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dc.contributor.authorSchmidt, Christianen
dc.date.accessioned2014-03-14T20:22:13Zen
dc.date.available2014-03-14T20:22:13Zen
dc.date.issued1997-03-21en
dc.identifier.otheretd-566232139711101en
dc.identifier.urihttp://hdl.handle.net/10919/30610en
dc.description.abstractPhase equilibria and volumetric properties in the system water-sodium chloride-carbon dioxide were determined experimentally for pressures between about 1 to 6 kbar, temperatures of 300° to 800°C, and fluid compositions up to 40 wt% NaCl and 20 mol% carbon dioxide, both relative to water. This was accomplished by using the synthetic fluid inclusion technique in conjunction with conventional microthermometry, a hydrothermal diamond-anvil cell and Raman spectroscopy. At constant salinity, the high-pressure portion of the solvus migrates to higher pressures and temperatures with increasing carbon dioxide concentration. Immiscibility is possible in this ternary system over almost the entire range of crustal P-T conditions at salinities equal to or in excess of 20 wt% NaCl and carbon dioxide concentrations between about 30 and 70 mol% carbon dioxide. The dP/dT slopes of lines of equal homogenization temperature decrease nonlinearly with increasing homogenization temperature; at constant homogenization temperature, these slopes become steeper (higher) along pseudobinaries with addition of carbon dioxide and particularly with addition of sodium chloride. Up to concentrations of 20 wt% NaCl and 20 mol% carbon dioxide, a sharp rise in the critical temperature was observed with increasing salinity at a fixed water/carbon dioxide ratio. The critical point shifts rapidly towards higher pressures with increasing carbon dioxide concentration. Addition of carbon dioxide to an aqueous 40 wt% NaCl solution results in a slight elevation of the halite dissolution temperature under vapor-saturated conditions. A significant error can be associated with the calculation of molar volumes from measured densities of the carbonic phase of water-sodium chloride-carbon dioxide inclusions. To avoid such errors, phase diagrams were constructed based on the obtained lines of equal homogenization temperature for salinities between 6 and 40 wt% NaCl and carbon dioxide concentrations between 5 and 20 mol% relative to water. These diagrams are of direct applicability to the interpretation of natural fluid inclusions from a wide variety of geologic environments.en
dc.format.extent49 leavesen
dc.format.mimetypeapplication/pdfen
dc.language.isoenen
dc.publisherVirginia Techen
dc.relation.isformatofOCLC# 38491251en
dc.relation.haspartetd.pdfen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectraman spectroscopyen
dc.subjectsynthetic fluid inclusionsen
dc.subjectPVTX propertiesen
dc.subjectwater - sodium chloride - carbon dioxideen
dc.subjecthydrothermal diamond-anvil cellen
dc.subject.lccLD5655.V856 1997.S365en
dc.titleExperimental Study of the PVTX Properties in Part of the Ternary System H₂O-NaCl-CO₂en
dc.typeDissertationen
dc.contributor.departmentGeological Sciencesen
dc.description.degreePh. D.en
thesis.degree.namePh. D.en
thesis.degree.leveldoctoralen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.disciplineGeological Sciencesen
dc.contributor.committeechairBodnar, Robert J.en
dc.contributor.committeememberChou, I. M.en
dc.contributor.committeememberCraig, James R.en
dc.contributor.committeememberTracy, Robert J.en
dc.contributor.committeememberRoedder, E.en
dc.type.dcmitypeTexten
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-566232139711101/en
dc.date.sdate1998-07-18en
dc.date.rdate1997-03-21en
dc.date.adate1997-03-21en


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