نتایج جستجو برای: ophiolitic complex

تعداد نتایج: 784080  

عابدی, علیرضا,

Huntite mineral with formula CaMg3(C03}4 is a natural carbonatic material with rhombohedral system that its composition is between dolomite (CaMg(C03h) and magnesite. For the first time Huntite was found in American Nevada province, then in other places i,e. Poland, Hungary, France, Australia, Iran and Greece. According to thermOdynamic, Huntite forms in condition of low pressure and tcm...

Journal: :Mining, metallurgy & exploration 2022

Abstract This study focused on joint interpretation of the aeromagnetic and radiometric data to allocate describe structural elements mineralization zones such as uranium, gold, sulfide in Gebel Umm Tineidba its surroundings, Eastern Desert, Egypt. The region is covered by exposures Precambrian rocks gneisses, migmatites, ophiolitic mélange, metavolcanics, younger granites, Quaternary sedimenta...

Journal: : 2022

A 10 μm particle of cuprous gold was found in the phosphate-argillaceous matrix a three-layer Fe-Mn crust dredged from Guyot Alba Magellan Seamount (Pacific Ocean). The studied with scanning electron microscope at Institute Volcanology and Seismology, Far East Branch Russian Academy Sciences. is represented by an admixture platinum (up to 3.1 wt % Cu up 1.7 Pt). composition impurities suggests ...

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...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه کردستان - دانشکده علوم پایه 1391

رآیند ردوکس زوج nadh/nad+ که در بیش از 330 آنزیم دی هیدروژناز است در سال های اخیر از موضوعات مهم تحقیقاتی بوده که دارای کاربردهای تجزیه ای و زیستی است. در این کار ما از الکترود کربن شیشه ای اصلاح شده با نانوصفحات گرافن و کمپلکس روتنیوم شامل لیگاند 1و 10 -فنانترولین 5و 6- دی اون به عنوان بستری مناسب برای اکسایش الکتروکاتالیتیکی nadh بکار گرفته شده است. رفتار الکتروشیمی الکترود اصلاح شده به وسیله...

Journal: :Turkish Journal of Earth Sciences 2023

The Eastern Anatolian Plateau (EAP), approximately 2000 m above sea level, is located between the Pontides to north, Arabian Platform south, and Iranian east. It characterized by 6 km-thick Maastrichtian Quaternary volcano-sedimentary cover which unconformably overlies continental oceanic basement units. Overall, outcrops of pre-Maastrichtian are rare include both This led drastically different...

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