نتایج جستجو برای: dokhtar magmatic belt

تعداد نتایج: 21565  

Journal: :Geological Society of America Bulletin 2022

Abstract The Tianshan Range–Junggar Basin– Kalamaili Range system represents the southwestern Central Asian Orogenic Belt and is a natural laboratory for studying intracontinental deformation processes. Its current topography product of farfield effects Cenozoic India-Asia collision. However, Mesozoic topographic tectonic evolution Ranges their impacts on Junggar Basin remain enigmatic due to s...

Journal: :Minerals 2023

The Sandaozhuang super-large W-Mo deposit is located in the southern margin of North China Craton, within well-known East Qinling Mo mineralization belt, and one typical skarn-type deposits China. Based on EMPA LA-ICP-MS analyses, major trace elements were presented, mineral chemistry magnetite at various stages was discussed. Combining field observations, petrography, geochemical characteristi...

Journal: :Canadian Journal of Earth Sciences 2022

The Ellsworth belt is one of several fault-bounded blocks exposed along the southeastern coast Maine that formed within Ganderia. New ID-TIMS U–Pb geochronological data integrated with field relationships provide additional insights into timing magmatism and deformation in belt. deformed Lamoine Granite was selected for zircon analysis to: (i) establish protolith age; (ii) direct temporal const...

Journal: :Geological Society of America Bulletin 2022

Abstract Since the Paleozoic, tectonic evolutionary process of eastern Eurasia has been affected by at least three paleo-ocean regimes: Paleo-Asian Ocean, Mongol-Okhotsk and Paleo-Pacific Ocean. However, transition among these ocean regimes is not well understood. Recently, Heilongjiang Ocean was proposed to play an important role during from regime (and later Ocean) regime. Here we report on a...

حاجی علی اوغلی, رباب, رضاپور, محمدرضا, سیمونز, وارطان, موذن, محسن,

The Qohrud granitoid is a part of the Urmia-Dokhtar magmatic assemblage. The main rock types are Miocene granite and tonalite. The hydrothermal activities were effective due to intrusion. Hydrothermal activities were more intense in the southern part of the pluton. This has produced relatively large automorph quartz crystals. The alteration of the granitoid wall rocks was accompanied with alter...

جهانگیری, احمد, خضرلو, علی اکبر, عامل, نصیر, مؤید, محسن, گری گوایر, میشل,

Alkaline volcanic rocks of the northwest of Marand with Plio-Quaternary age are located in the northern part of Urumieh-Dokhtar Magmatic Arc. These rocks have a distinct enrichment in LILE and LREE and depletion in HFSE (such as Ta and Nb) and high Ba/Ta and Ba/Nb ratios, which are among the characteristics of subduction zones. The majority of hornblenditic autholiths and hornblenditic xenolith...

Asadi Harooni, hoshang, Sameti, Mona, Zamanian, Hasan,

The Kalchuye Cu-Au deposit is located in the central part of the Urumieh – Dokhtar magmatic arc. This mineralization is mainly hosted by diorite, quartz diorite and andesite rocks. The mineralization is characterized by chalcopyrite, pyrite, galena and magnetite in the hypogen stage followed by chalcocite, covellite, malachite and goethite in supergen stage. According to the geochemical studies...

Journal: :Precambrian Research 2022

The Karasjok–Central Lapland Greenstone Belt is one of the largest Palaeoproterozoic greenstone belts in Fennoscandian Shield and includes multiple (ultra)mafic intrusions, some with notable ore reserves, formed during three episodes at 2.44, 2.22 2.05 Ga. This study presents new mineralogical, geochronological isotopic data for Gállojávri ultramafic intrusion, Karasjok Belt, northern Norway. P...

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