Authors
Sally Newman, Jacob B Lowenstern
Publication date
2002/6/1
Journal
Computers & Geosciences
Volume
28
Issue
5
Pages
597-604
Publisher
Pergamon
Description
We present solution models for the rhyolite–H2O–CO2 and basalt–H2O–CO2 systems at magmatic temperatures and pressures below ∼5000bar. The models are coded as macros written in Visual Basic for Applications, for use within Microsoft® Excel (Office’98 and 2000). The series of macros, entitled VolatileCalc, can calculate the following: (1) Saturation pressures for silicate melt of known dissolved H2O and CO2 concentrations and the corresponding equilibrium vapor composition; (2) open- and closed-system degassing paths (melt and vapor composition) for depressurizing rhyolitic and basaltic melts; (3) isobaric solubility curves for rhyolitic and basaltic melts; (4) isoplethic solubility curves (constant vapor composition) for rhyolitic and basaltic melts; (5) polybaric solubility curves for the two end members and (6) end member fugacities of H2O and CO2 vapors at magmatic temperatures. The basalt–H2O–CO2 …
Total citations
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