Volume 22, Issue 1 (4-2014)                   www.ijcm.ir 2014, 22(1): 15-26 | Back to browse issues page

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Structural analysis and deformation conditions in the Kuh-e-Sarhangi shear zone of the Deh Zaman granite, NW of the Lut Block. www.ijcm.ir 2014; 22 (1) :15-26
URL: http://ijcm.ir/article-1-249-en.html
Abstract:   (2683 Views)

The Kuh-e-Sarhangi shear zone, with N70°E striking, is the northeastern part of the Kashmar-Kerman tectonic zone locating at the NW of the Lut Block.  The Late Precambrian-Early Cambrian four granitic bodies have been intruded in the Kuh-e-Sarhangi shear zone. The Deh Zaman granite consists of two mezocrat and hololeucocratic bodies that are presenting strong ductile deformation and the mylonitic foliation wich is well developed. This strong mylonitic foliation displays steeply dipping to the NE (S62 o E/80o,). The plunge of the kinkfold axis and rake of the stretching lineation on the mylonitic foliation is about 75o and 35o to E-SE, respectively. Micro-structural shear sense indicators including oblique foliation, asymmetric porphyroclast, mica fish and of shear bands that show sinistral sense of shear. Quartz and feldspar microstructures are studied in order to find out  deformational conditions.­ Sub-grain rotation recrystallization (SGR) in quartz grains and brittle deformation to bulging (BLG) recrystallization in feldspar grains indicate 300oc – 500oc temperature of deformation that is consistent with green schistto epidote amphibolite facies conditions. These evidences also confirm the delay of deformation with respect to the granite intrusion.

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