نتایج جستجو برای: sahneh ophiolites

تعداد نتایج: 388  

مرادپور, علی, زارعی سهامیه, رضا ,

Ophiolites of the Zagros orogenic belt are part of the Tethys ophiolites, because of their geographical locations and link the Middle East ophiolites and other Asian ophiolites (e.g. Pakistani and Tibetan) to the Mediterranean ophiolites (e.g. Troodos , Greek and East European). The nature of the Harsin- Sahneh ophiolite (Kermanshah) traditionally identified as one of the Mesozoic southern bran...

2006
ÖMER FARUK ÇELİK MICHEL DELALOYE

The Tauride Belt Ophiolites in southern Turkey are located on both sides of the E–Wtrending, Mesozoic Tauride carbonate platform. They comprise the Lycian, Antalya, Beyşehir, Mersin, Alihoca and Pozantı-Karsantı ophiolites from west to east. Each ophiolite has a metamorphic rock unit either at the base of the peridotites or in the mélange units. The metamorphic sole rocks generally consist of a...

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 ...

2015
Yildirim Dilek Harald Furnes

Ophiolites are the remnants of ancient oceanic crust and upper mantle that were tectonically emplaced into continental margins. They display the only evidence for magmatic, tectonic, and hydrothermal processes associated with seafl oor spreading prior to 170 Ma because no oceanic lithosphere older than this age is preserved in the modern oceans. The occurrence of sheeted dikes, side-byside tabu...

2010
R. A. HARRIS

Integration of data from field. geochemistry, and radiometric age invcstigations of the active Banda arc-Australia collision zonc (Banda orogen) and· the Jurassic Brooks Range ophiolite provide ncw constraints for the origin and emplacement of Oman-type ophiolites. These ophiolites arc characterized by ultramafic residuals and mafic products that arc chemically modified by "anous dcgrees of pan...

2004
Martin Menzies Cameron Allen

The ophiolites of Othris, northern Greece, and Troodos, Cyprus, are of mixed lherzolite-harzburgite and harzburgite sub-type respectively. Within both ophiolites an entire spectrum of harzburgite, plagioclase harzburgite, lhcrzolite and plagioclase lherzolite interpreted respectively as residual and highly, moderately and slightly modified upper mantle has been recognised. Plagioclase lherzolit...

2007
RON HARRIS

Analysis of spatial, temporal, geological and geochemical patterns of ophiolites in the Indonesian and New Guinea region indicates a strong correlation with marginal basin development and closure. The spatial distribution of ophiolites is mostly linked with marginal basin producing zones of oblique convergence and collision. Strain partitioning in these zones creates a series of ephemeral plate...

Journal: Geopersia 2018

The Kermanshah ophiolite complex is a part of the Mediterranean–Zagros–Oman Tethyan ophiolites, located in the structural–tectonic zone of western Iran in the northern part of the Zagros main thrust. Doleritic sheeted dykes are well exposed within the ophiolite in the south of Sahneh. These dykes contain high MgO, Na2O, low TiO2 (2O5, and K2O contents, and high FeOt/MgO and LILE/HFSE ratios. Th...

2004
Peter Kelemen

As the oceanic plates move apart at midocean ridges, rocks from Earth’s mantle, far below, rise to fill the void, mostly via slow plastic flow. As the rock approaches the top of its journey, however, partial melting occurs, so that the upper 6 kilometers of oceanic crust are composed of melts, which both erupt on the seafloor as lava and crystallize beneath the surface to form what are known as...

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