نتایج جستجو برای: calc alkaline

تعداد نتایج: 43545  

Journal: :journal of sciences, islamic republic of iran 2009
s.z. hosseini

pleistocene basaltic lava flows, consisting of trachybasalt and basaltic trachyandesite, cover an area north-northwest of shahre-babak in southeastern iran. the whole rock chemistry indicates that the lavas are dominantly alkaline and mildly calc-alkaline. variation diagrams of sio2 with major and trace elements are consistent with fractional crystallization processes involving olivine, pyroxen...

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...

Journal: :Frontiers in Earth Science 2021

In northwestern Iran, magmatic activity occurred during three main intervals: The Cretaceous, Eocene, and Miocene-Quaternary. first two phases of are more consistent with arc-type magmatism on an active continental margin; whereas the last phase, which has calc-alkaline alkaline affinities, shows similarity to postcollisional magmatism. Magmatic belts mostly situated in northern eastern parts O...

Journal: :Andean Geology 2021

In this work, we present the results of a petrographic and geochemical study that involves seven Cenozoic plutons located in NS trending belt western Patagonia, south Chile Triple-Junction to east magmatic arc. Four were studied northern end, three southern part belt. The characteristics (major trace element contents, eNdt, 87Sr/86Sr initial ratios), these are different enough propose further c...

Journal: :زمین شناسی اقتصادی 0
فرید مر صالح دیمر بتول تقی پور

most skarn deposits are directly related to magmatic activity, and there is a systematic correlation between composition of causative plutons and the metal contents of the related skarns. darreh zerreshk deposit is located in southwest of yazd. petrological and geochemical studies show that darreh zerreshk granitoid ranges in composition from granite through quartz monzodiorite and has subalkal...

Journal: :Minerals 2021

The Ossa-Morena Zone (OMZ), SW Iberia, has numerous Lower Carboniferous compositionally zoned plutons that formed in a Variscan intra-orogenic extensional setting. This magmatism shows wide compositional variation comprising alkaline, transitional, and calc-alkaline suites. suite was produced by hybridization of alkaline magmas with felsic melts generated crustal anatexis related to the intrusi...

2011
Arash Sharifi

The area of Esfordi-Zarigan in Central Iran is located in Bafq metallogenic province where most the rock units belong to Precambrian, Infracambrian and Cambrian periods. Although the sedimentary and volcanic rocks are widely distributed, this research is mainly focused on petrogenesis of plutonic rocks. From stratigraphic point of view sedimentary and volcanic rocks can be classified in five ma...

قاسمی, حبیب ا..., کرد, مالک, خانعلی زاده, علیرضا , صادقیان, محمود,

Ellipsoidal huge granitoidic batholiths of Zahedan, with NW-SE trending, located in south of this city which is intruded in low metamorphosed Eocene flysches (eastern Iran flysch zone). This batholith has two compositional terms: an extensive intermediate-acid term includes diorite - granodiorite with igneous source (I- type origin) and a low extent crustal and hybrid origin acidic term (H-type...

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