نتایج جستجو برای: petrographical features
تعداد نتایج: 523530 فیلتر نتایج به سال:
Empirical Calibration for Dolomite Stoichiometry Calculation: Application on Triassic Muschelkalk-Lettenkohle Carbonates (French Jura) — This study concerns an approach for dolomite quantification and stoichiometry calculation by using X-ray diffractometry coupled with cell and Rietveld refinements and equipped with a newly substantial database of dolomite composition. A greater accuracy and pr...
this research is focused on facies distribution, palaeoecology and palaeoenvironment of the gurimember of the mishan formation in kuh-e shur and kuh-e kurdeh sections at the lar area, fars province.the guri member is composed of limestone, marly limestone and marl and the thickness at kuh-e shur andkuh-e kurdeh is about 72 and 110 meters, respectively. based on petrographical studies of 120 thi...
this study investigated the effects of planning on second-language written production with regard to task type. the participants were 75 iranian learners of english as a foreign language attending a private foreign language institution. they were asked to complete two different types of writing tasks (expository writing task and argumentative writing task) in different planned conditions (indiv...
تخمین سن انسان از روی تصاویر مشکلی است که اخیرا توجه زیادی را، بخاطر کاربردهای بیشمارش در بخش دیداری کامپیوتر به خود معطوف ساخته است، همچنین چالش هایی که نیازمند یک راه حل رضایت بخش می باشد، به علاوه چالش های آموزشی در دریافت تصاویر چهره تحت شرایط ظاهری غیر قابل کنترل از قبیل زاویه ها ی نوری متفاوت، تغییر در موقعیت ها و ژست ها، اثرات سنی در سیما و چهره که به فاکتور های زیادی مانند نحوه ی زندگی ...
The Paleogene volcanic rocks of Damash have a considerable outcrops in Alborz structural zone in Guilan Province. These volcanic rocks show a compositional range from olivine basalt, basaltic andesite, pyroxene andesite to andesite. The petrographical and geochemical studies indicate that the fractional crystallization of clinopyroxene and olivine play an important role in lithological varietie...
Fire clay of the Kabutarkuh deposit, located about 50 km southeast of Gonabad (Khorasan Province), was analyzed for its mineralogical and chemical compositions. Kaolinite, pyrophilite, quartz, dickite, gypsum, illite and alunite are the dominant minerals, and a minor phase of hematite is also present. Geochemical data show that the whole rock sample is mainly composed of SiO2, Al2O3 and K2O. Ch...
Abstract Late Cenozoic basaltic rocks in Nang Rong Columnar Jointed Basalts southern Khorat Plateau are among the greatest columnar basalts Thailand as famous geoheritage sites. This work aims to characterize and evaluate post-quarrying area by field investigation, petrography, geochemistry, geological engineering. A petrographical study determines these olivine basalts, presenting porphyritic ...
Gunung Kidul Regency is a highland consisting of carbonate rocks dominantly. Bedoyo village in Ponjong sub district has lot dolines, but the summer season, dolines become dry and could not be water storage. Geological mapping included geomorphological, rock observation, structural also petrographical analysis laboratory. A Geophysics survey to observe subsurface distribution laterally verticall...
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