Neutralization of atmospheric acidity by chemical weathering in an alpine drainage basin in the North Cascade Mountains

Research Article| March 01, 1986 Neutralization of atmospheric acidity by chemical weathering in an alpine drainage basin in the North Cascade Mountains James I. Drever; James I. Drever 1Department of Geology and Geophysics, University of Wyoming, Laramie, Wyoming 82071 Search for other works by this author on: GSW Google Scholar Douglas R. Hurcomb Douglas R. Hurcomb 1Department of Geology and Geophysics, University of Wyoming, Laramie, Wyoming 82071 Search for other works by this author on: GSW Google Scholar Author and Article Information James I. Drever 1Department of Geology and Geophysics, University of Wyoming, Laramie, Wyoming 82071 Douglas R. Hurcomb 1Department of Geology and Geophysics, University of Wyoming, Laramie, Wyoming 82071 Publisher: Geological Society of America First Online: 01 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1986) 14 (3): 221–224. https://doi.org/10.1130/0091-7613(1986)14<221:NOAABC>2.0.CO;2 Article history First Online: 01 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation James I. Drever, Douglas R. Hurcomb; Neutralization of atmospheric acidity by chemical weathering in an alpine drainage basin in the North Cascade Mountains. Geology 1986;; 14 (3): 221–224. doi: https://doi.org/10.1130/0091-7613(1986)14<221:NOAABC>2.0.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 The most important weathering reaction that neutralizes incoming atmospheric acidity in the South Cascade Lake basin is weathering of calcite, which occurs in trace amounts in veins, on joint surfaces, and as a subglacial surficial deposit. Although the basin is underlain by igneous and high-grade metamorphic rocks, weathering of plagioclase is quantitatively negligible; the principal silicate weathering reaction is alteration of biotite to vermiculite. These conclusions are based on mass-balance calculations involving runoff compositions and on mineralogical observations.For predictive modeling of the effects of increased acid deposition, it is essential to identify the relevant weathering reactions. Feldspar weathering is commonly not an important source of solutes in alpine basins underlain by granitic rocks. 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.