With this message, I am forwarding your questions to the author (Dave - with your response, please include a cc to h2osoft@xxxxxxxx for the e-mail archive.) Kate Flynn U.S. Geological Survey Office of Surface Water "Edward Oldmeadow" <edward_oldmeadow@x To: h2osoft@xxxxxxxx otmail.com> cc: In-Reply-To: <NFBBJJDGMKMNCIJGJPOJOEEDCFAA.skohler@xxxxxxxxxxxxxxxx> Subject: Modelling saine environments 12/08/2002 01:05 AM Dear USGS staffmember, Greetings. I am a geochemistry student in Western Australia about to attempt to use the wonderful USGS software.I have downloaded phreeqc and am making my way through the example files. In my reading it seems the software is not very good at modelling saline environments. I am in a rather interesting predicament, where one side of my the sudy area is fresh and the other is briny (up to 4x seawater). The waters are Na and Cl dominated, and I am hoping phreecqc will encompass such a wide range in salinity, with the purpose of modelling solution pathways, aragonite-strontianite solid solution exchanges and some basic speciation calculations. ANY useful tips in this regard would be VERY GREATLY appreciated. Also, I have no direct pe data and have not assessed ammonium or any iron speciation data for my samples. Will phreecqc be limited by my lack of redox data ? Any tips on how to get around such a dilema ?? Yours sincerely Edward Oldmeadow _________________________________________________________________ STOP MORE SPAM with the new MSN 8 and get 2 months FREE* http://join.msn.com/?page=features/junkmail
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