Evaporation of seawater: calculated mineral sequences.
Van't Hoff's predictions of the mineral sequences to be expected on the evaporation of seawater are based on an oversimplified system. New computer calculation that include calcium-bearing phases are in better agreement with natural occurrences, removing discrepancies that have plagued evaporite geologists for nearly a century. A new hydrologic model that combines equilibrium batch evaporation with fractionation between successive batches is proposed to account for the mineral sequences observed in such classic deposits as the German Zechstein.
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