Solubility of Sulfur in Mafic Magmas

Haughton, D. R.; Roeder, P. L.; Skinner, Brian J.

doi:10.2113/gsecongeo.69.4.451

Cited by 473 publications

(203 citation statements)

References 0 publications

Supporting

Mentioning

189

Contrasting

Unclassified

Order By: Relevance

“…Calculated fO 2 for type II chondrules of Semarkona using the same olivine-iron metal-silicate melt (OSI) oxybarometer gives values in the range of 1 to -1.5 log units below the IW buffer curve (Yu and Hewins, 1998). Similarly, chromium solubility at chromite saturation (Roeder and Reynolds, 1991;Murck and Campbell, 1986;Ariskin and Nikolaev, 1996) together with sulfur solubility at sulfide saturation (Haughton et al, 1974;O'Neil and Mavrogenes, 2002) which are both dependent on oxygen fugacity, hint at redox conditions up to IW+1 for the formation of type IIA chondrules in ordinary chondrites.…”

Section: Redox Conditions During Chondrule Formationmentioning

confidence: 99%

Relationships between type I and type II chondrules: Implications on chondrule formation processes

Villeneuve

Libourel

Soulié

2015

Geochimica et Cosmochimica Acta

View full text Add to dashboard Cite

Please cite this article as: Villeneuve, J., Libourel, G., Soulié, C., Relationships between type I and type II chondrules: Implications on chondrule formation processes, Geochimica et Cosmochimica Acta (2015), doi: http://dx.doi.org/ 10.1016/j.gca. 2015.03.033 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.

show abstract

Section: Redox Conditions During Chondrule Formationmentioning

confidence: 99%

Relationships between type I and type II chondrules: Implications on chondrule formation processes

Villeneuve

Libourel

Soulié

2015

Geochimica et Cosmochimica Acta

View full text Add to dashboard Cite

show abstract

“…where S SCSS is the sulfur content of the silicate melt at sulfide saturation and C S is a pseudoequilibrium constant (sulfide capacity) controlled by silicate liquid composition (Haughton et al, 1974;O'Neill and Mavrogenes, 2002):…”

Section: Modeling Sulfur Solubility In Silicate Meltsmentioning

confidence: 99%

“…(6)) was only calibrated for simplified systems and FeO-rich terrestrial basalts (Haughton et al, 1974;O'Neill and Mavrogenes, 2002); (2) a robust application of Eq. (9) not only requires an accurate determination of silicate melt compositions but also expressions accounting for the evolution of the activity coefficients (γ ) of divalent cations under highly reducing conditions.…”

Section: Modeling Sulfur Solubility In Silicate Meltsmentioning

confidence: 99%

Sulfur solubility in reduced mafic silicate melts: Implications for the speciation and distribution of sulfur on Mercury

Namur

Charlier

Holtz

et al. 2016

Earth and Planetary Science Letters

118

160

View full text Add to dashboard Cite

Chemical data from the MESSENGER spacecraft revealed that surface rocks on Mercury are unusually enriched in sulfur compared to samples from other terrestrial planets. In order to understand the speciation and distribution of sulfur on Mercury, we performed high temperature (1200-1750 • C), lowto high-pressure (1 bar to 4 GPa) experiments on compositions representative of Mercurian lavas and on the silicate composition of an enstatite chondrite. We equilibrated silicate melts with sulfide and metallic melts under highly reducing conditions (IW-1.5 to IW-9.4; IW = iron-wüstite oxygen fugacity buffer). Under these oxygen fugacity conditions, sulfur dissolves in the silicate melt as S 2− and forms complexes with Fe 2+ , Mg 2+ and Ca 2+ . The sulfur concentration in silicate melts at sulfide saturation (SCSS) increases with increasing reducing conditions (from <1 wt.% S at IW-2 to >10 wt.% S at IW-8) and with increasing temperature. Metallic melts have a low sulfur content which decreases from 3 wt.% at IW-2 to 0 wt.% at IW-9. We developed an empirical parameterization to predict SCSS in Mercurian magmas as a function of oxygen fugacity ( f O 2 ), temperature, pressure and silicate melt composition. SCSS being not strictly a redox reaction, our expression is fully valid for magmatic systems containing a metal phase. Using physical constraints of the Mercurian mantle and magmas as well as our experimental results, we suggest that basalts on Mercury were free of sulfide globules when they erupted. The high sulfur contents revealed by MESSENGER result from the high sulfur solubility in silicate melt at reducing conditions. We make the realistic assumption that the oxygen fugacity of mantle rocks was set during equilibration of the magma ocean with the core and/or that the mantle contains a minor metal phase and combine our parameterization of SCSS with chemical data from MESSENGER to constrain the oxygen fugacity of Mercury's interior to IW-5.4 ± 0.4. We also calculate that the mantle of Mercury contains 7-11 wt.% S and that the metallic core of the planet has little sulfur (<1.5 wt.% S). The external part of the Mercurian core is likely to be made up of a thin (<90 km) FeS layer.

show abstract

“…These features are also shown by the samples of this study, although the small number of samples makes it difficult to define clear trends. The different fractionation trends have been attributed to an increase of SiO 2 in the magma during assimilation of country rock, which promotes the crystallization of orthopyroxene (Haughton et al, 1974). The assimilation also increases the Al 2 O 3 /CaO ratio in magma, which in turn favours the crystallization of plagioclase instead of clinopyroxene.…”

Section: Geochemistry Of the Intrusionsmentioning

confidence: 99%

Sm-Nd data for mafic-ultramafic intrusions in the Svecofennian (1.88 Ga) Kotalahti Nickel Belt, Finland - Implications for crustal contamination at the Archaean/Proterozoic boundary

Makkonen¹,

Huhma²

2007

Bull Geol Soc Finland

View full text Add to dashboard Cite

Sm-Nd data were determined for eight mafic-ultramafic intrusions from the Svecofennian (1.88 Ga) Kotalahti Nickel Belt, Finland. The intrusions represent both mineralized and barren types and are located at varying distances from the Archaean/Proterozoic boundary. The samples for the 23 Sm-Nd isotope analyses were taken mostly from the ultramafic differentiates. Results show a range in initial ε Nd values at 1880 Ma from -2.4 to +2.0. No relaNo relationship can be found between the degree of Ni mineralization and initial ε Nd values, while a correlation with the geological domain and country rocks is evident. The Majasaari and Törmälä intrusions, which have positive ε Nd values, were emplaced within the Svecofennian domain in proximity to 1.92 Ga tonalitic gneisses, which have previously yielded initial ε Nd values of ca. +3. In contrast, the Luusniemi intrusion, which has an ε Nd value of -2.4 is situated close to exposed Archaean crust. Excluding two analyses from the Rytky intruArchaean crust. Excluding two analyses from the Rytky intru-. Excluding two analyses from the Rytky intrusion, all data from the Koirus N, Koirus S, Kotalahti, Rytky and Kylmälahti intrusions, within error limits, fall in the range -0.7 ± 0.3. The results support the concept of contamination by Archaean material in proximity to the currently exposed craton margin. The composition of the proposed parental magma for the intrusions is close to EMORB, with initial ε Nd values near +4.

show abstract

Solubility of Sulfur in Mafic Magmas

Cited by 473 publications

References 0 publications

Relationships between type I and type II chondrules: Implications on chondrule formation processes

Relationships between type I and type II chondrules: Implications on chondrule formation processes

Sulfur solubility in reduced mafic silicate melts: Implications for the speciation and distribution of sulfur on Mercury

Sm-Nd data for mafic-ultramafic intrusions in the Svecofennian (1.88 Ga) Kotalahti Nickel Belt, Finland - Implications for crustal contamination at the Archaean/Proterozoic boundary

Contact Info

Product

Resources

About