Show simple item record

dc.contributor.authorBaldassaro, Paige Marieen_US
dc.date.accessioned2014-03-14T20:31:33Z
dc.date.available2014-03-14T20:31:33Z
dc.date.issued1998-05-08en_US
dc.identifier.otheretd-02072000-12380020en_US
dc.identifier.urihttp://hdl.handle.net/10919/31155
dc.description.abstractABSTRACT The low temperature phase behavior of the system H2O-NaCl-FeCl2 was examined using synthetic fluid inclusions. Experiments were conducted along the 5 wt% NaCl (relative to the total solution) pseudobinary, with FeCl2 concentrations varying from 2 to 33 wt%, and along the pseudobinary defined by mixing known amounts of FeCl2-4H2O with a 5 wt% NaCl solution, with final FeCl2 concentrations varying from 0 to 29 wt%. Synthetic fluid inclusions in quartz were prepared in cold-seal pressure vessels at 500 degrees C - 800 degrees C and 2 or 3 kilobars. The fO2 conditions were controlled by the Ni-NiO equilibrium curve. The liquid released from the capsule upon opening was initially colorless, but turned yellow-orange after contact with atmospheric O2. The clear color is characteristic of ferrous iron solutions, whereas the yellow-orange color is consistent with the presence of Fe3+ in solution. This color change suggested that the unopened capsules initially contained ferrous iron in solution, which oxidized to ferric iron when exposed to the atmosphere. Borisenko (1977) reported a eutectic temperature of -37 degrees C for the system H2O-NaCl-FeCl2. In this study, it was not possible to verify this temperature due to the persistence of a metastable liquid down to liquid N2 temperatures (~-196 degrees C). Final ice melting temperatures were obtained for concentrations less than 24 wt% FeCl2 and show a decrease in temperature with increase in FeCl2 concentration. For more concentrated solutions, final melting temperatures could not be obtained because the samples could not be frozen.en_US
dc.publisherVirginia Techen_US
dc.relation.haspartETD.pdfen_US
dc.rightsI hereby grant to Virginia Tech or its agents the right to archive and to make available my thesis or dissertation in whole or in part in the University Libraries in all forms of media, now or hereafter known. I retain all proprietary rights, such as patent rights. I also retain the right to use in future works (such as articles or books) all or part of this thesis or dissertation.en_US
dc.subjectsodium chlorideen_US
dc.subjectlow temperature aqueous geochemistryen_US
dc.subjectsynthetic fluid inclusionsen_US
dc.subjectiron chlorideen_US
dc.titleLow Temperature Phase Relations in the System H2O-NaCl-FeCl2en_US
dc.typeThesisen_US
dc.contributor.departmentGeological Sciencesen_US
thesis.degree.nameMaster of Scienceen_US
thesis.degree.levelmastersen_US
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen_US
dc.contributor.committeechairBodnar, Robert J.en_US
dc.contributor.committeememberRimstidt, james Donalden_US
dc.contributor.committeememberTracy, Robert J.en_US
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-02072000-12380020/en_US
dc.date.sdate2000-02-07en_US
dc.date.rdate2001-02-09
dc.date.adate2000-02-09en_US


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record