نتایج جستجو برای: alkaline rocks
تعداد نتایج: 64205 فیلتر نتایج به سال:
arghash – ghasem-abad area in ne iran is located in the rim of the sabzevar structural zone. tertiary outcrops include granite and quartz monzodiorite porphyry associated with dacite and andesite volcanic rocks. in the study area, quartz gabbro and quartz monzodiorite dykes intruded the older rocks. granite and volcanic rocks host au-sb-bearing quartz-calcite veins. mineralized veins are mainly...
The study area is located in Khorasan Razavi Province, NW Gonabad and based on tectonic setting, it is situated in the north of Lut Block zone. Subvolcanic bodies intruded the andesitic lava flows and the pyroclastics rocks. These intrusive bodies consist of small stocks and dykes with composition from quartz diorite, monzodiorite to granite. Widespread alteration identified in southern region ...
Eocene volcanic rocks in SW of Choupanan are exposed along the Choupanan fault as lava with andesite, trachyandesite to dacite composition and pyroclastic rocks. This area is a part of Central Iran (Yazd block). Andesite is the most predominant rock unit of the area and is composed of feldspars (andesine, oligoclase, and sanidine), amphibole (magnesio hastingsite, magnesian hastingsite, magnesi...
Outcrops of the Upper Ordovician igneous rocks, as basaltic lava and microgabbroic dyke and sill, present within the Abarsej and Ghelli formations in north and southwest of Shahrood. These rocks have basaltic, trachybasaltic and basaltic trachyandesitic composition with alkaline nature. Their parallel patterns on the primitive mantle and chondrite normalized spider diagrams indicate the common ...
In southwest of Birjand, the Tertiary igneous rocks have oxposed in Cretaceous flysch type deposits. These bodies are made of micro quartzmonzodiorite, trachyandesite, andesite and dacite. The main texture in these rocks is porphyry. Their phenocrysts are plagioclase, hornblende and biotite. Plagioclases contain zoning. Pyroxene, quartz and opaque minerals are in groundmass. Often, hornblendes ...
The plutonic body of Bostanabad-Meyaneh belt formed during the Cenozoic magmatism on the weast Alborz-Azarbaijan zone. The Oligocene plutonic rocks consist of alkaligranite, granodiorite and biotitegranite, intruded into the Eocene volcanic-sedimentary rocks. The predominant textures are granular, graphic and perthite. Geochemical evidence reveals that they are cogenetic and have features typic...
kuh-e-siah is located in the north of gavkhuni lagoon and east of the varzaneh (se of isfahan) and is a part of urumieh-dokhtar magmatic arc (udma). the volcanic rocks of this area are vesicular basalt and basaltic andesite with late miocene age. the most common textures of these rocks are porphyry, microlitic porphyritic, hyaloporphyric and vesicular. plagioclase, olivine and clinopyroxene are...
سنگ های آلکالن پالئوزوئیک، در قسمت شمال غرب خرد قاره شرق - ایران مرکزی در طول گسل های اصلی و فرعی رخنمون یافته اند. این سنگ های آلکالن، به دو صورت دگرگون شده (انارک: شیست آبی، چاه پلنگ: آمفیبولیت، و معراجی: شیست سبز) و دگرگون نشده (پلهاوند و بیاضه) یافت می شوند. اغلب نمونه ها، ترکیب بازالت آلکالن با کانی شناسی متنوع دارند. آمفیبول، فلدسپار، کلینوپیروکسن و الیوین از کانی های مهم و آپاتیت، تیتانی...
The Siyahmansour area is located between longitude 370 46َ 07" to 370 50َ 19" N and latitude 470 53ً 13" to 470 58َ 22" E in northeastern town of Miyaneh Exposure of different igneous rocks in the studied area including Eocene to Miocene volcanic rocks, granitoids and diorites. The granitoids are different including muscovite granites and granite-granodiorite. The muscovite granites are intruded in...
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