Solubility of sulfur in an ultramafic melt and the relevance of the system Fe-S-O

Shima, Hiromi; Naldrett, A. J.

doi:10.2113/gsecongeo.70.5.960

Cited by 122 publications

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“…Devolatilization of country rocks and incorporation of volatiles in the melt may lead to major and trace element, and isotopic systematics that are quite distinct from those that result from a partial melting mechanism. Haughton et al (1974), Shima and Naldrett (1975), Buchanan and Nolan (1979), and Danckwerth et al (1979) have determined that sulfide solubility is dependent on variables such as temperature, sulfur and oxygen fugacities, and melt composition. Clearly all of these variables may be affected by magma mixing or addition of volatiles to a melt.…”

Section: General Considerationsmentioning

confidence: 99%

“…In a dry system sulfur apparently dissolves in a mafic magma by displacing oxygen and bonding to metallic ions, principally Fe 2 + (Cu 2 +, Ni 2 +, etc. may also bond with sulfur, but their abundance is far less than Fe 2 +) (Fincham andRichardson 1954, Shima andNaldrett 1975 Haughton et al (1974) Irvine (1977) has also suggested that an increase in Si02 content of a melt, accompanied by magma mixing, may lead to sulfide saturation. Such a process is particularly important with respect to partial melting, as Si0 2 constitutes a low melting component in the partial fusion of crustal material.…”

Section: General Considerationsmentioning

confidence: 99%

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Application of Stable Isotopic Studies to Problems of Magmatic Sulfide Ore Genesis With Special Reference to the Duluth Complex, Minnesota

Ripley

1986

Special Publication No. 4 of the Society for Geology Applied to Mineral Deposits

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Analyses of the isotopic composition of S, C, 0, and H in mafic igneous rocks may provide valuable information regarding the extent of contamination by continental crust material. Partial melting and devolatilization of country rocks are important processes in the generation of many Cu -Ni deposits associated with mafic igneous rocks. Sulfur isotopes provide a means of evaluating the possibility of extraneous sulfur addition to a melt. Variability and distribution of o34g values may also provide data relating to the timing and mechanisms of sulfur production and incorporation into the melt. Oxygen, hydrogen, and carbon isotopes also can be sensitive indicators of isotopic contamination, whether by partial melting, devolatilization, or solid state exchange. Zones of contamination within an igneous sequence are likely to be areas where factors that control sulfide solubility (T, fS2, /°2, melt composition) have been perturbed, and are thus key sites for ore generation.Stable isotopic studies of two deposits within the Duluth Complex have highlighted the importance of country rock contamination in the generation of Cu -Ni ores. For the Dunka-Road deposit devolatilization of country rocks has resulted in essentially in situ contamination, and the formation of ore that is variable in both its spatial distribution and o34g values. Partial melting and major element contamination are restricted to areas near the margins of xenoliths. At the Babbitt deposit, contamination via both partial melting and devolatilization has been significant. Sulfur isotopic distribution between igneous and metasedimentary rocks suggests that sulfur must have been derived prior to or during magma ascent. Partial melting of country rocks and oxygen isotopic exchange may have occurred either before or after magma emplacement. Chemical diffusion, as well as fluid dynamic properties of mixing are thought to control the isotopic inhomogeneity that characterizes sulfide ore zones in the Duluth Complex.

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Section: General Considerationsmentioning

confidence: 99%

Section: General Considerationsmentioning

confidence: 99%

Application of Stable Isotopic Studies to Problems of Magmatic Sulfide Ore Genesis With Special Reference to the Duluth Complex, Minnesota

Ripley

1986

Special Publication No. 4 of the Society for Geology Applied to Mineral Deposits

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“…The "internal" sulfur, which originates from magmatic sulphides, immigrates during serpentinization (Shima and Naldrett, 1975;Donaldson, 1981;Seccombe et al, 1981). Sulfur can occur under reducing conditions from these magmatic sulphides (e.g., pentlandite, pyrrhotite) with the process of desulfurization, producing H2S, sulphides and alloys at temperatures of 365-445 o C. The produced H2S, reacts with the metallic elements that are released during the serpentinization of the silicate minerals and Ni-Fe-sulphides are produced.…”

Section: Introductionmentioning

confidence: 99%

Mineral Chemistry and Formation of Awaruite and Heazlewoodite in the Xerolivado Chrome Mine, Vourinos, Greece

Tzamos¹,

Filippidis²,

Michailidis³

et al. 2017

geosociety

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The Serpentinite between the chromite bodies 4 and 5 of Xerolivado mine (Vourinos, Greece), contains sparsely very small grains (<20μm) of awaruite (Fe0.91Cu0.06Co0.03Ni3), heazlewoodite (Ni2.91Fe0.06S2),. The olivine contains 0.40 wt% NiO and 6.91 (Fe0,91Cu0,06Co0,03Ni3), χεζλεγουδίτη (Ni2,91Fe0,06S2), μαγνητίτη και 79Fe2,98Co2,38S8 Περίληψη Ο σερπεντινίτης μεταξύ των χρωμιτικών σωμάτων 4 και 5 στο μεταλλείο Ξερολίβαδο (Βούρινος, Ελλάδα) περιέχει σποραδικούς πολύ μικρούς κόκκους (<20μm) αβαρουίτη

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“…The silicate melt composition is also an important factor in controlling sulfur solubility, and a large number of experiments of S solubility as a function of melt composition have been performed to determine the sulfur content at sulfide saturation (SCSS) in simple and natural magmatic systems (Shimazaki and Clark, 1973;Shima and Naldrett, 1975;Luhr et al, 1984;Rutherford, 1985, 1987;Luhr, 1990;O'Neill and Mavrogenes, 2002). The results show that sulfur solubilities in silicate melts are strongly dependent on FeO content under both anhydrous and hydrous conditions.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of Sulfur Solubility in Silicate Melts Coexisting with Graphite as a Function of Silicate Melt Composition

Tsujimura

Kitakaze

2005

Resource Geology

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Sulfur (S) solubility is determined in silicate melts, in particular with low-FeO content coexisting with graphite. In a high FeO range (>10 mol %), the S solubility is strongly dependent on the FeO content in silicate melt, which is in good agreement with previous works. In an intermediate FeO range (1~10 mol %), the S solubility in melts with a multi-component system is higher than that in melts with a simple system. The SKα shift of the electron microprobe shows the dissolve sulfur is all sulfide. A positive dependence is observed between CaO and S content in the melt undoped with FeO, but the dissolved sulfur is sulfate. The relationship between melt composition, S content, and S oxidation state is discussed.

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Solubility of sulfur in an ultramafic melt and the relevance of the system Fe-S-O

Cited by 122 publications

References 0 publications

Application of Stable Isotopic Studies to Problems of Magmatic Sulfide Ore Genesis With Special Reference to the Duluth Complex, Minnesota

Application of Stable Isotopic Studies to Problems of Magmatic Sulfide Ore Genesis With Special Reference to the Duluth Complex, Minnesota

Mineral Chemistry and Formation of Awaruite and Heazlewoodite in the Xerolivado Chrome Mine, Vourinos, Greece

Experimental Study of Sulfur Solubility in Silicate Melts Coexisting with Graphite as a Function of Silicate Melt Composition

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