نتایج جستجو برای: noorabad ophiolites

تعداد نتایج: 380  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شهید باهنر کرمان - دانشکده علوم زمین 1390

بازالت های افیولیت های صحنه از نوع تئولیتی و کالکوآلکالن بوده که به ترتیب از لحاظ موقعیت تکتونیکی در محدوده بازالتهای مورب های غنی شده و بازالتهای حوضه های پشت قوسی قرار می گیرند. این دو نوع بازالت میتوانند از ذوب بخشی متفاوت یک گوشته غنی شده با ترکیب اسپینل پریدوتیت حاصل شده باشند که در نوع بازالت های حوضه پشت قوسی افزوده شدن عناصری منشأ گرفته از متاسوماتیسم پوسته اقیانوسی فرورانده شده را نیز ...

The Khoy Ophiolitic Complex (KOC) as a part of Tethyan, Izmir-Ankara- Erzincan and Bitlis-Zagros sutures of South East (SE) Turkey is broadly exposed around Khoy region (NW Iran). This complex comprises dismembered fragments of mantle lithosphere, obducted oceanic lithosphere and parts of volcanic arc remnants. The Khoy Ophiolitic Complex can be structurally divided into two major eastern and w...

حاجی علی‌اوغلی, رباب, سودی اجیرلو, مجید, موذن, محسن,

The Kamyaran ophiolite complex as a part of the Kermanshah ophiolite is located in western Iran, along the Zagros orogeny and Neotethys suture zone. The Kamyaran ophiolite complex includes serpentinized harzburgites, isotropic and layered gabbros, diabasic dykes and pillow basalts. The diabasic dykes have experienced upper green schist facies metamorphism. Based on mineral chemistry of the diab...

سیاری, محمد, ترابی, قدرت , داودیان دهکردی, علیرضا, نوربهشت, ایرج ,

Eocene volcanic rocks of north Anarak area are as scattered as masses. These rocks cross the Anarak schists and Ashin-Zavar ophiolites but had not metamorphosed them. Their outcrops follow the direction of within the area faults. Mineralogicaly, these rocks are limited in composition from Andesi-Basalt and Andesite to Dacite. These rocks have phenocrysts of amphibole and plagioclase in microcry...

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Background: Lifestyle is a very important concept that is often used to express lifestyle. The purpose of this study is to determine the relationship between "lifestyle" and "professional ethics" of teachers. Method: The present study was conducted by descriptive-correlation method. The statistical population includes all primary school teachers in Noorabad (N=394), which through Morgan table,...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2011
Marie-Laure Pons Ghylaine Quitté Toshiyuki Fujii Minik T Rosing Bruno Reynard Frederic Moynier Chantal Douchet Francis Albarède

The Isua Supracrustal Belt, Greenland, of Early Archean age (3.81-3.70 Ga) represents the oldest crustal segment on Earth. Its complex lithology comprises an ophiolite-like unit and volcanic rocks reminiscent of boninites, which tie Isua supracrustals to an island arc environment. We here present zinc (Zn) isotope compositions measured on serpentinites and other rocks from the Isua supracrustal...

2005
Robert J. Stern

Earth is the only known planet with subduction zones and plate tectonics, and this fact demonstrates that special conditions are required for this mode of planetary heat loss. Sinking of cold, dense lithosphere in subduction zones is the principal plate-driving force, so plate tectonics could not have begun until Earth cooled sufficiently to allow lithosphere to collapse into the underlying ast...

2010
Ran Qin W. Roger Buck

Numerical models show that maximum dike width at oceanic spreading centers should scale with axial lithospheric thickness if the pre-diking horizontal stress is close to the Andersonian normal faulting stress and the stress is fully released in one dike intrusion. Dikes at slow-spreading ridges could be over 5 m wide and maximum dike width should decrease with increasing plate spreading rate. H...

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