Fate of silicate minerals in a peat bog

Abstract

Research Article| April 01, 1991 Fate of silicate minerals in a peat bog Philip C. Bennett; Philip C. Bennett 1Department of Geological Sciences, University of Texas, Austin, Texas 78713 Search for other works by this author on: GSW Google Scholar Donald I. Siegel; Donald I. Siegel 2Department of Geology, Syracuse University, Syracuse, New York 13244 Search for other works by this author on: GSW Google Scholar Barbara M. Hill; Barbara M. Hill 2Department of Geology, Syracuse University, Syracuse, New York 13244 Search for other works by this author on: GSW Google Scholar Paul H. Glaser Paul H. Glaser 3Limnological Research Center, University of Minnesota, Minneapolis, Minnesota 55455 Search for other works by this author on: GSW Google Scholar Author and Article Information Philip C. Bennett 1Department of Geological Sciences, University of Texas, Austin, Texas 78713 Donald I. Siegel 2Department of Geology, Syracuse University, Syracuse, New York 13244 Barbara M. Hill 2Department of Geology, Syracuse University, Syracuse, New York 13244 Paul H. Glaser 3Limnological Research Center, University of Minnesota, Minneapolis, Minnesota 55455 Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1991) 19 (4): 328–331. https://doi.org/10.1130/0091-7613(1991)019<0328:FOSMIA>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 Email Permissions Search Site Citation Philip C. Bennett, Donald I. Siegel, Barbara M. Hill, Paul H. Glaser; Fate of silicate minerals in a peat bog. Geology 1991;; 19 (4): 328–331. doi: https://doi.org/10.1130/0091-7613(1991)019<0328:FOSMIA>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 An investigation of silicate weathering in a Minnesota mire indicates that quartz and aluminosilicates rapidly dissolve in anoxic, organic-rich, neutral- pH environments. Vertical profiles of pH, dissolved silicon, and major cations were obtained at a raised bog and a spring fen and compared. Profiles of readily extractable silicon, diatom abundance, ash mineralogy, and silicate surface texture were determined from peat cores collected at each site.In the bog, normally a recharge mound, dissolved silicon increases with depth as pH increases, exceeding the background silicon concentration by a factor of two. Silicate grain surfaces, including quartz, are chemically etched at this location, despite being in contact with pore water at neutral pH with dissolved silicon well above the equilibrium solubility of quartz. The increasing silica concentrations at circum-neutral pH are consistent with a system where silicate solubility is influenced by silica-organic-acid complexes. Silica-organic-acid complexes therefore may be the cause of the almost complete absence of diatoms in decomposed peat and contribute to the formation of silica-depleted underclays commonly found beneath coal. 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.