نتایج جستجو برای: hematite and magnetite
تعداد نتایج: 16829021 فیلتر نتایج به سال:
Introduction: The second MER rover (Opportunity) landed on Meridiani Planum on January 24, 2004 inside a shallow crater. The science rational for the selection of the landing site centered on detection of the mineral hematite from martian orbit by the Mars Global Surveyor Thermal Emission Spectrometer (MGS-TES) [1,2]. Other smaller occurrences of hematite are in Aram Chaos and several isolated ...
Magnetization roasting followed by magnetic separation is considered an effective method for recovering iron minerals. As hematite and magnetite are the main concomitant constituents in ores, index after magnetization will be more optimized than with only hematite. In this research, mechanism of original improving ore reduction during process was explored using fines lump samples. Under optimum...
introduction the study area is located in the central part of the khaf- kashmar- bardaskan volcano-plotunic belt (briefly kkbb). several iocg deposits such as tanourjeh au-bearing magnetite deposit and kuh-e-zar specularite-rich au deposit have been explored in kkbb. geology, alteration, mineralization, geochemistry and fluid inclusion results in kashmar suggest the iocg type au-bearing magneti...
Magnetosomes are magnetite nanoparticles formed by biomineralization within magnetotactic bacteria. Although there have been numerous genetic and proteomic studies of the magnetosome-formation process, there have been only limited and inconclusive studies of mineral-phase evolution during the formation process, and no real-time studies of such processes have yet been performed. Thus, suggested ...
Introduction Epithermal deposits are usually found in association with near-surface magmatic-hydrothermal environments with volcanic rocks. According to studies, their formation depth is less than 1.5 km and the temperature for their formation is less than 300 ° C. Epithermal deposits are usually rich in gold to gold-silver and rich in silver and include low sulfide, medium sulfide and hig...
Dalam artikel ini digambarkan hematite nano partikel (lebih kecil dari 100 nm) telah berhasil disintesis dengan metode Sol-Gel menggunakan Ferri nitrat (Fe(NO 3 ) .9H 2 O) dan Ethylene glycol (C H 6 O sebagai prekursor pada temperature anil yang berbeda yaitu 200, 300 400 0 C. Nanopartikel magnetite diperoleh ditandai alat X-Ray difraksi (XRD), Scanning Electron Microscope (SEM), energi X-ray s...
Introduction: An enigma of Venusian mineralogy is the suggestion that Fe3+bearing minerals exist under the reducing conditions of the Venusian atmosphere. Analysis of the spectrophotometric data from the Venera 13 and 14 missions, combined with the laboratory reflectance spectral measurements of oxidized basalts at elevatedtemperatures, led to the suggestion that metastable hematite might exist...
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