نتایج جستجو برای: metamorphism and igneous

تعداد نتایج: 16828157  

ژورنال: بلورشناسی و کانی شناسی ایران 2015
احمدی, علی, بیابانگرد, حبیب , غنجعلی پور, راضیه ,

Siah-Kamar hornfalses and skarns are located about 5Km east of Dehsalm and 85Km west of Nehbandan city, southeast of Birjand Province and east of Lut Block. This Skarn formed by injected Rigi granitoid (Eocene age) into limestone and sandstone (Upper Cratacious).  Rigi Mountain is mainly granodiorite in composition and contains plagioclase, quartz, hornbelend and biotite minerals. Geochemistry ...

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ژورنال: بلورشناسی و کانی شناسی ایران 2012
حاجی علی اوغلی, رباب ,

The Precambrian Takab complex consists of various metamorphic rocks including metabasites, metaultramafic rocks, calc-silicates and marbles which are metamorphosed under green schist to granulite facies. The pick metamorphic rocks are retrogressively metamorphosed during crustal exhumation related to pressure and temperature decreasing as well as H2O-rich fluid infiltrations. Retrograde metamor...

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2015
HARRISON BROWN

________________________________ _________ _ Introduction and acknowledgments __________________ _ Distribution of uranium and thorium in igneous rocks __ _ ~age 91 91 92 Processing ________________ ___ ___ ___ ______ _________ _ Energetics and ·cost ________________ ----------------Conclusions ______________________ ___ _______ ______ _ Page

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Journal: :Annals of the New York Academy of Sciences 1912

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ژورنال: بلورشناسی و کانی شناسی ایران 2011
وثوقی عابدینی, منصور , اله پور, اسماعیل , هویس آسبیشلر, ثریا, پورمعافی, سیدمحمد,

Extrusive igneous rocks are formed the main part of geological units in northeast region of Birjand. Investigation shows that these igneous rocks can be divided into rhyolitic, dacitic, andesitic and an especial group including basaltic andesite and basalts. In Later group that differ from the others according to geochemical and mineralogical characteristics, there are limited outcrops of high ...

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ژورنال: بلورشناسی و کانی شناسی ایران 2009
جوانمردی, مژگان, داودیان دهکردی, علیرضا ,

Eocene volcanic rocks in south of Asad Abad (north-east of Koohpayeh, Isfahan Province) experienced very low-grade metamorphism (hydrothermal metamorphism), resulting in prehnite, malachite, azurite, zeolite, quartz and calcite crystallization in cavities and fractures. Chlorite (brunsvigite) and amphibole (ferro-actinolite) appear on secondary phases. Augite and labradorite are two main minera...

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2017
A. M. Ruzicka K. L. Schepker

The Open University's repository of research publications and other research outputs Combined chemical-oxygen isotope study of large igneous inclusions in ordinary chondrites Conference Item (2016). Combined chemical-oxygen isotope study of large igneous inclusions in ordinary chondrites. For guidance on citations see FAQs. c [not recorded] Version: Version of Record Copyright and Moral Rights ...

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Journal: :زمین شناسی اقتصادی 0
عادل ساکی هوشنگ پورکاسب

the cheshin meta-calcareous rocks (permo triassic) in southeast hamedan outcrop in association with a variety of pelitic schists and hornfels rocks. the intrusion of the alvand batholith (jurassic age) into pelitic and calcareous host rocks has produced metamorphic rocks in the hamedan area (cheshin village). on the basis of the dominance of calcite/dolomite, silicate and ore minerals, the calc...

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Journal: :journal of sciences, islamic republic of iran 2012
j. izadyar

late neoproterozoic-early cambrian schists have been occurred in southwest of zanjan city from the soltanieh belt. the soltanieh belt in northwest of iran is uplifted basement of precambrian-paleozoic in main central iran zone and includes outcrops of precambrian, paleozoic and mesozoic formations. late neoproterozoic-early cambrian schists, the oldest stratigraphy unit in the region, consist o...

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ژورنال: بلورشناسی و کانی شناسی ایران 2008
مؤذن, محسن , مؤید, محسن, مجرد, منیر ,

On the basis of microstructural evidence it is clear that SMC metapelites have experienced at least two regional (RM1, RM2) and one contact metamorphism (CM). During RM2, several porphyroblasts including kyanite, andalusite, staurolite, cordierite, garnet and fibrous sillimanite have grown in the mica - schists. In order to estimate the PT condition of metamorphism of metapelites, we used catio...

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