نتایج جستجو برای: fractured rocks by fault

تعداد نتایج: 7096324  

ترکیان, اشرف,

The studied shear zone is located in E-Qorveh (Kurdistan). The rocks of this zone are granite and granodiorite in composition. In present paper, deformed rocks, protomylonites and mylonites, are investigated in Sangin-Abad, Koh-e-Gazgaz and Poloserkan areas. Petrographic studies show that evidence of tectonic activities are such as myrmekite, recrystallized and slide alkali feldspars, fractured...

ژورنال: کواترنری ایران 2019
Rahimi, Habib, Aliyannezhadi, Abbas, Kimiagar, Salimeh, Mehrnia, Seyyed Reza , Sadrmohammadi, Nasrin,

Abstract In this research, Geophysical methods Ground Penetration Radar (GPR) and Geoelectric have been used to detect hidden Quaternary faults in alluvial sediments located southwest of Chitgar Forest Park (District 22 of Tehran). The study of profiles (GPR) identified areas such as fault. The results obtained from two Geoelectric profiles indicate that there are two zones with low electrical...

The Cenozoic volcanic activity of the Harrat Ash Sham volcanic field in south of Syria is a part of the extensive magmatism that took place in the auxiliary extension faults along the Dead Sea Fault Zone from upper Eocene to Holocene. Pliocene volcanic rocks form an important part of igneous succession in Syrian Part of Harrat as Sham. These rocks vary from basalts flows to scoria. Pliocene bas...

Hassan Haji Hosseinlou

Metamorphic and various intrusive rocks in the Urmia area are located in a transpressed active continental margin. These complexes in the Zagros orogen were deformed during an oblique convergence scenario between the Arabian and Sanandaj–Sirjan blocks in NW Iran. The Urmia area contains both NW-SE striking dextral strike-slip and SW verging NE dipping ductile reverse shear fabrics. Ductile shea...

محمدی, سید سعید, نخعی, ملیحه, رسا, ایرج , سمیعی, سمیه ,

Tertiary acidic to intermediate volcanic activities and the role of fault zones in Sarbisheh area have provided suitable conditions for the formation of bentonite, especially in pyroclastic deposits. Southeast Gondakan, Kalateh Pedaran, Golab, Golestan, Asfich, Hasan Kolangi, and Kangan bentonites in 1/100000 geological map of Sarbisheh were selected as the case study. Satellite image processin...

خلیلی, محمود , مکی‌زاده, محمدعلی , نقره‌‌ئیان, موسی , پارساپور, انیس ,

The study area is a part of central Iranian Cenozoic magmatic belt. The dominant rock type in the area is rhyodacite with Eocene in age. These rocks have been effected by Qum-Zefreh fault as well as alteration by hydrothermal solutions. Due to sulfate - acid alteration, the following  minerals are formed: pyrite + alkali feldspar + sericite + pyrophyllite + barite+  jarosite + hematite + quartz...

2004
Henry C. Fricke James R. O'Neil

Stable isotope analyses of rocks and minerals associated with the detachment fault and underlying mylonite zone exposed at Secret Creek gorge and other localities in the Ruby-East Humboldt Range metamorphic core complex in northeastern Nevada provide convincing evidence for meteoric water infiltration during mylonitization. Whole-rock 6180 values of the lower plate quartzite mylonites (>95% mod...

2014
Grzegorz Kwiatek T. H. W. Goebel Georg Dresen

The formation of fault damage due to slip under high normal stresses can rarely be monitored under in situ conditions. To advance our understanding of microfracture processes, we investigated stick-slip events on Westerly granite samples containing the following: (1) a planar saw cut fault and (2) a fault developed from a fresh fracture surface. We examined temporal changes of seismic moment te...

Journal: :Journal of Rock Mechanics and Geotechnical Engineering 2018

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