Volume 6, Issue 1 (Spring & Summer 2020)
KJES 2020, 6(1): 21-40 |
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Ahmadi Comijnay N, Khatib M M, Gholami E, Mirab Shabestari G, Zarrinkoub M H. Investigation on Structural Evolution in Transperssional Zones based on Quantitative data from Measurements of Strain Parameters Case Study: Northern part of Sistan Suture zone, Tutak and Mahirud Regions. KJES 2020; 6 (1) :21-40
URL: http://gnf.khu.ac.ir/article-1-2703-en.html
URL: http://gnf.khu.ac.ir/article-1-2703-en.html
Nasser Ahmadi Comijnay * 
1, Mohammad Mahdi Khatib2 , Ebrahim Gholami2 , Gholamreza Mirab Shabestari2 , Mohammad Hosein Zarrinkoub2
1, Mohammad Mahdi Khatib2 , Ebrahim Gholami2 , Gholamreza Mirab Shabestari2 , Mohammad Hosein Zarrinkoub2
1- University of Birjand , comijany@birjand.ac.ir
2- University of Birjand
2- University of Birjand
Abstract: (1201 Views)
Deformed rock units in Tutak and Mahirud regions in northern part of Sistan suture zone include ophiolite, igneous and sedimentary rocks. In this research, based on microstructures and by using Rf /Ф and shear strain methods, finite strain and vorticity analyses were carried out on both sections. The estimated values of mean strain ellipsoid shape (K-value) for both A and B sections are 0.67 and 0.78 respectively, which show flattening strain shape on the modified Flinn diagram and reveal a transpressional regime in the study area. The mean kinematic vorticity evaluated amounts for both A and B sections are 0.51 and 0.71 respectively.
Likewise, the relative contributions of the pure shear component with respect to the simple shear component are 66 to 34 percent for section A; whereas both pure and simple shear components for section B are 50 percent. These results confirm pervious study in this area which mentioned the amount of simple shear components decreased to the termination (to the north) of suture zone.
Likewise, the relative contributions of the pure shear component with respect to the simple shear component are 66 to 34 percent for section A; whereas both pure and simple shear components for section B are 50 percent. These results confirm pervious study in this area which mentioned the amount of simple shear components decreased to the termination (to the north) of suture zone.
Subject:
Tectonics
Received: 2019/06/14 | Accepted: 2020/05/19 | Published: 2020/08/31
Received: 2019/06/14 | Accepted: 2020/05/19 | Published: 2020/08/31
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