recently been used to show the presence of a fault. On the other hand channel orientation is one of the geomorphic observables for fingerprinting modes of tectonic in active environment. This paper reviews data on the orientation of drainages in Nehbandan area to test the occurrence of fault river system. GIS computational methodologies and associated programs have been used for this purpose. Rose diagrams are used to compare drainage orientation with main structures like faults. To extract drainages, data are collected from Nehbandan sheet by1:100000 scale and completed by a field work. The methodology is supported by drainage orientation. Study area divided in 3 regions. Zone A include North east part, B for South east part and other as zone C from North to south. In A Orientation of river and faults have no correlation. Comparison of drainage directions with faults directions show that In B, both show main direction as 300 to 315°. Faults in C part are developed in two principle directions, 315-330° and 355-360°. The principle drainage directions are 300 to 315°. Our findings highlight a connection between drainage evolution and underlying structural factors in B and C part. There may besome genetic relationship between the drainage and the trending faults. Our study has demonstrated a link between easily identifiable geomorphic features with tectonic structures.

Subject List : Fault