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The hyperarid Atacama Desert contains numerous local basins with surficial salt crusts, known as salars, where evaporation of shallow groundwater drives the major soil processes. We examine chemical and isotopic profiles in two soils of differing ages from the Salar Llamara to determine the geochemical processes involved in their formation. Evaporation, which provides salts to the soils through mineral...
Along the northern margin of the 1.85Ga Sudbury Igneous Complex (SIC), Canada, a volumetrically minor rock type known as the footwall granophyre (FWGP) preserves evidence of the interaction of magmatic fluid and groundwater. The FWGP comprises veins, dikes and irregular bodies of a quartz–alkali feldspar–plagioclase intergrowth that are most abundant near footwall-style Cu–Ni–platinum-group element...
We measured experimentally the chlorine isotope fractionation between coexisting vapor and liquid in the system H 2 O–NaCl. Experiments were performed between 23 and 28 MPa along the 400 °C isotherm and between 38 and 42 MPa along the 450 °C isotherm. Calculated chlorine isotope fractionation Δ 37 Cl vapor–liquid =δ 37 Cl vapor −δ 37 Cl liquid ...
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