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The Possible Photochemical Origins of Banded Iron Formations


Abstract Banded iron formations (BIFs) are among the earliest possible indicators for oxidation of the Archean biosphere. However, the origin of BIFs remains debated. Proposed formation mechanisms include oxidation of Fe(II) by O2 (Cloud, 1973), photoferrotrophy (Konhauser et al., 2002), and abiotic UV photooxidation (Braterman et al., 1983; Konhauser et al., 2007). Resolving this debate could help determine whether BIFs are really indicators of O2, biological activity, or neither.

To examine the viability of abiotic UV photooxidation of Fe, laboratory experiments were conducted in which Fe-bearing solutions were irradiated with different regions of the ultraviolet (UV) spectrum and Fe oxidation and precipitation were measured. The goal was to revi... (more)
Created Date 2017
Contributor Castleberry, Parker (Author) / Anbar, Ariel D (Advisor) / Herckes, Pierre (Committee member) / Lyons, James (Committee member) / Arizona State University (Publisher)
Subject Geochemistry / Geology / Chemistry / Archean / Banded Iron Formation / Experimental / Paleoredox / Photochemistry
Type Masters Thesis
Extent 61 pages
Language English
Copyright
Reuse Permissions All Rights Reserved
Note Masters Thesis Biochemistry 2017
Collaborating Institutions Graduate College / ASU Library
Additional Formats MODS / OAI Dublin Core / RIS


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Description Dissertation/Thesis