نتایج جستجو برای: arc type magmatism

تعداد نتایج: 1376300  

Journal: :Minerals 2022

Carboniferous magmatism in southwestern Iberia was continuously active for more than 60 m.y. during the development of Appalachian-Variscan belt North America, Africa and Western-Central Europe. This collisional orogen that records closure Rheic Ocean is essential to understanding late Paleozoic amalgamation Pangea supercontinent. However, oblique convergence between Laurussia Gondwana lasted f...

Journal: :Australian Journal of Earth Sciences 2023

The Clarke River Fault in northeast Queensland records an early Paleozoic history of subduction, accretion and continental suturing. Samples mafic–ultramafic rocks collected proximal to the record oceanic geochemical affinities comprise alteration assemblages consistent with ophiolitic origin. ca 456 Ma Falls Creek Tonalite a continental-arc signature was formed response long-lived subduction b...

2011
CATHY J. BUSBY

Extensional and transtensional continental arc basins preserve very thick, continuous sequences and are an important contributor to the growth of continents; therefore, it is important to understand how they evolve. In this chapter, I describe four continental arc basin types, using Mesozoic to Cenozoic case studies from the SW US: (1) early-stage, low-lying extensional; (2) early-stage, low-ly...

Journal: :Journal of geoscience, engineering, environment and technology 2022

The Muria-Peninsula is a Quaternary volcano located in the northern Sunda arc. Its activity was controlled under high potassic and very magma series resulting leucite-rich trachyte pyroxene-rich basaltic-andesite. It strato-type that composed of lava, breccia, tuff layers, some dikes have volcanic craters maars varying age composition. study area covering volcanoes Muria, Genuk, Patiayam. This ...

شیخ زکریایی, سید جمال, آسیابانها, عباس , شیرزادی, علیرضا , نصرآبادی, محسن ,

Ophiolitic belt of Northern Sabzevar is invaded by basic, intermediate and acidic post-ophiolitic magmtism as dome, dyke and cone. Microscopically, the texture of the studied samples is porphyric and trachytic. Phenocryst mostly consists of amphibole, feldspar and clinopyroxene. All researchers that have investigated basic to acidic post ophiolitic magmatism of northern Sabzevar have consensus ...

Mohammadi, , Yari, , Zarrinkoub, ,

The study area is located about 105 kilometers east of Sarbisheh in Southern Khorasan and in the Sistan suture zone. The magmatic rocks of this area are exposed as intrusive and sub volcanice including diorite, quartz diorite, porphyry quartz diorite and porphyry diorite with Oligocene- Miocene age. These rocks have granular, porphyry with fine- grained matrix, ophitic, intergranular and glomer...

تنها , علی, خانعلی زاده, علیرضا , صادقیان, محمود , قاسمی, حبیب ا.. ,

Neogene high silica adakitic domes of south Quchan, cropped out in the northern part of the Quchan-Esfarayen Cenozoic magmatic arc (north of Sabzevar ophiolitic and metamorphic belt). In this volcanic belt, magmatic activities has been started since Eocene (about 40 Ma ago) and continued to Plio-Pleistocene (about 2 Ma ago). The ages of volcanic rocks range from Eocene to Plio-Pleistocene from ...

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