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Paper Information

Journal:   GEOSCIENCES   SUMMER 2017 , Volume 26 , Number 104 ; Page(s) 95 To 102.
 
Paper: 

THE ZAYANDERUD METAMORPHIC COMPLEX, NORTH OF SHAHREKORD: TWO ENTIRELY DIFFERENT INTERPRETATIONS OF A BASEMENT COMPLEX IN THE NAJAFABAD AND CHADEGAN MAPS

 
 
Author(s):  JAMALI ASHTIANI R., HASSANZADEH J.*, RAHGOSHAY M.
 
* CALIFORNIA INSTITUTE OF TECHNOLOGY, CALIFORNIA, USA
 
Abstract: 

Two different ages of Precambrian and Jurassic are considered for the Zayanderud metamorphic complex in the Najafabad and Chadegan geology maps, respectively. This disagreement has made these two maps to be the most incompatible adjacent maps. The metamorphic complex is no nconformably covered by fossiliferous Permian limestones suggesting a Pre-Permian age. This relative age is supported by206Pb/238U zircon ages of Neoproterozoic for the cross-cutting mylonitic orthogneisses. In this paper we discuss the Jurassic age considered for protolith of the metamorphic and granitoid rocks in the Chadegan map as an misunderstanding in field observations. Also we argue that Ar/Ar Jurassic ages represent the time of metamorphism and do not reflect the protolith age.

 
Keyword(s): ZAYANDERUD METAMORPHIC COMPLEX, GEOLOGICAL MAP OF NAJAFABAD, GEOLOGICAL MAP OF CHADEGAN, PRECAMBRIAN, JURASSIC
 
References: 
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