1991
DOI: 10.1016/0016-7037(91)90091-i
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Solubility of gold in NaCl-and H2S-bearing aqueous solutions at 250–350°C

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Cited by 233 publications
(123 citation statements)
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“…Under the near-magmatic conditions typical of porphyry and related deposits, copper is transported as a chloride complex, most likely CuCl (Barnes, 1979). Gold, on the other hand, may be transported as either a bisulfide complex, most likely the neutral species HAu(HS)2 (Hayashi and Ohmoto, 1991), or as the chloride complex AuCl2~ (Seward, 1984). Recent experimental work (Hayashi and Ohmoto, 1991) has shown Hayashi and Ohmoto, 1991).…”
Section: Transport Of Gold and Copper In Porphyry Copper Enargite-pymentioning
confidence: 99%
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“…Under the near-magmatic conditions typical of porphyry and related deposits, copper is transported as a chloride complex, most likely CuCl (Barnes, 1979). Gold, on the other hand, may be transported as either a bisulfide complex, most likely the neutral species HAu(HS)2 (Hayashi and Ohmoto, 1991), or as the chloride complex AuCl2~ (Seward, 1984). Recent experimental work (Hayashi and Ohmoto, 1991) has shown Hayashi and Ohmoto, 1991).…”
Section: Transport Of Gold and Copper In Porphyry Copper Enargite-pymentioning
confidence: 99%
“…Gold, on the other hand, may be transported as either a bisulfide complex, most likely the neutral species HAu(HS)2 (Hayashi and Ohmoto, 1991), or as the chloride complex AuCl2~ (Seward, 1984). Recent experimental work (Hayashi and Ohmoto, 1991) has shown Hayashi and Ohmoto, 1991). At higher temperatures the solubility of AuCl2~ is substantially increased, whereas that for Au-bisulflde complexes is little changed.…”
Section: Transport Of Gold and Copper In Porphyry Copper Enargite-pymentioning
confidence: 99%
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“…The debate is chiefly about the roles of chloride and bisulfide complexes; considerable evidence from laboratory experiments indicates that high chloride concentrations allow transport of substantial amounts of base metals. Gold is best transported by bisulfide complexes except under very acidic conditions and high chloride concentrations (Hayashi and Ohmoto, 1993), which are not typical of epithermal systems. Epithermal ores elsewhere that have high base-metal contents, such as at Creede, Colorado, and Colqui, Peru, have relatively high salinities of 5-12 weigh percent NaCl equivalent, which possibly explain the base metals (Hayba and others, 1985).…”
Section: Transportmentioning
confidence: 99%