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. 2018 Aug 1;18(8):1023–1040. doi: 10.1089/ast.2017.1770

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© Sukrit Ranjan et al., 2018; Published by Mary Ann Liebert, Inc.

This Open Access article is distributed under the terms of the Creative Commons License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited.

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FIG. 3. — Speciation of sulfur-bearing molecules in an aqueous reservoir buffered to pH = 7 as a function of total sulfur emission flux Φ_S. The range of Φ_S highlighted by Halevy and Head (2014) for emplacement of basaltic plains on Earth is shaded in gray. Horizontal dashed and dotted lines demarcate micromolar and millimolar concentrations, respectively.