Siderite formation in anoxic deep-sea sediments: A synergetic bacteria controlled process with improtant implications in paleomagnetism

Abstract

Research Article| November 01, 1988 Siderite formation in anoxic deep-sea sediments: A synergetic bacteria controlled process with improtant implications in paleomagnetism Brooks B. Ellwood; Brooks B. Ellwood 1Department of Geology, University of Texas, Arlington, Texas 76019 Search for other works by this author on: GSW Google Scholar Thomas H. Chrzanowski; Thomas H. Chrzanowski 2Department of Biology, University of Texas, Arlington, Texas 76019 Search for other works by this author on: GSW Google Scholar Frantisek Hrouda; Frantisek Hrouda 3Geofyzika, národní podnik, Brno, Czechoslovakia Search for other works by this author on: GSW Google Scholar Gary J. Long; Gary J. Long 4Department of Chemistry, University of Missouri, Rolla, Missouri 65401 Search for other works by this author on: GSW Google Scholar Margaret L. Buhl Margaret L. Buhl 4Department of Chemistry, University of Missouri, Rolla, Missouri 65401 Search for other works by this author on: GSW Google Scholar Geology (1988) 16 (11): 980–982. https://doi.org/10.1130/0091-7613(1988)016<0980:SFIADS>2.3.CO;2 Article history first online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share MailTo Twitter LinkedIn Tools Icon Tools Get Permissions Search Site Citation Brooks B. Ellwood, Thomas H. Chrzanowski, Frantisek Hrouda, Gary J. Long, Margaret L. Buhl; Siderite formation in anoxic deep-sea sediments: A synergetic bacteria controlled process with improtant implications in paleomagnetism. Geology 1988;; 16 (11): 980–982. doi: https://doi.org/10.1130/0091-7613(1988)016<0980:SFIADS>2.3.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 Recent work on magnetic properties of limestones has demonstrated that the mineral siderite can be very important in paleomagnetism, for two reasons. First, oxidation of siderite produces secondary (daughter) magnetic minerals (magnetite, maghemite, and hematite), either before, during, or after sampling. These daughter products can completely change the magnetic properties of limestone samples and if unrecognized may be one of the primary reasons why many paleomagnetic studies of limestones, especially Paleozoic limestones, are unsuccessful. Second, siderite in weakly magnetized rocks may indicate the potential for successful paleomagnetic results. Because the presence of siderite indicates that the primary magnetic carriers are still intact, appropriate demagnetization methods should yield successful results. We conclude that microenvironmental conditions in anoxic marine sediments may permit the formation of siderite from iron (II) produced during bacterial dissimilatory iron reduction. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.