Formation of Extensional Basin in Internal Part of the Zag-Ros Orogeny in West of Sirjan, Iran

• 作者: Ali Yassaghi Amin Azadikhah Mohammad Hashem Emami Soheila Bouzari
• 来源期刊: 地质学期刊(英文)
• 学科: 地球科学
• 关键词: ZAGROS OROGENY THRUST FAULTS TRANSPRESSION STRIKE Slip FAULTS
• 年，卷（期）: 2015,（11）
• 页码范围: 821-827
• 页数: 7页
• 分类号: P54

摘要

Oblique continent—continent collision between Iranian microcontinent and Arabian plate is the main cause of transpression and transtension regimes in this area. Zagros orogeny in this area resulted in formation of various structures including thrust fault-related folds, dextral and sinistral, strike slip faults, normal fault related to dextral strike slip fault. Thrust faults within the area under study are duplex with general trend of NW-SE and dip toward the north-east with right slip component. Strike slip fault regime acts as tear fault and it is active yet. Therefore, simultaneous presence of thrusts and strike slip faults illustrates convergent dextral transpressional tectonic regime while this transpressional regime accompanied with transtension as well;since normal faults are also seen in alluvium around depression of Sirjan which can be as a result of extension stresses due to strike slip faults activity of the district. The results achieved from geometry and kinematic analysis of west of Sirjan structures indicate that structures of the area have characteristics of internal part of Zagros orogeny.