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Clay on Mars? What does that mean? 6B562C34-1052-4290-99AD44853E20EC1F -…
Clay on Mars? What does that mean? 
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Closed System
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W/R < 1, pH and Ion Activites on a local scale
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Open System
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W/R > 1, oxidation and hydrolysis of Fe (II) affects water to create acidic pH
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If less water there, olivine dissolves first, depleting magnesium and iron
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Implications
Existence of low-grade hydrothermal systems or direct precipitation during cooling of volatile-rich basaltic lavas
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