Sulfur isotope fractionation in magmatic systems: Models of Rayleigh distillation and selective flux
Abstract The effect of Rayleigh distillation by outgassing of $ SO_{2} $ and $ H_{2} $S on the isotopic composition of sulfur remaining in silicate melts is quantitatively modelled. A threshold mole fraction of sulfur in sulfide component of the melts is reckoned to be of critical importance in shif...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Yongfei, Zheng [verfasserIn] |
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| Format: |
Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
1990 |
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| Schlagwörter: |
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| Anmerkung: |
© Institute of Geochemistry, Chinese Academy of Sciences 1990 |
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| Übergeordnetes Werk: |
Enthalten in: Chinese journal of geochemistry - Science in China Press, 1985, 9(1990), 1 vom: Jan., Seite 27-45 |
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| Übergeordnetes Werk: |
volume:9 ; year:1990 ; number:1 ; month:01 ; pages:27-45 |
| Links: |
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| DOI / URN: |
10.1007/BF02837946 |
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| Katalog-ID: |
OLC2088096620 |
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| 245 | 1 | 0 | |a Sulfur isotope fractionation in magmatic systems: Models of Rayleigh distillation and selective flux |
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| 520 | |a Abstract The effect of Rayleigh distillation by outgassing of $ SO_{2} $ and $ H_{2} $S on the isotopic composition of sulfur remaining in silicate melts is quantitatively modelled. A threshold mole fraction of sulfur in sulfide component of the melts is reckoned to be of critical importance in shifting the $ δ^{34} $S of the melts mith respect to the original magmas. The partial equilibrium fractionation in a magmatic system is evaluated by assuming that a non-equilibrium flux of sulfur occurs between magmatic volatiles and the melts, while an equilibrium fractionation is approached between sulfate and sulfide within the melts. The results show that under high$$f_{O_2 } $$ conditions, the sulfate/sulfide ratio in a melt tends to increase, and the $ δ^{34} $ S value of sulfur in a solidified rock might then be shifted in the positive direction. This may either be due to Rayleigh outgassing in case the mole fraction of sulfide is less than the threshold, or due to a unidirectional increase in $ δ^{34} $S value of the sulfate with decreasing temperature. Conversely, at low$$f_{O_2 } $$, the sulfate/sulfide ratio tends to decrease and the $ δ^{34} $S value of total sulfur could be driven in the negative direction, either because of the Rayleigh outgassing in case the mole fraction of sulfide is greater than the threshold, or because of a unidirectional decrease in $ δ^{34} $S value of the sulfide. To establish isotopic equilibrium between sulfate and sulfide, the HM, QFM or WM buffers in the magmatic system are suggested to provide the redox couple that could simultaneously reduce the sulfate and oxidize the sulfide. CaO present in the silicate melts is also called upon to participate in the chemical equilibrium between sulfate and sulfide. Consequently, the $ δ^{34} $S value of an igneous rock could considerably deviate from that of its original magma due to the influence of oxygen fugacity and temperature at the time of magma solidification. | ||
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10.1007/BF02837946 doi (DE-627)OLC2088096620 (DE-He213)BF02837946-p DE-627 ger DE-627 rakwb eng 550 540 VZ 13 ssgn Yongfei, Zheng verfasserin aut Sulfur isotope fractionation in magmatic systems: Models of Rayleigh distillation and selective flux 1990 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Institute of Geochemistry, Chinese Academy of Sciences 1990 Abstract The effect of Rayleigh distillation by outgassing of $ SO_{2} $ and $ H_{2} $S on the isotopic composition of sulfur remaining in silicate melts is quantitatively modelled. A threshold mole fraction of sulfur in sulfide component of the melts is reckoned to be of critical importance in shifting the $ δ^{34} $S of the melts mith respect to the original magmas. The partial equilibrium fractionation in a magmatic system is evaluated by assuming that a non-equilibrium flux of sulfur occurs between magmatic volatiles and the melts, while an equilibrium fractionation is approached between sulfate and sulfide within the melts. The results show that under high$$f_{O_2 } $$ conditions, the sulfate/sulfide ratio in a melt tends to increase, and the $ δ^{34} $ S value of sulfur in a solidified rock might then be shifted in the positive direction. This may either be due to Rayleigh outgassing in case the mole fraction of sulfide is less than the threshold, or due to a unidirectional increase in $ δ^{34} $S value of the sulfate with decreasing temperature. Conversely, at low$$f_{O_2 } $$, the sulfate/sulfide ratio tends to decrease and the $ δ^{34} $S value of total sulfur could be driven in the negative direction, either because of the Rayleigh outgassing in case the mole fraction of sulfide is greater than the threshold, or because of a unidirectional decrease in $ δ^{34} $S value of the sulfide. To establish isotopic equilibrium between sulfate and sulfide, the HM, QFM or WM buffers in the magmatic system are suggested to provide the redox couple that could simultaneously reduce the sulfate and oxidize the sulfide. CaO present in the silicate melts is also called upon to participate in the chemical equilibrium between sulfate and sulfide. Consequently, the $ δ^{34} $S value of an igneous rock could considerably deviate from that of its original magma due to the influence of oxygen fugacity and temperature at the time of magma solidification. Sulfide Oxygen Fugacity Sulfur Isotope Magmatic System Isotopic Equilibrium Enthalten in Chinese journal of geochemistry Science in China Press, 1985 9(1990), 1 vom: Jan., Seite 27-45 (DE-627)130963208 (DE-600)1066729-5 (DE-576)077051459 1000-9426 nnns volume:9 year:1990 number:1 month:01 pages:27-45 https://doi.org/10.1007/BF02837946 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-GEO SSG-OPC-GGO GBV_ILN_22 GBV_ILN_40 GBV_ILN_70 GBV_ILN_4012 AR 9 1990 1 01 27-45 |
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10.1007/BF02837946 doi (DE-627)OLC2088096620 (DE-He213)BF02837946-p DE-627 ger DE-627 rakwb eng 550 540 VZ 13 ssgn Yongfei, Zheng verfasserin aut Sulfur isotope fractionation in magmatic systems: Models of Rayleigh distillation and selective flux 1990 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Institute of Geochemistry, Chinese Academy of Sciences 1990 Abstract The effect of Rayleigh distillation by outgassing of $ SO_{2} $ and $ H_{2} $S on the isotopic composition of sulfur remaining in silicate melts is quantitatively modelled. A threshold mole fraction of sulfur in sulfide component of the melts is reckoned to be of critical importance in shifting the $ δ^{34} $S of the melts mith respect to the original magmas. The partial equilibrium fractionation in a magmatic system is evaluated by assuming that a non-equilibrium flux of sulfur occurs between magmatic volatiles and the melts, while an equilibrium fractionation is approached between sulfate and sulfide within the melts. The results show that under high$$f_{O_2 } $$ conditions, the sulfate/sulfide ratio in a melt tends to increase, and the $ δ^{34} $ S value of sulfur in a solidified rock might then be shifted in the positive direction. This may either be due to Rayleigh outgassing in case the mole fraction of sulfide is less than the threshold, or due to a unidirectional increase in $ δ^{34} $S value of the sulfate with decreasing temperature. Conversely, at low$$f_{O_2 } $$, the sulfate/sulfide ratio tends to decrease and the $ δ^{34} $S value of total sulfur could be driven in the negative direction, either because of the Rayleigh outgassing in case the mole fraction of sulfide is greater than the threshold, or because of a unidirectional decrease in $ δ^{34} $S value of the sulfide. To establish isotopic equilibrium between sulfate and sulfide, the HM, QFM or WM buffers in the magmatic system are suggested to provide the redox couple that could simultaneously reduce the sulfate and oxidize the sulfide. CaO present in the silicate melts is also called upon to participate in the chemical equilibrium between sulfate and sulfide. Consequently, the $ δ^{34} $S value of an igneous rock could considerably deviate from that of its original magma due to the influence of oxygen fugacity and temperature at the time of magma solidification. Sulfide Oxygen Fugacity Sulfur Isotope Magmatic System Isotopic Equilibrium Enthalten in Chinese journal of geochemistry Science in China Press, 1985 9(1990), 1 vom: Jan., Seite 27-45 (DE-627)130963208 (DE-600)1066729-5 (DE-576)077051459 1000-9426 nnns volume:9 year:1990 number:1 month:01 pages:27-45 https://doi.org/10.1007/BF02837946 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-GEO SSG-OPC-GGO GBV_ILN_22 GBV_ILN_40 GBV_ILN_70 GBV_ILN_4012 AR 9 1990 1 01 27-45 |
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10.1007/BF02837946 doi (DE-627)OLC2088096620 (DE-He213)BF02837946-p DE-627 ger DE-627 rakwb eng 550 540 VZ 13 ssgn Yongfei, Zheng verfasserin aut Sulfur isotope fractionation in magmatic systems: Models of Rayleigh distillation and selective flux 1990 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Institute of Geochemistry, Chinese Academy of Sciences 1990 Abstract The effect of Rayleigh distillation by outgassing of $ SO_{2} $ and $ H_{2} $S on the isotopic composition of sulfur remaining in silicate melts is quantitatively modelled. A threshold mole fraction of sulfur in sulfide component of the melts is reckoned to be of critical importance in shifting the $ δ^{34} $S of the melts mith respect to the original magmas. The partial equilibrium fractionation in a magmatic system is evaluated by assuming that a non-equilibrium flux of sulfur occurs between magmatic volatiles and the melts, while an equilibrium fractionation is approached between sulfate and sulfide within the melts. The results show that under high$$f_{O_2 } $$ conditions, the sulfate/sulfide ratio in a melt tends to increase, and the $ δ^{34} $ S value of sulfur in a solidified rock might then be shifted in the positive direction. This may either be due to Rayleigh outgassing in case the mole fraction of sulfide is less than the threshold, or due to a unidirectional increase in $ δ^{34} $S value of the sulfate with decreasing temperature. Conversely, at low$$f_{O_2 } $$, the sulfate/sulfide ratio tends to decrease and the $ δ^{34} $S value of total sulfur could be driven in the negative direction, either because of the Rayleigh outgassing in case the mole fraction of sulfide is greater than the threshold, or because of a unidirectional decrease in $ δ^{34} $S value of the sulfide. To establish isotopic equilibrium between sulfate and sulfide, the HM, QFM or WM buffers in the magmatic system are suggested to provide the redox couple that could simultaneously reduce the sulfate and oxidize the sulfide. CaO present in the silicate melts is also called upon to participate in the chemical equilibrium between sulfate and sulfide. Consequently, the $ δ^{34} $S value of an igneous rock could considerably deviate from that of its original magma due to the influence of oxygen fugacity and temperature at the time of magma solidification. Sulfide Oxygen Fugacity Sulfur Isotope Magmatic System Isotopic Equilibrium Enthalten in Chinese journal of geochemistry Science in China Press, 1985 9(1990), 1 vom: Jan., Seite 27-45 (DE-627)130963208 (DE-600)1066729-5 (DE-576)077051459 1000-9426 nnns volume:9 year:1990 number:1 month:01 pages:27-45 https://doi.org/10.1007/BF02837946 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-GEO SSG-OPC-GGO GBV_ILN_22 GBV_ILN_40 GBV_ILN_70 GBV_ILN_4012 AR 9 1990 1 01 27-45 |
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10.1007/BF02837946 doi (DE-627)OLC2088096620 (DE-He213)BF02837946-p DE-627 ger DE-627 rakwb eng 550 540 VZ 13 ssgn Yongfei, Zheng verfasserin aut Sulfur isotope fractionation in magmatic systems: Models of Rayleigh distillation and selective flux 1990 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Institute of Geochemistry, Chinese Academy of Sciences 1990 Abstract The effect of Rayleigh distillation by outgassing of $ SO_{2} $ and $ H_{2} $S on the isotopic composition of sulfur remaining in silicate melts is quantitatively modelled. A threshold mole fraction of sulfur in sulfide component of the melts is reckoned to be of critical importance in shifting the $ δ^{34} $S of the melts mith respect to the original magmas. The partial equilibrium fractionation in a magmatic system is evaluated by assuming that a non-equilibrium flux of sulfur occurs between magmatic volatiles and the melts, while an equilibrium fractionation is approached between sulfate and sulfide within the melts. The results show that under high$$f_{O_2 } $$ conditions, the sulfate/sulfide ratio in a melt tends to increase, and the $ δ^{34} $ S value of sulfur in a solidified rock might then be shifted in the positive direction. This may either be due to Rayleigh outgassing in case the mole fraction of sulfide is less than the threshold, or due to a unidirectional increase in $ δ^{34} $S value of the sulfate with decreasing temperature. Conversely, at low$$f_{O_2 } $$, the sulfate/sulfide ratio tends to decrease and the $ δ^{34} $S value of total sulfur could be driven in the negative direction, either because of the Rayleigh outgassing in case the mole fraction of sulfide is greater than the threshold, or because of a unidirectional decrease in $ δ^{34} $S value of the sulfide. To establish isotopic equilibrium between sulfate and sulfide, the HM, QFM or WM buffers in the magmatic system are suggested to provide the redox couple that could simultaneously reduce the sulfate and oxidize the sulfide. CaO present in the silicate melts is also called upon to participate in the chemical equilibrium between sulfate and sulfide. Consequently, the $ δ^{34} $S value of an igneous rock could considerably deviate from that of its original magma due to the influence of oxygen fugacity and temperature at the time of magma solidification. Sulfide Oxygen Fugacity Sulfur Isotope Magmatic System Isotopic Equilibrium Enthalten in Chinese journal of geochemistry Science in China Press, 1985 9(1990), 1 vom: Jan., Seite 27-45 (DE-627)130963208 (DE-600)1066729-5 (DE-576)077051459 1000-9426 nnns volume:9 year:1990 number:1 month:01 pages:27-45 https://doi.org/10.1007/BF02837946 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-GEO SSG-OPC-GGO GBV_ILN_22 GBV_ILN_40 GBV_ILN_70 GBV_ILN_4012 AR 9 1990 1 01 27-45 |
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10.1007/BF02837946 doi (DE-627)OLC2088096620 (DE-He213)BF02837946-p DE-627 ger DE-627 rakwb eng 550 540 VZ 13 ssgn Yongfei, Zheng verfasserin aut Sulfur isotope fractionation in magmatic systems: Models of Rayleigh distillation and selective flux 1990 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Institute of Geochemistry, Chinese Academy of Sciences 1990 Abstract The effect of Rayleigh distillation by outgassing of $ SO_{2} $ and $ H_{2} $S on the isotopic composition of sulfur remaining in silicate melts is quantitatively modelled. A threshold mole fraction of sulfur in sulfide component of the melts is reckoned to be of critical importance in shifting the $ δ^{34} $S of the melts mith respect to the original magmas. The partial equilibrium fractionation in a magmatic system is evaluated by assuming that a non-equilibrium flux of sulfur occurs between magmatic volatiles and the melts, while an equilibrium fractionation is approached between sulfate and sulfide within the melts. The results show that under high$$f_{O_2 } $$ conditions, the sulfate/sulfide ratio in a melt tends to increase, and the $ δ^{34} $ S value of sulfur in a solidified rock might then be shifted in the positive direction. This may either be due to Rayleigh outgassing in case the mole fraction of sulfide is less than the threshold, or due to a unidirectional increase in $ δ^{34} $S value of the sulfate with decreasing temperature. Conversely, at low$$f_{O_2 } $$, the sulfate/sulfide ratio tends to decrease and the $ δ^{34} $S value of total sulfur could be driven in the negative direction, either because of the Rayleigh outgassing in case the mole fraction of sulfide is greater than the threshold, or because of a unidirectional decrease in $ δ^{34} $S value of the sulfide. To establish isotopic equilibrium between sulfate and sulfide, the HM, QFM or WM buffers in the magmatic system are suggested to provide the redox couple that could simultaneously reduce the sulfate and oxidize the sulfide. CaO present in the silicate melts is also called upon to participate in the chemical equilibrium between sulfate and sulfide. Consequently, the $ δ^{34} $S value of an igneous rock could considerably deviate from that of its original magma due to the influence of oxygen fugacity and temperature at the time of magma solidification. Sulfide Oxygen Fugacity Sulfur Isotope Magmatic System Isotopic Equilibrium Enthalten in Chinese journal of geochemistry Science in China Press, 1985 9(1990), 1 vom: Jan., Seite 27-45 (DE-627)130963208 (DE-600)1066729-5 (DE-576)077051459 1000-9426 nnns volume:9 year:1990 number:1 month:01 pages:27-45 https://doi.org/10.1007/BF02837946 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-GEO SSG-OPC-GGO GBV_ILN_22 GBV_ILN_40 GBV_ILN_70 GBV_ILN_4012 AR 9 1990 1 01 27-45 |
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| author |
Yongfei, Zheng |
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Yongfei, Zheng ddc 550 ssgn 13 misc Sulfide misc Oxygen Fugacity misc Sulfur Isotope misc Magmatic System misc Isotopic Equilibrium Sulfur isotope fractionation in magmatic systems: Models of Rayleigh distillation and selective flux |
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550 540 VZ 13 ssgn Sulfur isotope fractionation in magmatic systems: Models of Rayleigh distillation and selective flux Sulfide Oxygen Fugacity Sulfur Isotope Magmatic System Isotopic Equilibrium |
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ddc 550 ssgn 13 misc Sulfide misc Oxygen Fugacity misc Sulfur Isotope misc Magmatic System misc Isotopic Equilibrium |
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ddc 550 ssgn 13 misc Sulfide misc Oxygen Fugacity misc Sulfur Isotope misc Magmatic System misc Isotopic Equilibrium |
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Sulfur isotope fractionation in magmatic systems: Models of Rayleigh distillation and selective flux |
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Sulfur isotope fractionation in magmatic systems: Models of Rayleigh distillation and selective flux |
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Yongfei, Zheng |
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Chinese journal of geochemistry |
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1990 |
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sulfur isotope fractionation in magmatic systems: models of rayleigh distillation and selective flux |
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Sulfur isotope fractionation in magmatic systems: Models of Rayleigh distillation and selective flux |
| abstract |
Abstract The effect of Rayleigh distillation by outgassing of $ SO_{2} $ and $ H_{2} $S on the isotopic composition of sulfur remaining in silicate melts is quantitatively modelled. A threshold mole fraction of sulfur in sulfide component of the melts is reckoned to be of critical importance in shifting the $ δ^{34} $S of the melts mith respect to the original magmas. The partial equilibrium fractionation in a magmatic system is evaluated by assuming that a non-equilibrium flux of sulfur occurs between magmatic volatiles and the melts, while an equilibrium fractionation is approached between sulfate and sulfide within the melts. The results show that under high$$f_{O_2 } $$ conditions, the sulfate/sulfide ratio in a melt tends to increase, and the $ δ^{34} $ S value of sulfur in a solidified rock might then be shifted in the positive direction. This may either be due to Rayleigh outgassing in case the mole fraction of sulfide is less than the threshold, or due to a unidirectional increase in $ δ^{34} $S value of the sulfate with decreasing temperature. Conversely, at low$$f_{O_2 } $$, the sulfate/sulfide ratio tends to decrease and the $ δ^{34} $S value of total sulfur could be driven in the negative direction, either because of the Rayleigh outgassing in case the mole fraction of sulfide is greater than the threshold, or because of a unidirectional decrease in $ δ^{34} $S value of the sulfide. To establish isotopic equilibrium between sulfate and sulfide, the HM, QFM or WM buffers in the magmatic system are suggested to provide the redox couple that could simultaneously reduce the sulfate and oxidize the sulfide. CaO present in the silicate melts is also called upon to participate in the chemical equilibrium between sulfate and sulfide. Consequently, the $ δ^{34} $S value of an igneous rock could considerably deviate from that of its original magma due to the influence of oxygen fugacity and temperature at the time of magma solidification. © Institute of Geochemistry, Chinese Academy of Sciences 1990 |
| abstractGer |
Abstract The effect of Rayleigh distillation by outgassing of $ SO_{2} $ and $ H_{2} $S on the isotopic composition of sulfur remaining in silicate melts is quantitatively modelled. A threshold mole fraction of sulfur in sulfide component of the melts is reckoned to be of critical importance in shifting the $ δ^{34} $S of the melts mith respect to the original magmas. The partial equilibrium fractionation in a magmatic system is evaluated by assuming that a non-equilibrium flux of sulfur occurs between magmatic volatiles and the melts, while an equilibrium fractionation is approached between sulfate and sulfide within the melts. The results show that under high$$f_{O_2 } $$ conditions, the sulfate/sulfide ratio in a melt tends to increase, and the $ δ^{34} $ S value of sulfur in a solidified rock might then be shifted in the positive direction. This may either be due to Rayleigh outgassing in case the mole fraction of sulfide is less than the threshold, or due to a unidirectional increase in $ δ^{34} $S value of the sulfate with decreasing temperature. Conversely, at low$$f_{O_2 } $$, the sulfate/sulfide ratio tends to decrease and the $ δ^{34} $S value of total sulfur could be driven in the negative direction, either because of the Rayleigh outgassing in case the mole fraction of sulfide is greater than the threshold, or because of a unidirectional decrease in $ δ^{34} $S value of the sulfide. To establish isotopic equilibrium between sulfate and sulfide, the HM, QFM or WM buffers in the magmatic system are suggested to provide the redox couple that could simultaneously reduce the sulfate and oxidize the sulfide. CaO present in the silicate melts is also called upon to participate in the chemical equilibrium between sulfate and sulfide. Consequently, the $ δ^{34} $S value of an igneous rock could considerably deviate from that of its original magma due to the influence of oxygen fugacity and temperature at the time of magma solidification. © Institute of Geochemistry, Chinese Academy of Sciences 1990 |
| abstract_unstemmed |
Abstract The effect of Rayleigh distillation by outgassing of $ SO_{2} $ and $ H_{2} $S on the isotopic composition of sulfur remaining in silicate melts is quantitatively modelled. A threshold mole fraction of sulfur in sulfide component of the melts is reckoned to be of critical importance in shifting the $ δ^{34} $S of the melts mith respect to the original magmas. The partial equilibrium fractionation in a magmatic system is evaluated by assuming that a non-equilibrium flux of sulfur occurs between magmatic volatiles and the melts, while an equilibrium fractionation is approached between sulfate and sulfide within the melts. The results show that under high$$f_{O_2 } $$ conditions, the sulfate/sulfide ratio in a melt tends to increase, and the $ δ^{34} $ S value of sulfur in a solidified rock might then be shifted in the positive direction. This may either be due to Rayleigh outgassing in case the mole fraction of sulfide is less than the threshold, or due to a unidirectional increase in $ δ^{34} $S value of the sulfate with decreasing temperature. Conversely, at low$$f_{O_2 } $$, the sulfate/sulfide ratio tends to decrease and the $ δ^{34} $S value of total sulfur could be driven in the negative direction, either because of the Rayleigh outgassing in case the mole fraction of sulfide is greater than the threshold, or because of a unidirectional decrease in $ δ^{34} $S value of the sulfide. To establish isotopic equilibrium between sulfate and sulfide, the HM, QFM or WM buffers in the magmatic system are suggested to provide the redox couple that could simultaneously reduce the sulfate and oxidize the sulfide. CaO present in the silicate melts is also called upon to participate in the chemical equilibrium between sulfate and sulfide. Consequently, the $ δ^{34} $S value of an igneous rock could considerably deviate from that of its original magma due to the influence of oxygen fugacity and temperature at the time of magma solidification. © Institute of Geochemistry, Chinese Academy of Sciences 1990 |
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