نتایج جستجو برای: tectonic activity

تعداد نتایج: 1143351  

ژورنال: کواترنری ایران 2019
Almasian, Mahmoud, Pourkermani, Mohsen , Shahidi, Alireza , Zohrieh, Amir,

Introduction:    The study area has various types of geological structures, especially various types of fractures and folds. Evidence indicates that Structures with specific mechanisms in this area have been affected by Compressional - Tensile tensions.   Materials and methods:   To determine the direction of stress in the fault zone north of Tehran, from various tectonic evidences i...

Journal: :ecopersia 2012
ali reza ildoromi

study area is located in west of iran with relatively rough topography. lithologic units in the region belong from jurassic and cretaccous till recent era. the study area of the alvand mountain region is related to the tectonic zone of the sanandaj-sirjan region and the area dominant neo-tectonic regime appears to be compressional-extensional type. one of the identification tools to find out th...

ژورنال: :پژوهش های دانش زمین 0
انیس السادات خلیفه سلطانی دانشگاه شهید بهشتی سید احمد علوی دانشگاه شهید بهشتی محمد رضا قاسمی پژوهشکده علوم زمین، سازمان زمین شناسی و اکتشافات معدنی کشور

با توجه به لرزه خیزی ایران و اهمیت زمین ساخت فعال، در ارزیابی مخاطرات طبیعی، و مدیریت مناطق پر جمعیت شهری، مطالعات ریخت سنجی جهت تعیین فعالیت زمین ساختی نسبی ضرورت دارد. گستره مورد مطالعه در جنوب باختری شهرستان لنجان قرار دارد، و از نظر زمین ساختی در پهنه سنندج– سیرجان واقع گردیده است. در این پژوهش حوضه آبریز گستره مورد مطالعه، به سه بخش a، b و c تقسیم شده، و هر بخش نیز، در جایگاه خود به چندین ...

ژورنال: کواترنری ایران 2019
, ,

-Introduction The Main Recent Fault (MRF) is a seismic structure on the northwestern boundary of the Zagros belt and southern border of the Sanandaj-Sirjan belt. This fault as a major strike-slip fault consists of several segments in the Zagros collision zone. The seismic activity of the southwestern segments is greater than the northwestern segments. Several earthquake events have occurred al...

2017
Ali Fadaie Kermani Reza Derakhshani Shahram Shafiei Bafti

Morphotectonic indices by representing the longer period of time than recorded earthquake data, are useful in evaluating the tectonic activity of a region. Dashtkhak area is located in Kerman province of Iran, where one of the most active faults, Kouhbanan strike slip fault, passes through. This data article provides a precise level data on mountain fronts and valleys of Dashtkhak region that i...

2006
Kamal K. Sharma

Evolution of sedimentary basins took place in the Barmer, Jaisalmer and Bikaner regions during K-T (Cretaceous-Tertiary) time in western Rajasthan, India. These intra-cratonic rift basins developed under an extensional tectonic regime from early Jurassic to Tertiary time. Rift evolution resulted in alkaline magmatism at the rift margins. This magmatism is dated at 68.5 Ma and has been considere...

Journal: :تحقیقات جغرافیایی 0
مریم عزتی دانشکده علوم دانشگاه گلستان، مریم آق آتابای دانشکده ی علوم دانشگاه گلستان مریم آق آتابای دانشکده ی علوم دانشگاه گلستان

study area is located in the central kopehdagh north of bojnurd and shirvan cities, between kakli and raz villages. aim of this research is separating high activity area from low activity. in this study, in order to evaluate rate of tectonic activity, stream length-gradient index (sl), ratio of valley floor width to valley height (vf), transverse topographic system (t), hypsometric integral (hi...

ژورنال: کواترنری ایران 2018
Aali, Abolfazl , Pollard, Mark , Vahdati nasab, Hamed,

Modern plate tectonic theory, the development of earthquake prediction and the mitigation of earthquake hazards are based on the study of earthquakes during the twentieth century. Investigation of earthquakes over a much longer period, although in no way invalidating the global importance of plate tectonics, shows that patterns of seismic activity do change with time and that areas of intense s...

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