نتایج جستجو برای: jarosite precipitation
تعداد نتایج: 59486 فیلتر نتایج به سال:
[1] Atmospheric fronts are important for the day-to-day variability of weather in the midlatitudes, particularly during winter when extratropical storm-tracks are at their maximum intensity. Fronts are often associated with heavy rain, and strongly affect the local space-time distribution of rainfall. A recently developed objective front identification method that distinguishes between cold, wa...
Davy Faraday Research Laboratory, Royal Institution, Albermarle Street, London W1S 4BS, UK Research School of Earth Sciences at UCL-Birkbeck, Birkbeck, University of London, Malet Street, London, WC1E 7HX, UK Department of Mineralogy, The Natural History Museum, Cromwell Road, London, SW7 5BD, UK Now at Entec UK Ltd, Canon Court North, Abbey Lawn, Abbey Foregate, Shrewsbury, SY2 5DE, UK. Now at...
Strong evidence for evaporitic sulfate minerals such as gypsum and jarosite has recently been found on Mars. Although organic molecules are often codeposited with terrestrial evaporitic minerals, there have been no systematic investigations of organic components in sulfate minerals. We report here the detection of organic material, including amino acids and their amine degradation products, in ...
FROM JAROSITE AT MERIDIANI PLANUM TO GOETHITE AT GUSEV CRATER. G. Klingelhöfer, D.S. Rodionov , R.V. Morris, C. Schröder, P.A. de Souza, D.W. Ming, A.S. Yen, B. Bernhardt, F. Renz, I. Fleischer, T. Wdowiak, S.W. Squyres, and the Athena Science Team. Institut für Anorganische und Analytische Chemie, Johannes Gutenberg-Universität, Staudinger Weg 9, D-55128 Mainz, Germany, [email protected]...
The Baharieh kaolin deposit (east Kashmar, Khorasan Razavi Province) is the product of alteration of dacitic rocks (Eocene) and is located in the Khaf-Kashmar-Bardaskan metallogenic belt. Field observations show that the development of this deposit was controlled by the tectonic system of the area and the presence of silica cap is the most important geological feature of this deposit. Mineralog...
Jarosite residues produced by zinc hydrometallurgical processing are hazardous solid wastes. In this study, monoclinic pyrrhotite (M-Po) was prepared the pyrolysis of jarosite in H2S atmosphere. The influence gas speed, reaction temperature, and time considered. mineral phase, microstructure, elemental valence solids before after were analyzed using X-ray diffraction, scanning electron microsco...
We have developed two automated detectors that can recognize the sulfate mineral jarosite in unknown visible to near-infrared spectra (350– 2500 nm). The two detectors are optimized for use within the terrestrial and martian atmospheres. The detectors are built from Support Vector Machines trained using a generative model to create linear mixtures of library mineral spectra. Both detectors perf...
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