Iron isotope constraints on Fe cycling and mass balance in oxygenated Earth oceans

Research Article| July 01, 2003 Iron isotope constraints on Fe cycling and mass balance in oxygenated Earth oceans Brian L. Beard; Brian L. Beard 1Department of Geology and Geophysics, University of Wisconsin, 1215 West Dayton Street, Madison, Wisconsin 53706, USA Search for other works by this author on: GSW Google Scholar Clark M. Johnson; Clark M. Johnson 1Department of Geology and Geophysics, University of Wisconsin, 1215 West Dayton Street, Madison, Wisconsin 53706, USA Search for other works by this author on: GSW Google Scholar Karen L. Von Damm; Karen L. Von Damm 2Complex Systems Research Center, Institute for the Study of Earth, Oceans and Space, University of New Hampshire, 366 Morse Hall, 39 College Road, Durham, New Hampshire 03824-3525, USA Search for other works by this author on: GSW Google Scholar Rebecca L. Poulson Rebecca L. Poulson 3Department of Geology and Geophysics, University of Wisconsin, 1215 West Dayton Street, Madison, Wisconsin 53706, USA Search for other works by this author on: GSW Google Scholar Author and Article Information Brian L. Beard 1Department of Geology and Geophysics, University of Wisconsin, 1215 West Dayton Street, Madison, Wisconsin 53706, USA Clark M. Johnson 1Department of Geology and Geophysics, University of Wisconsin, 1215 West Dayton Street, Madison, Wisconsin 53706, USA Karen L. Von Damm 2Complex Systems Research Center, Institute for the Study of Earth, Oceans and Space, University of New Hampshire, 366 Morse Hall, 39 College Road, Durham, New Hampshire 03824-3525, USA Rebecca L. Poulson 3Department of Geology and Geophysics, University of Wisconsin, 1215 West Dayton Street, Madison, Wisconsin 53706, USA Publisher: Geological Society of America Received: 23 Dec 2002 Revision Received: 31 Mar 2003 Accepted: 02 Apr 2003 First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (2003) 31 (7): 629–632. https://doi.org/10.1130/0091-7613(2003)031<0629:IICOFC>2.0.CO;2 Article history Received: 23 Dec 2002 Revision Received: 31 Mar 2003 Accepted: 02 Apr 2003 First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Brian L. Beard, Clark M. Johnson, Karen L. Von Damm, Rebecca L. Poulson; Iron isotope constraints on Fe cycling and mass balance in oxygenated Earth oceans. Geology 2003;; 31 (7): 629–632. doi: https://doi.org/10.1130/0091-7613(2003)031<0629:IICOFC>2.0.CO;2 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 The Fe isotope composition of Proterozoic to modern clastic sedimentary rocks and aerosols defines a range in δ56Fe values that is only slightly more variable than the range of Fe isotope compositions measured in terrestrial igneous rocks, indicating that chemical weathering, sedimentary transport, and diagenesis play only a minor role in producing Fe isotope variations in environments where Fe redox conditions have been controlled by current levels of atmospheric oxygen. In contrast, the Fe isotope compositions of hot fluids (>300 °C) from mid-ocean-ridge (MOR) spreading centers define a narrow range that is shifted to lower δ56Fe values by 0.2‰–0.5‰ as compared to igneous rocks. These new data allow a conceptual model for the Fe isotope composition of the oxic oceans that predicts large ranges in Fe isotope composition under conditions of changing aerosol and MOR Fe fluxes, such as during periods of major worldwide glaciation. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.