پهنه برشي زرين (شمال اردكان) و اهميت تكتونيكي آن در خرد قاره ايران مركزي

The Zarin Shear Zone and Itʹs Tectonic Importance in Central Iranian Micro- Continent

Zarin ductile shear zone in north Ardakan with N-S orientation and arc geometry concaving to the west contains parts of Zarin granite and Paleozoic metamorphic rocks that were deformed to mylonites and ultra-mylonites. This shear zone is the same as the grater dextral strike-slip ductile shear zone to the east (Kashmar-Kerman shear zone), that is the tectonic boundary of Yazd block to the west and Tabas block to the east in the central micro-plate of Iran. The major boundary faults of the tectonic blocks in the central micro-plate of Iran change their N-S trend (Nayband fault) to arc shape to the west (Kashmar-Kerman shear zone) and the arc form is continued to the west in Zarin shear zone. All these fault systems are strike-slip with dextral sense of shear. Fabric evidences in Zarin shear zone indicate that possibly it was originally in N-S direction and gradually was changed to arc form.