نتایج جستجو برای: mineral assemblage
تعداد نتایج: 75039 فیلتر نتایج به سال:
برش مورد مطالعه در منطقه ی سه، در140 کیلومتری شمال اصفهان (جنوب کاشان) قراردارد. هدف از این تحقیق و مطالعه بررسی سنگ چینه نگاری و زیست چینه نگاری برش مورد مطالعه، شناسایی و رده بندی ماکروفسیل ها و میکروفسیل ها (فرامینی فرهای بنتیک) است. نهشته های این برش در میانه ی ناودیس سراکه با ناپیوستگی بر روی آهک های کرتاسه قرار گرفته اند و توسط تراس های جوان و دشت با رسوبات رسی، پوشیده شده اند. از دیدگاه ...
Ceramic findings from “Grotta dei Cocci” and dating back to the Early Neolithic were studied. The ceramic samples have been characterized by a combined use of Optical Microscopy (OM), X-ray Powder Diffraction (XRPD) Scanning Electron (SEM-EDAX) define mineralogical assemblage, estimate firing conditions provide information on raw materials used for production. results show that main mineral inc...
Giardia duodenalis is a widespread parasite of mammalian species, including humans. Fecal samples from sporadic human clinical cases of giardiasis in Western Australia were analysed at two loci; 18S rRNA and glutamate dehydrogenase (gdh), and G. duodenalis assemblage B isolates were identified in 75% of isolates. Sequence analyses of 124 isolates at the 18S rRNA locus identified 93 isolates as ...
Temporal variation in species abundances occurs in all ecological communities. Here, we explore the role that this temporal turnover plays in maintaining assemblage diversity. We investigate a three-decade time series of estuarine fishes and show that the abundances of the individual species fluctuate asynchronously around their mean levels. We then use a time-series modelling approach to exami...
introduction the avan cu-fe skarn is located at the southern margin of qaradagh batholith, about 60 km north of tabriz. the skarn-type metasomatic alteration is the result of qaradagh batholith intrusion into the upper cretaceous impure carbonates. the studied area belongs to the central iranian structural zone. in regional scale, the studied area is a part of the zangezour mineralization zone ...
The study is focused on metapelitic granulites of Cape Kaltygei (Western Baikal region) that contain a diagnostic mineral assemblage ultrahigh temperature (UHT) metamorphic rocks (orthopyroxene+sillimanite+quartz). pseudosection-based thermobarometry yields peak and pressure values (T=950 °C, P=~9 kbar) suggests near-isobaric cooling (IBC) conditions during the retrograde evolution granulites. ...
Jalal-Abad iron deposit is located about 38 km northwest of Zarand town in Kerman Province. It contains 200 Mt iron ore with average chemical composition of Fe = 45%, S =1.18% and P = 0.08%. Iron mineralization occurs in an Early Cambrian volcano–sedimentary sequence of Rizu series which is composed of sandy siltstone, siltstone, volcanoclastic rocks and dolomite. Small intrusive bodies of gab...
The suspended particle assemblage in complex coastal waters is a mixture of living phytoplankton, other autochthonous matter, and materials of terrestrial origin. The characterization of suspended particles is important for understanding regional primary productivity and rates of carbon sequestration, the fate of anthropogenic materials released to the coastal environment, as well as its effect...
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