نتایج جستجو برای: dykes

تعداد نتایج: 791  

ارجمندزاده, رضا, الماسی, علیرضا, فرانسیسکو سانتوز, ژوزه, کریم‌پور, محمدحسن,

On the basis of field studies, mafic-intermediate bodies of Kashmar are subdivided into the old series (often stocks of gabbro, diorite, quartz diorite/monzodiorite) and the new series (quartz monzodiorite swarm dykes). In terms of crosscutting relationships, old series has the age between oldest volcanic units (57 Ma) and Eocene granitoids (40 Ma), but the swarm dykes are attributed to the pos...

Journal: :Transactions of the Geological Society of London 1816

Journal: :Coastal Engineering Proceedings 1988

Journal: :Japanese Geotechnical Society Special Publication 2016

Journal: :Journal of mechanics of continua and mathematical sciences 2021

Journal: :SN applied sciences 2021

Abstract The Tikar plain is located on the Cameroon Central Shear Zone. It also part of North Equatorial Pan-African Belt. formed granitoids intruded in places by mafic and intermediate dykes. dykes are essentially banded gabbros composed plagioclases, pyroxenes, amphiboles, biotites opaques. Their textures range from porphyroblastic to porphyritic. monzonites monzodiorites characterized, respe...

Journal: :Communications earth & environment 2021

Abstract Porphyry-type deposits are the world’s main source of copper and molybdenum provide a large proportion gold other metals. However, mechanism by which mineralising fluids extracted from magmas transported upwards into ore-forming environment is not clearly understood. Here we use field, micro-textural geochemical techniques to investigate field relationships samples circa 8 km deep cros...

Journal: :Rapport Grønlands Geologiske Undersøgelse 1980

Journal: :Japanese Geotechnical Society Special Publication 2015

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