Details
| Originalsprache | Englisch |
|---|---|
| Seiten (von - bis) | 201-212 |
| Seitenumfang | 12 |
| Fachzeitschrift | Contributions to Mineralogy and Petrology |
| Jahrgang | 147 |
| Ausgabenummer | 2 |
| Frühes Online-Datum | 7 Feb. 2004 |
| Publikationsstatus | Veröffentlicht - Apr. 2004 |
Abstract
The effect of sulfur on phosphorus solubility in rhyolitic melt and the sulfur distribution between apatite, ± anhydrite, melt and fluid have been determined at 200 MPa and 800-1,100 °C via apatite crystallization and dissolution experiments. The presence of a small amount of sulfur in the system (0.5 wt.% S) under oxidizing conditions increases the solubility of phosphorus in the melt, probably due to changing calcium activity in the melt as a result of the formation of Ca-S complexing cations. Apatite solubility geothermometers tend to overestimate temperature in Ca-poor, S-bearing system at oxidizing conditions. In crystallization experiments, the sulfur content in apatite decreases with decreasing temperature and also with decreasing sulfur content of the melt. The sulfur partition coefficient between apatite and rhyolitic melt increases with decreasing temperature (KdSapatite/melt = 4.5-14.2 at T = 1,100-900 °C) under sulfur-undersaturated conditions (no anhydrite). The sulfur partition coefficient is lower in anhydrite-saturated melt (∼8 at 800 °C) than in anhydrite-undersaturated melt, suggesting that KdSapatite/melt depends not only on the temperature but also on the sulfur content of the melt. These first results indicate that the sulfur content in apatite can be used to track the evolution of sulfur content in a magmatic system at oxidizing conditions.
ASJC Scopus Sachgebiete
- Erdkunde und Planetologie (insg.)
- Geophysik
- Erdkunde und Planetologie (insg.)
- Geochemie und Petrologie
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in: Contributions to Mineralogy and Petrology, Jahrgang 147, Nr. 2, 04.2004, S. 201-212.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - Sulfur partitioning between apatite and melt and effect of sulfur on apatite solubility at oxidizing conditions
AU - Parat, Fleurice
AU - Holtz, François
N1 - Funding Information: Acknowledgements We thank Jürgen Koepke for assistance to microprobe analyses, Harald Behrens for discussions, and Otto Diedrich for technical assistance during sample preparations. The manuscript was greatly improved with reviews by Mike Carroll and an anonymous reviewer. This research was supported by the European Community—Marie Curie Individual Fellowship (HPMF-CT-2001–01508). Copyright: Copyright 2008 Elsevier B.V., All rights reserved.
PY - 2004/4
Y1 - 2004/4
N2 - The effect of sulfur on phosphorus solubility in rhyolitic melt and the sulfur distribution between apatite, ± anhydrite, melt and fluid have been determined at 200 MPa and 800-1,100 °C via apatite crystallization and dissolution experiments. The presence of a small amount of sulfur in the system (0.5 wt.% S) under oxidizing conditions increases the solubility of phosphorus in the melt, probably due to changing calcium activity in the melt as a result of the formation of Ca-S complexing cations. Apatite solubility geothermometers tend to overestimate temperature in Ca-poor, S-bearing system at oxidizing conditions. In crystallization experiments, the sulfur content in apatite decreases with decreasing temperature and also with decreasing sulfur content of the melt. The sulfur partition coefficient between apatite and rhyolitic melt increases with decreasing temperature (KdSapatite/melt = 4.5-14.2 at T = 1,100-900 °C) under sulfur-undersaturated conditions (no anhydrite). The sulfur partition coefficient is lower in anhydrite-saturated melt (∼8 at 800 °C) than in anhydrite-undersaturated melt, suggesting that KdSapatite/melt depends not only on the temperature but also on the sulfur content of the melt. These first results indicate that the sulfur content in apatite can be used to track the evolution of sulfur content in a magmatic system at oxidizing conditions.
AB - The effect of sulfur on phosphorus solubility in rhyolitic melt and the sulfur distribution between apatite, ± anhydrite, melt and fluid have been determined at 200 MPa and 800-1,100 °C via apatite crystallization and dissolution experiments. The presence of a small amount of sulfur in the system (0.5 wt.% S) under oxidizing conditions increases the solubility of phosphorus in the melt, probably due to changing calcium activity in the melt as a result of the formation of Ca-S complexing cations. Apatite solubility geothermometers tend to overestimate temperature in Ca-poor, S-bearing system at oxidizing conditions. In crystallization experiments, the sulfur content in apatite decreases with decreasing temperature and also with decreasing sulfur content of the melt. The sulfur partition coefficient between apatite and rhyolitic melt increases with decreasing temperature (KdSapatite/melt = 4.5-14.2 at T = 1,100-900 °C) under sulfur-undersaturated conditions (no anhydrite). The sulfur partition coefficient is lower in anhydrite-saturated melt (∼8 at 800 °C) than in anhydrite-undersaturated melt, suggesting that KdSapatite/melt depends not only on the temperature but also on the sulfur content of the melt. These first results indicate that the sulfur content in apatite can be used to track the evolution of sulfur content in a magmatic system at oxidizing conditions.
UR - http://www.scopus.com/inward/record.url?scp=2142653217&partnerID=8YFLogxK
U2 - 10.1007/s00410-004-0553-7
DO - 10.1007/s00410-004-0553-7
M3 - Article
AN - SCOPUS:2142653217
VL - 147
SP - 201
EP - 212
JO - Contributions to Mineralogy and Petrology
JF - Contributions to Mineralogy and Petrology
SN - 0010-7999
IS - 2
ER -