Scavenging of volcanic aerosol by ash: Atmospheric and volcanologic implications

Abstract

Research Article| October 01, 1977 Scavenging of volcanic aerosol by ash: Atmospheric and volcanologic implications William I. Rose, Jr. William I. Rose, Jr. 1Department of Geology and Geological Engineering, Michigan Technological University, Houghton, Michigan 49931 Search for other works by this author on: GSW Google Scholar Author and Article Information William I. Rose, Jr. 1Department of Geology and Geological Engineering, Michigan Technological University, Houghton, Michigan 49931 Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1977) 5 (10): 621–624. https://doi.org/10.1130/0091-7613(1977)5<621:SOVABA>2.0.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 William I. Rose; Scavenging of volcanic aerosol by ash: Atmospheric and volcanologic implications. Geology 1977;; 5 (10): 621–624. doi: https://doi.org/10.1130/0091-7613(1977)5<621:SOVABA>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 initial concentrations of S (1,600 ppm) and Cl (1,100 ppm) in the high-Al2O3 basaltic magma from the 1974 eruptions of Fuego Volcano, Guatemala, were inferred from trapped glass inclusions in phenocrysts. During the explosive eruptions, as much as 33% of the S and 17% of the Cl fell quickly back to Earth as acid aerosol particles absorbed on the ash. An additional 5% of the S and 20% of the Cl was trapped in the silicate ash. The remaining S and Cl was released to the atmosphere. By estimating the volume of ash and applying the above values for S and Cl, 2.2 × 1011 g of S and 1.6 × 1011 g of Cl were calculated to be the atmospheric contribution of the 1974 Fuego eruption. These figures are minimum values because an undetermined amount of intrusive magma may have contributed volatiles to the eruption. Airborne in-the-plume measurements, together with the existing approaches, are the best way to eliminate this uncertainty. The absolute concentrations of scavenged elements on ash are seen to be a function of plume flux and particle trajectory, both of which vary greatly during an eruption. Intense pyroclastic activity produces higher S/Cl ratios in the coating acquired by the ash particles; this implies that there are higher S/Cl ratios in volcanic gas during more explosive phases of an eruption. 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.