Details
| Originalsprache | Englisch |
|---|---|
| Seiten (von - bis) | 1717-1726 |
| Seitenumfang | 10 |
| Fachzeitschrift | American Mineralogist |
| Jahrgang | 87 |
| Ausgabenummer | 11-12 |
| Publikationsstatus | Veröffentlicht - 1 Nov. 2002 |
Abstract
This study presents improvements of internally heated pressure vessels to realize high-pressure experiments at controlled fO2 in low-viscosity systems such as basaltic ones. The new design is a combination of two experimental techniques: a hydrogen sensor membrane made of platinum to measure fH2, and therefore fO2, and a rapid-quench system to avoid crystallization of low-viscosity melts during quench. The experimental setup has been tested successfully at temperatures up to 1250 °C and pressures up to 500 MPa. Basaltic melts containing up to 9.38 wt% water can be quenched as bubble-free and crystal-free glasses. The improvements allow synthesis of hydrated glass or partly crystallized samples with a large volume (for further studies) and to perform routine phase-equilibrium studies in basaltic systems at geologically relevant conditions. We used the new technique to determine the effect of fO2 on water solubility in a melt with MORB composition. The results show that there is a small but significant decrease of water solubility with decreasing fO2 from MnO-Mn3O4 to QFM buffer conditions in the pressure range 50-200 MPa. Kinetic problems in crystallization experiments in basaltic systems and the duration necessary to attain equilibrium Fe2+/Fe3+ ratio in the charge are discussed.
ASJC Scopus Sachgebiete
- Erdkunde und Planetologie (insg.)
- Geophysik
- Erdkunde und Planetologie (insg.)
- Geochemie und Petrologie
Zitieren
- Standard
- Harvard
- Apa
- Vancouver
- BibTex
- RIS
in: American Mineralogist, Jahrgang 87, Nr. 11-12, 01.11.2002, S. 1717-1726.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - A combined rapid-quench and H2-membrane setup for internally heated pressure vessels
T2 - Description and application for water solubility in basaltic melts
AU - Berndt, Jasper
AU - Liebske, Christian
AU - Holtz, François
AU - Freise, Marcus
AU - Nowak, Marcus
AU - Ziegenbein, Dieter
AU - Hurkuck, Willi
AU - Koepke, Jürgen
N1 - Copyright: Copyright 2018 Elsevier B.V., All rights reserved.
PY - 2002/11/1
Y1 - 2002/11/1
N2 - This study presents improvements of internally heated pressure vessels to realize high-pressure experiments at controlled fO2 in low-viscosity systems such as basaltic ones. The new design is a combination of two experimental techniques: a hydrogen sensor membrane made of platinum to measure fH2, and therefore fO2, and a rapid-quench system to avoid crystallization of low-viscosity melts during quench. The experimental setup has been tested successfully at temperatures up to 1250 °C and pressures up to 500 MPa. Basaltic melts containing up to 9.38 wt% water can be quenched as bubble-free and crystal-free glasses. The improvements allow synthesis of hydrated glass or partly crystallized samples with a large volume (for further studies) and to perform routine phase-equilibrium studies in basaltic systems at geologically relevant conditions. We used the new technique to determine the effect of fO2 on water solubility in a melt with MORB composition. The results show that there is a small but significant decrease of water solubility with decreasing fO2 from MnO-Mn3O4 to QFM buffer conditions in the pressure range 50-200 MPa. Kinetic problems in crystallization experiments in basaltic systems and the duration necessary to attain equilibrium Fe2+/Fe3+ ratio in the charge are discussed.
AB - This study presents improvements of internally heated pressure vessels to realize high-pressure experiments at controlled fO2 in low-viscosity systems such as basaltic ones. The new design is a combination of two experimental techniques: a hydrogen sensor membrane made of platinum to measure fH2, and therefore fO2, and a rapid-quench system to avoid crystallization of low-viscosity melts during quench. The experimental setup has been tested successfully at temperatures up to 1250 °C and pressures up to 500 MPa. Basaltic melts containing up to 9.38 wt% water can be quenched as bubble-free and crystal-free glasses. The improvements allow synthesis of hydrated glass or partly crystallized samples with a large volume (for further studies) and to perform routine phase-equilibrium studies in basaltic systems at geologically relevant conditions. We used the new technique to determine the effect of fO2 on water solubility in a melt with MORB composition. The results show that there is a small but significant decrease of water solubility with decreasing fO2 from MnO-Mn3O4 to QFM buffer conditions in the pressure range 50-200 MPa. Kinetic problems in crystallization experiments in basaltic systems and the duration necessary to attain equilibrium Fe2+/Fe3+ ratio in the charge are discussed.
UR - http://www.scopus.com/inward/record.url?scp=0036874142&partnerID=8YFLogxK
U2 - 10.2138/am-2002-11-1222
DO - 10.2138/am-2002-11-1222
M3 - Article
AN - SCOPUS:0036874142
VL - 87
SP - 1717
EP - 1726
JO - American Mineralogist
JF - American Mineralogist
SN - 0003-004X
IS - 11-12
ER -