Research Article| May 01, 1990 Dolomite formation in anoxic sediments of Kau Bay, Indonesia Jack J. Middelburg; Jack J. Middelburg 1Department of Geochemistry, Institute of Earth Sciences, University of Utrecht, P.O.Box 80.021, NL 3508 TA Utrecht, The Netherlands Search for other works by this author on: GSW Google Scholar Gert J. de Lange; Gert J. de Lange 1Department of Geochemistry, Institute of Earth Sciences, University of Utrecht, P.O.Box 80.021, NL 3508 TA Utrecht, The Netherlands Search for other works by this author on: GSW Google Scholar Rob Kreulen Rob Kreulen 1Department of Geochemistry, Institute of Earth Sciences, University of Utrecht, P.O.Box 80.021, NL 3508 TA Utrecht, The Netherlands Search for other works by this author on: GSW Google Scholar Author and Article Information Jack J. Middelburg 1Department of Geochemistry, Institute of Earth Sciences, University of Utrecht, P.O.Box 80.021, NL 3508 TA Utrecht, The Netherlands Gert J. de Lange 1Department of Geochemistry, Institute of Earth Sciences, University of Utrecht, P.O.Box 80.021, NL 3508 TA Utrecht, The Netherlands Rob Kreulen 1Department of Geochemistry, Institute of Earth Sciences, University of Utrecht, P.O.Box 80.021, NL 3508 TA Utrecht, The Netherlands Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1990) 18 (5): 399–402. https://doi.org/10.1130/0091-7613(1990)018<0399:DFIASO>2.3.CO;2 Article history First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Jack J. Middelburg, Gert J. de Lange, Rob Kreulen; Dolomite formation in anoxic sediments of Kau Bay, Indonesia. Geology 1990;; 18 (5): 399–402. doi: https://doi.org/10.1130/0091-7613(1990)018<0399:DFIASO>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 Authigenic dolomite layers occur in the organic matter-rich sediments of Kau Bay, Indonesia. Dolomite formation is related to the anaerobic decomposition of organic matter which causes depletion of pore-water sulfate and increase in interstitial water alkalinity. X-ray diffractograms of Kau Bay dolomites show sharply defined peaks, including the superstructure reflections. Carbon isotopes indicate that a significant portion of the carbon is derived from the degradation of organic matter. The pore waters are highly supersaturated with dolomite, but at greater depths, pore waters are undersaturated or are near saturation with calcite and aragonite. Dolomite seems to have formed by direct precipitation from solution. The formation of dolomite is believed to be initiated by the high alkalinity levels found in the zone of anoxic methane oxidation. The rate of dolomite formation is controlled by the supply of calcium and is on the order of a few centimetres per 1 ka. 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.