Paper Information

Journal:   GEOSCIENCES   WINTER 2010 , Volume 19 , Number 74; Page(s) 77 To 84.
 
Paper: 

GEOMETRY AND KINEMATIC ANALYSIS OF YOUNG NORMAL FAULTS IN SOUTHEAST TABRIZ

 
 
Author(s):  MOHAJJEL M.*, CHOLGOLY A.
 
* DEPARTMENT OF GEOLOGY, TARBIAT MODARES UNIVERSITY, TEHRAN, IRAN
 
Abstract: 

Abundant normal faults were locally developed in Pliocene-Quaternary detritus and pyroclastic sediments of Sahand volcano in southeast Tabriz. Well exposed normal faults are synthetic and antithetic, horst and graben and half graben structure systems, drag folds and roll-over anticlines were produced by normal faults. The average strike of these faults changes from dominant N-S in east to ENE- WSW in west. Dip of the fault planes changes due to layer competency and rotated older normal faults and layers were cut by later normal faults. In some cases vertical gashes were produced along fault planes and filled by the sediments of upper strata due to extension. Oversteps and bends also occur along normal faults in cross-section. Field investigations indicate that the syn-depositional extension occurred in Pliocene- Quaternary. Style and growth of normal faults in local distinct area in southeast Tabriz indicate that they were possibly produced by local extension (releasing zone) in relation with dextral strike-slip displacement of North Tabriz Fault.

 
Keyword(s): TABRIZ FAULT, NORMAL FAULT, SYN-DEPOSITIONAL EXTENSION, PLIOCENE, QUATERNARY SEDIMENTS, LOCAL EXTENSION
 
References: 
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