Volume 10, Issue 1 (Spring & Summer 2024)
KJES 2024, 10(1): 152-178 |
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Ghasemi Siani M, Ebrahimi Fard H, Dolati A. Microtectonic and petrofabric investigation of graphite-bearing schist units in the Band-e-Cherk district, Kuh-e-Dom metamorphic zone. KJES 2024; 10 (1) :152-178
URL: http://gnf.khu.ac.ir/article-1-2899-en.html
URL: http://gnf.khu.ac.ir/article-1-2899-en.html
1- دانشکده علوم زمین
2- دانشکده علوم زمین ,hamedebrahimi772@gmail.com
2- دانشکده علوم زمین ,
Abstract: (206 Views)
The Band-e-Cherk district is located in the structural zone of central Iran, northeast of the city of Ardestan, and the Kuh-e-Dom metamorphic zone. The schist units hosting graphitization in the Kuh-e-Dom metamorphic complex are of Upper Paleozoic (Permian-Triassic) age and include muscovite schist to graphite-muscovite schist. In the studied area, the occurrence of tectonic activities and regional metamorphism by creating deformations in the schistose surfaces containing carbonaceous organic materials, have provided suitable spaces for graphitization and increase in carbon content. Three principal phases of folding and deformation have affected the schist units. The first generation of folding (F1) and metamorphism (D1), by creating a foliation (S1) parallel to the primary bedding (S0) and the axial surface of the fold (AF1), has played an important role in the concentration of organic carbon formed during the deposition and formation of graphite. The second generation deformation (D2) is associated with the intrusion of the diorite body and variations in the dip and strike of the limestone and schist beds as well as the morphology of the district. The mylonitization of the schist units is one of the most important effects of this stage of deformation. The third and final generation of deformation (D3) has been the result of directional pressure, it has been the result of deformation, mainly in brittle form. The formation of kink band structures (in quartz-feldspar and graphite bands), jagged and dendritic edges (in quartz and feldspar crystals), subgraining (in quartz and feldspar crystals), undulose extinction in quartz, recrystallization of quartz and feldspar crystals in the muscovite schist and graphite-muscovite schist units are among the evidences of this generation of deformation in the district.
Keywords: microtectonic, structural analysis, schistosity surfaces, graphitization, ductile deformation, Kuh-e-Dom metamorphic zone, Band-e-Cherk district.
Type of Study: Original Research |
Subject:
Tectonics
Received: 2024/05/6 | Accepted: 2024/07/1 | Published: 2024/09/9
Received: 2024/05/6 | Accepted: 2024/07/1 | Published: 2024/09/9
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