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Phase relations in the Cu-Fe-Zn-S system between 500 degrees and 300 degrees C under hydrothermal conditions
Phase relations in the Cu-Fe-Zn-S system were studied between 500 degrees and 300 degrees C using both the thermal gradient transport method and the isothermal in situ recrystallization method underExpand
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High form of pentlandite and its thermal stability
The high-temperature form of pentlandite (Fe4.5Ni4.5S8) was found to be stable between 584 6 3 and 865 6 3 8C, breaking down into monosulfide solid solution and liquid at the later temperature. TheExpand
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Isothermal phase relations in the system Cu-Fe-S under hydrothermal conditions at 350 degrees C and 300 degrees C
The phase relations in the central portion of the Cu-Fe-S system were studied under hydrothermal conditions by the thermal gradient transport method. Isothermal sections at 350 degrees C and 300Expand
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K‐Ar Ages of Tin‐Polymetallic Mineralization in the Oruro Mining District, Central Bolivian Tin Belt
. K-Ar age determinations were carried out on vein- and rock-forming minerals from five vein-type tin-polymetallic ore deposits of the Oruro mining district in the central part of the Bolivian tinExpand
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Bulk compositions of intimate intergrowths of chalcopyrite and sphalerite and their genetic implications
To determine the bulk chemical compositions of chalcopyrite containing starlike sphalerite and sphalerite including dotlike chalcopyrite, specimens from various types of ore deposits in Japan wereExpand
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Solubility of sphalerite in aqueous sulfide solutions at temperatures between 25 and 240°c
Abstract In order to assess the role of zinc sulfide complexes in ore-forming solutions, the solubility of sphalerite was measured in NaOHH 2 S aqueous solutions of 0.0 to 3.0 m NaHS concentrationExpand
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A REVISION OF PHASE RELATIONS IN THE SYSTEM Fe–Ni–S FROM 650° TO 450°C
An elongate field of high-form pentlandite solid-solution, Fe 5.65 Ni 3.35 S 7.85 , β 2 (Ni 4± x S 3 ), occurs in the system Fe–Ni–S at 650°C. This solid solution coexists with monosulfideExpand
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THE PHASE RELATIONS BETWEEN Fe4.5Ni4.5S8 AND Co9S8 IN THE SYSTEM Fe–Ni–Co–S AT TEMPERATURES FROM 400° TO 1100°C
Nous avons etudie les relations de phases du sous-systeme Fe 4 . 5 Ni 4 . 5 S 8 -Co 9 S 8 dans le systeme Fe-Ni-Co-S en utilisant les syntheses avec tubes de silice evacues et scelles. Nous avonsExpand
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Synthesis of minerals in the Cu — Fe — Bi — S system under hydrothermal condition and their phase relations
Dans le systeme Cu — Fe — Bi — S, on a synthetise, sous conditions hydrothermales a 300 °C et 420 °C, par une methode de transport par gradient de temperature avec des tubes en or, des solutionsExpand
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