Calibration of the δ18O paleothermometer for dolomite precipitated in microbial cultures and natural environments

Abstract

Research Article| April 01, 2005 Calibration of the δ18O paleothermometer for dolomite precipitated in microbial cultures and natural environments Crisogono Vasconcelos; Crisogono Vasconcelos 1Geological Institute, ETH-Zürich, CH-8092 Zürich, Switzerland Search for other works by this author on: GSW Google Scholar Judith A. McKenzie; Judith A. McKenzie 1Geological Institute, ETH-Zürich, CH-8092 Zürich, Switzerland Search for other works by this author on: GSW Google Scholar Rolf Warthmann; Rolf Warthmann 1Geological Institute, ETH-Zürich, CH-8092 Zürich, Switzerland Search for other works by this author on: GSW Google Scholar Stefano M. Bernasconi Stefano M. Bernasconi 1Geological Institute, ETH-Zürich, CH-8092 Zürich, Switzerland Search for other works by this author on: GSW Google Scholar Geology (2005) 33 (4): 317–320. https://doi.org/10.1130/G20992.1 Article history received: 13 Jul 2004 rev-recd: 09 Dec 2004 accepted: 10 Dec 2004 first online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Crisogono Vasconcelos, Judith A. McKenzie, Rolf Warthmann, Stefano M. Bernasconi; Calibration of the δ18O paleothermometer for dolomite precipitated in microbial cultures and natural environments. Geology 2005;; 33 (4): 317–320. doi: https://doi.org/10.1130/G20992.1 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 Decades of various and numerous isotopic studies to interpret the environmental conditions of dolomite formation proved to be inconclusive because the temperature-dependent oxygen isotope fractionation factor between dolomite and the solution from which it precipitated could not be determined experimentally at low temperatures. With the discovery of bacteria that mediate the precipitation of dolomite, it is now possible to overcome kinetic barriers and precipitate dolomite under controlled temperature conditions in culture experiments. Herein we report on the results of microbial experiments that have enabled us to calibrate the dolomite-water oxygen isotope fractionation factor and provide a paleothermometer to evaluate conditions of ancient dolomite formation. The temperature (T) dependence of the fractionation is defined by the equation: 1000 ln αdolomite-water = 2.73 × 106T−2 + 0.26. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.