Edet Isuk - Profile on Academia.edu (original) (raw)
Related Authors
Uploads
Papers by Edet Isuk
Mossbauer Study of the Allende Meteorite
Meteoritics, 1984
Lithos, 1983
The effects of excess SiO2 and CO~ on the solubility of molybdetfite in hydrous sodium disilica~.... more The effects of excess SiO2 and CO~ on the solubility of molybdetfite in hydrous sodium disilica~.e melts were experimentally determined at 680 bars and 650°C. The molybdenite solubility decreases with increasing SiO2 and CO2. Under the experimental conditions, the MoS2 content of the vapor-saturated liquid decreases from 10 wt.% to 2.5 w!.% at SlOe saturation, la the presence of CO,, the solubility decreases to 4.6 wt.% MoS:: and becemes negligible at high Pco 2. These results are explained as deriving from the increased polymerization a~:~d hence aecreased NBO/Si ratio of the melt with increasing SiOz content and CO2, respectively. Sulfi~.r dissolves principally as SO£ 2 at the relatively high fo2 of the experiments. Consequently, the effect of sulfur is to lower the Mo solubility by effectively decreasing the NBO/Si ratio of the melt. Sulfur saturation is. therefore, likely to be a limiting factor in the Mo content of alkali silicate melts because of the chalcophile affinities of molybdenum.
Comment and Reply on “Transport and concentration of molybdenum in granite molybdenite systems: Effects of fluorine and sulfur”
Geology, 1984
... an accreting ferrane in the northern Gulf of Alaska" COMMENT George Plafker, US Geol... more ... an accreting ferrane in the northern Gulf of Alaska" COMMENT George Plafker, US Geological Survey, 345 Middlefleld Road, Menlo Park, California 94025 Bruns (1983a) has proposed a model that requires the Mesozoic part of the Yakutat block to have been plucked out of the ...
The system Na 2 Si 2 O 5-K 2 Si 2 O 5-MoS 2-H 2 O with implications for molybdenum transport in silicate melts
Economic Geology, 1981
Page 1. Economic Geolog Vol 76, 1981. pp 2222-2255 The System Na2Si205-K2Si205-MoS2-H20 with Imp... more Page 1. Economic Geolog Vol 76, 1981. pp 2222-2255 The System Na2Si205-K2Si205-MoS2-H20 with Implications for Molybdenum Transport in Silicate Melts EDET E. ISUK Department of Comprehensive Science, Morgan State University, Baltimore, Maryland 21239 ...
Mossbauer Study of the Allende Meteorite
Meteoritics, 1984
Lithos, 1983
The effects of excess SiO2 and CO~ on the solubility of molybdetfite in hydrous sodium disilica~.... more The effects of excess SiO2 and CO~ on the solubility of molybdetfite in hydrous sodium disilica~.e melts were experimentally determined at 680 bars and 650°C. The molybdenite solubility decreases with increasing SiO2 and CO2. Under the experimental conditions, the MoS2 content of the vapor-saturated liquid decreases from 10 wt.% to 2.5 w!.% at SlOe saturation, la the presence of CO,, the solubility decreases to 4.6 wt.% MoS:: and becemes negligible at high Pco 2. These results are explained as deriving from the increased polymerization a~:~d hence aecreased NBO/Si ratio of the melt with increasing SiOz content and CO2, respectively. Sulfi~.r dissolves principally as SO£ 2 at the relatively high fo2 of the experiments. Consequently, the effect of sulfur is to lower the Mo solubility by effectively decreasing the NBO/Si ratio of the melt. Sulfur saturation is. therefore, likely to be a limiting factor in the Mo content of alkali silicate melts because of the chalcophile affinities of molybdenum.
Comment and Reply on “Transport and concentration of molybdenum in granite molybdenite systems: Effects of fluorine and sulfur”
Geology, 1984
... an accreting ferrane in the northern Gulf of Alaska" COMMENT George Plafker, US Geol... more ... an accreting ferrane in the northern Gulf of Alaska" COMMENT George Plafker, US Geological Survey, 345 Middlefleld Road, Menlo Park, California 94025 Bruns (1983a) has proposed a model that requires the Mesozoic part of the Yakutat block to have been plucked out of the ...
The system Na 2 Si 2 O 5-K 2 Si 2 O 5-MoS 2-H 2 O with implications for molybdenum transport in silicate melts
Economic Geology, 1981
Page 1. Economic Geolog Vol 76, 1981. pp 2222-2255 The System Na2Si205-K2Si205-MoS2-H20 with Imp... more Page 1. Economic Geolog Vol 76, 1981. pp 2222-2255 The System Na2Si205-K2Si205-MoS2-H20 with Implications for Molybdenum Transport in Silicate Melts EDET E. ISUK Department of Comprehensive Science, Morgan State University, Baltimore, Maryland 21239 ...