Trace element cycling through iron oxide minerals during redox-driven dynamic recrystallization

Research Article| November 01, 2011 Trace element cycling through iron oxide minerals during redox-driven dynamic recrystallization Andrew J. Frierdich; Andrew J. Frierdich * 1Department of Earth and Planetary Sciences, Washington University, St. Louis, Missouri 63130, USA *E-mail: frierdich@eps.wustl.edu. Search for other works by this author on: GSW Google Scholar Yun Luo; Yun Luo 1Department of Earth and Planetary Sciences, Washington University, St. Louis, Missouri 63130, USA2Department of Energy, Environmental, and Chemical Engineering, Washington University, St. Louis, Missouri 63130, USA Search for other works by this author on: GSW Google Scholar Jeffrey G. Catalano Jeffrey G. Catalano 1Department of Earth and Planetary Sciences, Washington University, St. Louis, Missouri 63130, USA Search for other works by this author on: GSW Google Scholar Author and Article Information Andrew J. Frierdich * 1Department of Earth and Planetary Sciences, Washington University, St. Louis, Missouri 63130, USA Yun Luo 1Department of Earth and Planetary Sciences, Washington University, St. Louis, Missouri 63130, USA2Department of Energy, Environmental, and Chemical Engineering, Washington University, St. Louis, Missouri 63130, USA Jeffrey G. Catalano 1Department of Earth and Planetary Sciences, Washington University, St. Louis, Missouri 63130, USA *E-mail: frierdich@eps.wustl.edu. Publisher: Geological Society of America Received: 07 Apr 2011 Revision Received: 22 Jun 2011 Accepted: 24 Jun 2011 First Online: 09 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 © 2011 Geological Society of America Geology (2011) 39 (11): 1083–1086. https://doi.org/10.1130/G32330.1 Article history Received: 07 Apr 2011 Revision Received: 22 Jun 2011 Accepted: 24 Jun 2011 First Online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Andrew J. Frierdich, Yun Luo, Jeffrey G. Catalano; Trace element cycling through iron oxide minerals during redox-driven dynamic recrystallization. Geology 2011;; 39 (11): 1083–1086. doi: https://doi.org/10.1130/G32330.1 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract Microbially driven iron redox cycling in soil and sedimentary systems, including during diagenesis and fluid migration, may activate secondary abiotic reactions between aqueous Fe(II) and solid Fe(III) oxides. These reactions catalyze dynamic recrystallization of iron oxide minerals through localized and simultaneous oxidative adsorption of Fe(II) and reductive dissolution of Fe(III). Redox-active trace elements undergo speciation changes during this process, but the impact redox-driven recrystallization has on redox-inactive trace elements associated with iron oxides is uncertain. Here we demonstrate that Ni is cycled through the minerals goethite and hematite during redox-driven recrystallization. X-ray absorption spectroscopy demonstrates that during this process adsorbed Ni becomes progressively incorporated into the minerals. Kinetic studies using batch reactors containing aqueous Fe(II) and Ni preincorporated into iron oxides display substantial release of Ni to solution. We conclude that iron oxide recrystallization activated by aqueous Fe(II) induces cycling of Ni through the mineral structure, with adsorbed Ni overgrown in regions of Fe(II) oxidative adsorption and incorporated Ni released in regions of reductive dissolution of structural Fe(III). The redistribution of Ni among the mineral bulk, mineral surface, and aqueous solution appears to be thermodynamically controlled and catalyzed by Fe(II). Our work suggests that important proxies for ocean composition on the early Earth may be invalid, identifies new processes controlling micronutrient availability in soil, sedimentary, and aquatic ecosystems, and points toward a mechanism for trace element mobilization during diagenesis and enrichment in geologic fluids. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.