Thermochemical study of the system Fe-As-S

Barton, Paul B.

doi:10.1016/0016-7037(69)90031-3

Cited by 111 publications

(71 citation statements)

References 17 publications

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“…According to Barton (1969 and1971), the stability fields of the FeAs and FeSb 2 phases at 400°C (a maximal temperature for the ore association in Seinäjoki) lies between fs 2 = 10 17 and fs2 = 10 15 atm. These values are much lower than the sulphur fugacity at which, according to Barton, the mineral associations of sulphides of the »main line» ( Fig.…”

Section: Discussion On the Physical And Chemical Conditions Of Formatmentioning

confidence: 99%

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Associations of ore minerals in the deposits of the Seinäjoki district and the discussion on the ore formation

Borodaev¹,

Бортников²,

Mozgova³

et al. 1983

Bull Geol Soc Finland

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The mineral associations of the antimony deposits in the Seinä-joki region (Finland) are described on the basis of microprobe investigations. There are two ore associations: quartz-antimony and pyrrhotite-antimony. The latter is characterized by the presence of the new minerals seinäjokite and pääkkönenite first discovered in these deposits. The data obtained suggest that minerals were formed in the deposits under specific conditions: at relatively high temperatures for antimony deposition, and at extremely low sulphur fugacity for the hydrothermal process.

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Section: Discussion On the Physical And Chemical Conditions Of Formatmentioning

confidence: 99%

“…18. Diagram of sulphur activity -temperature for sulphurization reactions in systems Fe-As-S and Fe-Sb-S, from data provided by Barton (1969Barton ( , 1971. Reactions gud = po + ant and gud = po + FeSb 2 are shown schematically.…”

Section: Discussion On the Physical And Chemical Conditions Of Formatmentioning

confidence: 99%

Associations of ore minerals in the deposits of the Seinäjoki district and the discussion on the ore formation

Borodaev¹,

Бортников²,

Mozgova³

et al. 1983

Bull Geol Soc Finland

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“…Arsenopyrite is a refractory phase, which does not readily re-equilibrate during cooling, so its composition is sensitive to formation temperature or pressure (Clark 1960;Barton 1969;Scott 1983). Natural arsenopyrite itself can be 'non-stoichiometric', in that its composition can vary between FeAs 1.2 S 0.8 and FeAs 0.9 S 1.1 and arsenian arsenopyrite is commonly observed in hydrothermal ore deposits (e.g.…”

Section: Phase Relations and Formation Temperaturesmentioning

confidence: 99%

Mineralogy of the Silver King deposit, Omeo, Victoria

Birch¹

2017

Proc. R. Soc. Vic.

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ABSTRACT:The Silver King mine (also known as Forsyths) operated very intermittently between about 1911 and the late 1940s on Livingstone Creek, near Omeo, in northeastern Victoria. The deposit consists of six thin and discontinuous quartz lodes that are variably mineralised. Assays of up to 410 ounces of silver per ton were obtained but there are only a few recorded production figures. Examination of representative ore samples shows that the main silver-bearing minerals in the primary ore are pyrargyrite, freibergite, andorite and the rare sulphosalt zoubekite, which occur irregularly with pyrite, arsenopyrite, galena and sphalerite. Phase assemblage data indicate that crystallisation occurred over an interval from about 450°C to less than 250°C, with the silver-bearing minerals crystallising at the lowest temperatures. The lodes were formed by the emplacement of hydrothermal solutions into fractures within the Ensay Shear Zone during the Early Devonian Bindian Orogeny. There are similarities in mineralisation and timing of emplacement between the Silver King lodes and the quartz-reef-hosted Glen Wills and Sunnyside goldfields 35-40 km north of Omeo.

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“…However, the arsenopyrite is rich in sulphur relative to arsenic (see analysis 3, Table II) suggesting it crystallized at somewhat lower temperatures, possibly as low as 350 ~ (Clark, 1960). On the basis of limited data presented by Barton (1969), the composition of the Meerschaum sphalerite (Fe = 3.5 mole~) indicates a maximum temperature of about 280 ~ for the assemblage sphalerite-arsenopyrite (assuming equilibration).…”

Section: Silver Sulphosalts From the Meerschaum Minementioning

confidence: 99%

“…If equilibrium is assumed, then experimental work in the Fe-As-S system by Clark (1960) and Barton (1969) sets an upper limit of 491 ~ for mineralization in the ore vein. However, the arsenopyrite is rich in sulphur relative to arsenic (see analysis 3, Table II) suggesting it crystallized at somewhat lower temperatures, possibly as low as 350 ~ (Clark, 1960).…”

Section: Silver Sulphosalts From the Meerschaum Minementioning

confidence: 99%

Silver sulphosalts from the Meerschaum Mine, Mt. Wills, Victoria, Australia

Birch¹

1981

Mineral. mag.

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A rich vein of silver and silver-lead sulphosalt minerals was discovered in 1906 in the Meerschaum Mine, on the Sunnyside goldfield at Mt. Wills, in northeastern Victoria. Andorite, miargyrite, tetrahedrite (freibergite), owyheeite, and argentian gold are the main silver-bearing minerals present, and sphalerite, pyrite, arsenopyrite, and covelline also occur in the vein.The vein was probably emplaced under epithermal conditions from ore fluids accompanying the intrusion of the Mt. Wills granite. The main silver-bearing minerals were probably deposited at temperatures ranging from about 350 ° to below 300 °C.

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Thermochemical study of the system Fe-As-S

Cited by 111 publications

References 17 publications

Associations of ore minerals in the deposits of the Seinäjoki district and the discussion on the ore formation

Associations of ore minerals in the deposits of the Seinäjoki district and the discussion on the ore formation

Mineralogy of the Silver King deposit, Omeo, Victoria

Silver sulphosalts from the Meerschaum Mine, Mt. Wills, Victoria, Australia

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