Magmatic sulfur compounds and sulfur diffusion in albite melt at 1 GPa and 1300-1500 degrees C

Other| December 01, 1998 Magmatic sulfur compounds and sulfur diffusion in albite melt at 1 GPa and 1300-1500 degrees C K. Tobias Winther; K. Tobias Winther Rensselaer Polytechnic Institute, Department of Earth and Environmental Sciences, Troy, NY, United States Search for other works by this author on: GSW Google Scholar E. Bruce Watson; E. Bruce Watson Search for other works by this author on: GSW Google Scholar Gerald M. Korenowski Gerald M. Korenowski Search for other works by this author on: GSW Google Scholar Author and Article Information K. Tobias Winther Rensselaer Polytechnic Institute, Department of Earth and Environmental Sciences, Troy, NY, United States E. Bruce Watson Gerald M. Korenowski Publisher: Mineralogical Society of America First Online: 02 Mar 2017 Online ISSN: 1945-3027 Print ISSN: 0003-004X GeoRef, Copyright 2004, American Geological Institute. American Mineralogist (1998) 83 (11-12_Part_1): 1141–1151. https://doi.org/10.2138/am-1998-11-1201 Article history 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 K. Tobias Winther, E. Bruce Watson, Gerald M. Korenowski; Magmatic sulfur compounds and sulfur diffusion in albite melt at 1 GPa and 1300-1500 degrees C. American Mineralogist 1998;; 83 (11-12_Part_1): 1141–1151. doi: https://doi.org/10.2138/am-1998-11-1201 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 SocietyAmerican Mineralogist Search Advanced Search Abstract The speciation and diffusion of sulfur in nominally dry albite melt at 1300-1500 degrees C has been investigated by analyzing glasses formed in piston-cylinder runs using electron microprobe, micro-Raman, infrared-, UV-, and visible-light-spectroscopy, and other techniques. The sulfate ion is very stable in the albite melt even at low f O2 and is the dominant species in all glasses. In the presence of graphite the glass acquired a characteristic strong violet color, as a consequence of conversion of some of the sulfate to S 2 (super -) and S 3 (super -) radical anions. The equilibration between S 2 (super -) and S 3 (super -) was rapid and both radicals were found to be very stable at elevated temperatures. Both S 2 (super -) , S 3 (super -) , and sulfide diffuse faster then the sulfate anion, so these species will control the diffusion process when present. In violet-colored albite glass in which some of the sulfur is S 2 (super -) and S 3 (super -) , the diffusion coefficient for bulk sulfur diffusion was found to be: D = 14.7 exp(-458100 J.mol (super -1) /RT)m 2 /s where T is the temperature in K and R the gas constant. This relation defines D values significantly lower than those determined for sulfur in dry andesite, dacite, and rhyolite melt, in which the diffusion is controlled by sulfide. The reason for this difference is the higher degree of melt polymerization, the stabilization of sulfate over sulfide in the albite melt, and the slow diffusion of S 2 (super -) and S 3 (super -) radical anions compared to sulfide. 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.