Solubility, speciation and dissolution mechanisms for CO2 in melts on the NaAlO2-SiO2 join

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doi: 10.1016/S0016-7037(99)00196-9
Authors:Brooker, R. A.; Kohn, S. C.; Holloway, J. R.; McMillan, P. F.; Carroll, M. R.
Author Affiliations:Primary:
University of Bristol, Department of Earth Sciences, Bristol, United Kingdom
Arizona State University, United States
Volume Title:Geochimica et Cosmochimica Acta
Source:Geochimica et Cosmochimica Acta, 63(21), p.3549-3565. Publisher: Pergamon, Oxford, International. ISSN: 0016-7037
Publication Date:1999
Note:In English. Includes appendices. 51 refs.; illus., incl. 2 tables
Summary:New data are reported for samples along the SiO2-NaAlSiO4 join, including bulk analyses and characterization by a range of spectroscopic techniques; experimental methods and analytical techniques are described in detail, and important IR, Raman and NMR spectral features of dissolved C-O species for the range of SiO2-NaAlO2 glasses are illustrated. For the P (10-25 kbar) and T (1450-1700°C) conditions used, the solubility of CO2 along the join NaAlO2-SiO2 decreases from rhyolite to jadeite, then increases to nepheline apparently related to the concentrations of the individual species. The T dependence of solubility differs with composition, with Ne showing a positive T dependence, Jd a negative T dependence from 1450 to 1600°C. SiO2-rich compositions have a CO2 solubility insensitive to T. Although melt speciation changes during quenching, some of the high T speciation may be preserved. [R.K.H.]
Sections:Experimental mineralogy
Subjects:Carbon dioxide; Chemical fractionation; Data processing; Experimental studies; Fourier analysis; FTIR spectra; Geochemistry; Glass materials; Infrared spectra; Laboratory studies; Magmas; MAS NMR spectra; Melts; NMR spectra; P-T conditions; Raman spectra; Rhyolitic composition; Solubility; Solution; Spectra; Magic-angle-spinning NMR spectra
Abstract Numbers:00M/3703
Record ID:2000007162
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
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