Constraints on magma ascent, emplacement, and eruption: Geochemical and mineralogical data from drill-core samples at Obsidian dome, Inyo chain, California

Abstract

Research Article| May 01, 1987 Constraints on magma ascent, emplacement, and eruption: Geochemical and mineralogical data from drill-core samples at Obsidian dome, Inyo chain, California Thomas A. Vogel; Thomas A. Vogel 1Department of Geological Sciences, Michigan State University, East Lansing, Michigan 48824 Search for other works by this author on: GSW Google Scholar Leland W. Younker; Leland W. Younker 2Earth Sciences Department, Lawrence Livermore National Laboratory, Livermore, California 94550 Search for other works by this author on: GSW Google Scholar Benjamin C. Schuraytz Benjamin C. Schuraytz 3Department of Geological Sciences, Michigan State University, East Lansing, Michigan 48824 Search for other works by this author on: GSW Google Scholar Author and Article Information Thomas A. Vogel 1Department of Geological Sciences, Michigan State University, East Lansing, Michigan 48824 Leland W. Younker 2Earth Sciences Department, Lawrence Livermore National Laboratory, Livermore, California 94550 Benjamin C. Schuraytz 3Department of Geological Sciences, Michigan State University, East Lansing, Michigan 48824 Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1987) 15 (5): 405–408. https://doi.org/10.1130/0091-7613(1987)15<405:COMAEA>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 Email Permissions Search Site Citation Thomas A. Vogel, Leland W. Younker, Benjamin C. Schuraytz; Constraints on magma ascent, emplacement, and eruption: Geochemical and mineralogical data from drill-core samples at Obsidian dome, Inyo chain, California. Geology 1987;; 15 (5): 405–408. doi: https://doi.org/10.1130/0091-7613(1987)15<405:COMAEA>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 Systematic chemical and mineralogical variability occurs in samples from drill holes through Obsidian dome, the conduit to the dome, and a nearby associated feeder dike. The drill-hole samples from the margins of the conduit and most of the lower part of the dome are high-Ba, low-silica rhyolites; they contain two populations of phenocrysts and represent commingled magmas, whereas samples from the dike and upper parts of the dome are low-Ba, higher silica rhyolites that do not reflect commingled magmas. Samples from the center of the conduit are low-Ba, higher silica rhyolites that are only slightly mixed. A major part of the variability within the drill-core samples of the dome and conduit reflects the juxtaposition and commingling of two distinct magmas during their passage through the conduit. 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.