نتایج جستجو برای: metaluminous composition

تعداد نتایج: 259845  

Journal: :Geological Journal 2022

The Ghohroud granitoids (GG), containing mafic microgranular enclaves (MMEs) are located in the central part of Urumieh-Dokhtar Magmatic Arc (UDMA) Iran. They associated with subduction-related magmatism Alpine-Himalayan orogenic belt. GG comprised a variety intermediate and felsic rocks, including tonalite, granodiorite, granite, diorite porphyry monzodiorite. MMEs gabbroic tonalite compositio...

Journal: :Contributions to Mineralogy and Petrology 2021

Abstract Crystallisation-driven differentiation is one fundamental mechanism proposed to control the compositional evolution of magmas. In this experimental study, we simulated polybaric fractional crystallisation mantle-derived arc Various pressure–temperature trajectories were explored cover a range potential magma ascent paths and investigate role decompression on phase equilibria liquid lin...

مظاهری, سید احمد, ملک‌زاده شفارودی, آزاده , کریم‌پور, محمد حسن,

The Maherabad gold-rich porphyry copper prospect area is located in the eastern part of Lut block, east of Iran. This is the first porphyry Cu-Au prospecting area which is discovered in eastern Iran. Fifteen mineralization-related intrusive rocks range (Middle Eocene 39 Ma) in composition from diorite to monzonite have been distinguished. Monzonitic porphyries had major role in Cu-Au mineraliza...

Journal: :Andean Geology 2021

Upper Cretaceous intrusives of limited extent crop out in the Coastal Cordillera near Valdivia (39º48’ S), 100 km west main topographic divide Andean Cordillera. Given that plutonic rocks same age at latitudes high Andes coastal emplaced a forearc position upper plate subduction setting. They correspond to hypabyssal displaying mainly porphyritic texture and lithological variations with microto...

Journal: :Journal of the Geological Survey of Brazil 2021

The Querari Complex corresponds to the basement rocks from Uaupes Domain and represents one of least studied units in northwest Rio Negro Province, Amazonian Craton. In this paper, we present new field geology, petrographic, geochemical data deformed granites Complex. Based on our results, suggest differentiation into two magmatic facies. Pana-Pana Facies comprise mainly porphyritic syeno monzo...

2013
J. R. Vidal - Solano R. Lozano Santa Cruz O. Zamora A. Mendoza - Cordova J. M. Stock

Chemical analyses conducted on the surface of rock slabs under a combination of two X-ray spectrometry methods, wavelength dispersive XRF and energy dispersive XRF, are used to establish a geochemical correlation between the studied samples. This proves to be an excellent method for the characterization of volcanic glasses, particularly when particles of exotic origin are present, because the e...

Journal: :Meteoritics & Planetary Science 2021

The IODP-ICDP Expedition 364 drilling recovered a 829 m core from Hole M0077A, sampling ˜600 of near continuous crystalline basement within the peak ring Chicxulub impact structure. bulk consists pervasively deformed, fractured, and shocked granite. Detailed geochemical investigations 41 granitoid samples, that is, major trace element contents, Sr–Nd isotopic ratios are presented here, providin...

Journal: :Minerals 2023

Controversy over the geodynamic interpretation of early Paleozoic granites in South China Block constrains understanding tectonic–magmatic evolution. In this paper, we present zircon U-Pb age, Hf isotope, and major trace element data Jilongjie region, south-central Hunan Province. A sample that yielded a weighted average 206Pb/238U age 425 ± 3 Ma falls into post-collisional granite field classi...

Journal: :The Japanese journal of veterinary research 1969
N Kumazawa R Yanagawa

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