Paper Information

Journal:   JOURNAL OF SCIENCES (ISLAMIC AZAD UNIVERSITY)   FALL 2006 , Volume 16 , Number 61 (GEOLOGY ISSUE); Page(s) 51 To 61.
 
Paper: 

THE ROLE OF INTERMEDIATE DETACHMENT LEVELS IN VARIATION OF STRUCTURAL STYLE OVER THE GAVBANDI PALEOHIGH (SOUTHERN ZAGROS FOLD-THRUST BELT)

 
 
Author(s):  MOTAMEDI HOSSIEN*, POURKERMANI M.
 
* EXPLORATION DIRECTORATE OF N.I.O.C., TEHRAN , IRAN
 
Abstract: 

Variation in mechanical properties of stratigraphic unites (change in thickness or lithology) play an important role in structural style and folding mechanism. in this study, variation of structural style in the southern Zagros fold thrust belt (Fars geological province) in the both sides of a basement high (Gavbandi basement high) has been studied based on a regional balanced transect. This study relies on field work data, existing geological maps, seismic data and well information. Neoproterozoic Hormoz salt is the basal detachment level through the studied area, however, due to lack or thinning of Hormoz salt over the Gavbandi basement high and in the western side of Razak deep seated fault, its efficiency decreased as an basal detachment and resulted in activity of other potential intermediate detachment horizons in stratigraphic column (such as Triassic evaporates and shales, Dashtak Formation) during folding. This intermediate detachment level accommodated the shortening in different ways and lead to an obvious variation in structural style in the both sides of Gavbandi paleohigh.

 
Keyword(s): DETACHMENT SURFACE, HORMUZ SALT, GAVBANDI PALEOHIGH, ZAGROS
 
References: 
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