Microstructure of a Pyrrhotite-pentlandite Intergrowth in Ll6 Saint-séverin
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چکیده
منابع مشابه
Pyrrhotite and Pentlandite in Ll3 to Ll6 Chondrites: Determining Compositional and Microstructural Indicators of Formation Conditions
Introduction: The compositions, textures, and crystal structures of sulfides can be used to constrain oxygen fugacity, aqueous, thermal, and cooling history [e.g., 1–5]. The most abundant sulfides in extraterrestrial samples are the pyrrhotite group [(Fe,Ni,Co,Cr)1– xS], which can occur with pentlandite [(Fe,Ni,Co,Cr)9– xS8]. The pyrrhotite group sulfides are largely nonstoichiometric and have ...
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Nickel producers have been using a number of different strategies, sometimes in combination, to reject pyrrhotite. These include raising the pH of flotation to partially suppress pyrrhotite floatability (73), introducing separate pyrrhotite rejection circuits which by and large also exploit the fact that pyrrhotite floats poorly in alkaline solutions, and using magnetic separation to remove pyr...
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Introduction Iron-nickel sulfides are found in most or all solar system environments, and are probably the only minerals found in all extraterrestrial materials on hand. Despite this ubiquity, they have only just begun the attention they deserve. The most common Fe-Ni sulfides in chondrites are troilite (FeS), pyrrhotite (Fe 1-x S) and pentlandite (Fe,Ni) 9 S 8. Troilite is believed to have res...
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Introduction: It has been well documented that all of the CI1 chondrites have undergone extensive aqueous alteration, [1] which has modified the texture and composition of the minerals present. In this study, we look at the effect of aqueous alteration on Fe-Ni sulphides in four different CI1 chondrites, with a view to identifying variable degrees of aqueous alteration within CI1 chondrites. Me...
متن کاملTemperature effects on bacterial leaching of sulfide minerals in shake flask experiments.
The microbiological leaching of a sulfide ore sample was investigated in shake flask experiments. The ore sample contained pyrite, pyrrhotite, pentlandite, sphalerite, and chalcopyrite as the main sulfide minerals. The tests were performed at eight different temperatures in the range of 4 to 37 degrees C. The primary data were used for rate constant calculations, based on kinetic equations unde...
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تاریخ انتشار 2017