نتایج جستجو برای: quartz crystals

تعداد نتایج: 67066  

ژورنال: بلورشناسی و کانی شناسی ایران 2012
رحیمی چاکدل, عزیر , پیتر بویل, آلن,

The present study investigates the shape preferred orientation (SPO) and crystal preferred orientation (CPO) of quartz crystals using electron backscatter diffraction (EBSD) in andalusite-cordierite schist from the Ythan Valley, Aberdeenshire, in the Scottish Dalradian block. Quartz crystals in the matrix and andalusite pophyroblasts have inequant to slightly equant shapes. Quartz crystals show...

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Journal: :geopersia 2014
aziz rahimi-chakdel

the present study investigates the crystal preferred orientation (cpo) of quartz crystals in psammitic rocks to ascertain the deformationmechanism using electron backscatter diffraction (ebsd) on quartz crystals from north of the renvyle-bofin slide (rbs) nearletterfrack in western ireland. complete crystallographic orientations were determined for several thousand individual quartz crystalsin ...

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2008

sq02_080825_terms_e Synthetic Quartz Crystal: A single crystal grown using the hydrothermal synthesis method. As-Grown Quartz Crystal: A synthetic quartz crystal grown naturally with no processing. Lumbered Quartz Crystal: A synthetic quartz crystal with the X and Z surfaces processed according to specified dimensions and angles using a diamond wheel #80. Y-bar Synthetic Quartz Crystal: A synth...

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Journal: Geopersia 2014
Aziz Rahimi-Chakdel,

The present study investigates the crystal preferred orientation (CPO) of quartz crystals in psammitic rocks to ascertain the deformationmechanism using electron backscatter diffraction (EBSD) on quartz crystals from north of the Renvyle-Bofin Slide (RBS) nearLetterfrack in western Ireland. Complete crystallographic orientations were determined for several thousand individual quartz crystalsin ...

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ژورنال: بلورشناسی و کانی شناسی ایران 2019
Bakhtiyari, behnaz, Davoudian Dehkordi, Alireza, Riyahi Samani, Fariba, Shabanian Boroujeni, Nahid,

The granitic gneisses of Abadchi village is located in the North of Zayandeh-Rud dam, where the area is a part of Sanandaj-Sirjan Zone. The mineralogical composition of the rocks is composed of quartz, plagioclase, K-feldspar, biotite, amphibole, muscovite, zircon, titanite and allanite. Quartz crystals, as the most abundant mineral constituents of these rocks, display the different conditions ...

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ژورنال: بلورشناسی و کانی شناسی ایران 2017
حاج علی اوغلی, رباب, رضاپور, محمدرضا, سیمونز, وارطان, موذن, محسن,

The Miocene Qohrud granitoid intrusion consists of granite, granodiorite and tonalite and is located in the Urmia-Dokhtar magmatic belt. Intrusion of magmatic rocks into the various sedimentary rocks including shale, sandstone, limestone and marl, with Jurassic to Eocene age, has caused contact metamorphism of the surrounded rocks. Varity of hornfelses and skarns are formed in this regards. Hyd...

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ژورنال: بلورشناسی و کانی شناسی ایران 2017
سرجوقیان, فاطمه, کاظمی, کاظم, کنعانیان, علی,

The Byarjomand Batholith with Pre-cambrian age in the north Semnan, north-central Iran, consists of granite, granodiorite, quartz monzodiorite and gabbrodiorite. These rocks have granular texture and occasionally granophyric, pertite and poicelitic textures. Crystal size distribution (CSD) studies can reveal magmatic processes. In order to determine volometric proportion, growth time and nuclea...

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2006
M. QASIM JAN

COLOURLESS, purple, and pink topaz and transparent quartz crystals have been found in calcite veins (with or without milky quartz) in calcareous rocks near Katlang (34 ~ 24' N, 72 ~ 6' E), Mardan district. The veins do not contain any fluorite nor the country rocks any topaz. The topaz and transparent quartz crystals are mostly broken and perfectly euhedral outlines are very rare. Refractive in...

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ژورنال: بلورشناسی و کانی شناسی ایران 2014
سرجوقیان, فاطمه, کاظمی, کاظم, کنعانیان, علی,

South Kiki granitoid intrusion is located north of Semnan Province, about 5 km south of the village of Kiki. This pluton emplaced wholly within the Jurassic sandstones with typical contact metamorphic aureole around their periphery. The plutonic rocks suffered high-temperature deformation with well-developed S-C fabrics along shear zones marginal to the intrusion. The pluton was subjected to...

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ژورنال: بلورشناسی و کانی شناسی ایران 2018
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...

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