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Question
in papers related to hydrothermal fluids at mid oceanic ridges, what does seawater/rock mass ratios mean?

Answer
Ana:

The term seawater/rock mass has to do with the amount of water that a mass of molten rock effects or interacts with under certain conditions.

For instance in this abstract:  http://adsabs.harvard.edu/abs/1982GeCoA..46..985S

Tests were run on seawater and basalt interaction at 300C and it showed that the basalt underwent alteration that removed all Mg2+ from a volume of seawater 50 times the mass of the basalt.  The hydrothermal alteration caused the basalt to change to smectite-chlorite (clays), anhydrite and minor hematite.  The Mg removal occurred as Mg(OH)2 and was incorporated into the secondary clay minerals formed.

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Keith Patton

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I can answer questions concerning physical and historical geology, environmental geology/hydrology, environmental consulting, remote sensing/aerial photo interpretation, G&G computer applications, petroleum exploration, drilling, geochemistry, geochemical and microbiological prospecting, 3D reservoir modeling, computer mapping and drilling.I am not a geophysicist.

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I have 24 years experience split between the petroleum and environmental industries. I have served as an expert witness in remote sensing, developmental geologist, exploration geologist, enviromental project manager, and subject matter expert in geology and geophysical software development.

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American Association of Petroleum Geologists
American Association of Photogrammetrists and Remote Sensing

Education/Credentials
Bachelor and Master of Science
Registered Geologist in State of Texas

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