نتایج جستجو برای: arc type magmatism

تعداد نتایج: 1376300  

Journal: :Journal of the Japan Welding Society 1959

M. Arvin

The lower to middle Miocene Chenar granitoid stock, a part of Central Iranian volcanic belt, is intruded into Eocene volcano-sedimentary complex in northwestern Kerman in south Central Iran. The Chenar granitoid stock consists mainly of coarse to medium grain granodiorite and monzogranite with subordinate tonalite and syenogranite. Alkali granites as aplitic veins and quartz dioritic dykes freq...

Journal: :Tectonics 2021

The Cenozoic Sulu Sea arc-basin system is situated in the tectonic junction between South China (SCS), northern Borneo, Palawan Continental Terrane, Philippine Mobile Belt, and Celebes Sea. We compare new/published geochronological geochemical data from across circum-Sulu region, summarize seven major magmatic phases Middle Eocene to Pleistocene. (42.65 Ma) Sabah ophiolite Eocene-Oligocene (34-...

Journal: :Tectonophysics 2022

The timing and mechanism of the combination between South China Block (SCB) Indochina (IB) are controversial. Three ophiolitic mélange zones (Ailaoshan, Song Ma, Chay) have been proposed as suture within this collisional orogen. However, relationships among three corresponding tectonic belts unclear. In study, we present detailed structural data for belts. bulk architectures Ailaoshan, Chay cor...

Journal: :Nature Communications 2021

Abstract The magmatic character of early subduction zone and arc development is unlike mature systems. Low-Ti-K tholeiitic basalts boninites dominate the Izu-Bonin-Mariana (IBM) system. Basalts recovered from Amami Sankaku Basin (ASB), underlying located west IBM’s oldest remnant arc, erupted at ~49 Ma. This was 3 million years after inception (51-52 Ma) represented by forearc basalt (FAB), tip...

2015
James B. Chapman Mihai N. Ducea Peter G. DeCelles Lucia Profeta

Global compilations indicate that the geochemistry of arc magmatism is sensitive to Moho depth. Magmatic products are prevalent throughout the history of Cordilleran orogenesis and can be employed to constrain the timing of changes in crustal thickness as well as the magnitude of those changes. We investigate temporal variations in crustal thickness in the United States Cordillera using Sr/Y fr...

Journal: :Journal of South American Earth Sciences 2021

The Guajira Arch is located in the northernmost portion of South America and holds record several stages magmatism metamorphism. We performed LA-ICP-MS U–Pb zircon geochronology coupled with Lu–Hf isotope geochemistry on 11 samples from a high-grade gneissic basement hosting interleaved complexes younger meta-granitoids meta-sediments to unravel its tectono-metamorphic evolution. oldest rocks c...

Journal: :International Geology Review 2022

Detrital zircon populations of the South Qiangtang terrane (SQT) provide vital information for reconstructing Tethyan evolution Tibetan Plateau but are obscured by undefined affiliation detrital samples and superimposition multiple tectonothermal events. We outlined SQT based on geological mapping collated Cambrian-Triassic to investigate representative populations. Although diachronous strata ...

Journal: :Boletín Geológico 2022

This work presents a considerable volume of new and compiled data indicating that arc magmatism in the western paleomargin Gondwana began Carboniferous continued during Permian Early Triassic. Subsequently, reactivated Middle Jurassic due to subduction Farallon Plate under continental paleomargin. The pluton belts are distributed from edge toward interior continent same orientation as slab (wes...

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