Eruption chronology and petrologic reconstruction of the ca. 8500 yr B.P. eruption of Red Cones, southern Inyo chain, California

Abstract

Research Article| September 01, 2010 Eruption chronology and petrologic reconstruction of the ca. 8500 yr B.P. eruption of Red Cones, southern Inyo chain, California Brandon Browne; Brandon Browne † 1Department of Geological Sciences, California State University, Fullerton, California 92834, USA †E-mail: bbrowne@fullerton.edu Search for other works by this author on: GSW Google Scholar Marcus Bursik; Marcus Bursik 2Department of Geology, State University of New York, Buffalo, New York 14260, USA Search for other works by this author on: GSW Google Scholar Justin Deming; Justin Deming 2Department of Geology, State University of New York, Buffalo, New York 14260, USA Search for other works by this author on: GSW Google Scholar Michael Louros; Michael Louros 1Department of Geological Sciences, California State University, Fullerton, California 92834, USA Search for other works by this author on: GSW Google Scholar Antonio Martos; Antonio Martos 1Department of Geological Sciences, California State University, Fullerton, California 92834, USA Search for other works by this author on: GSW Google Scholar Scott Stine Scott Stine 3Department of Geography and Environmental Studies, California State University, Hayward, California 94542, USA Search for other works by this author on: GSW Google Scholar Author and Article Information Brandon Browne † 1Department of Geological Sciences, California State University, Fullerton, California 92834, USA Marcus Bursik 2Department of Geology, State University of New York, Buffalo, New York 14260, USA Justin Deming 2Department of Geology, State University of New York, Buffalo, New York 14260, USA Michael Louros 1Department of Geological Sciences, California State University, Fullerton, California 92834, USA Antonio Martos 1Department of Geological Sciences, California State University, Fullerton, California 92834, USA Scott Stine 3Department of Geography and Environmental Studies, California State University, Hayward, California 94542, USA †E-mail: bbrowne@fullerton.edu Publisher: Geological Society of America Received: 06 Apr 2009 Revision Received: 30 Oct 2009 Accepted: 01 Nov 2009 First Online: 08 Mar 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 © 2010 Geological Society of America GSA Bulletin (2010) 122 (9-10): 1401–1422. https://doi.org/10.1130/B30070.1 Article history Received: 06 Apr 2009 Revision Received: 30 Oct 2009 Accepted: 01 Nov 2009 First Online: 08 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 Brandon Browne, Marcus Bursik, Justin Deming, Michael Louros, Antonio Martos, Scott Stine; Eruption chronology and petrologic reconstruction of the ca. 8500 yr B.P. eruption of Red Cones, southern Inyo chain, California. GSA Bulletin 2010;; 122 (9-10): 1401–1422. doi: https://doi.org/10.1130/B30070.1 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 SocietyGSA Bulletin Search Advanced Search Abstract Red Cones are a pair of basaltic cinder cones located 5 km SSW of Mammoth Mountain at the southern end of the Mono-Inyo volcanic chain, in eastern California. Charcoal recovered at two separate locations beneath the Red Cones scoria-fall deposits indicates that the eruption most likely occurred shortly after 8490 ± 90 14C yr B.P. and no later than 9325 ± 83 14C yr B.P., which implicates Red Cones as the most recent eruption of basalt in the Mono-Inyo volcanic chain. Results from geologic field mapping combined with geochemical and petrologic analysis suggest that the ca. 8500 yr B.P. eruption produced 10.1 × 106 m3 of magma, possibly beginning from south Red Cone and later from north Red Cone via Hawaiian, Strombolian, and violent Strombolian eruptions over a minimum of 28 days. All deposits contain plagioclase, olivine, clinopyroxene, chrome-spinel, and titanomagnetite. Material erupted from each cone can be classified as high-aluminum basalts that exhibit calc-alkaline differentiation trends and belong to the medium-K series. Red Cone basalt samples are generally similar in terms of many major and trace element concentrations, but south Red Cone samples typically contain more SiO2, Sr, Zr, Rb, and Ba, and less MgO, FeO, CaO, Ni, and Cr than north Red Cone samples. Clinopyroxene-liquid thermobarometry calculations indicate that the majority of Red Cones clinopyroxene crystal cores crystallized at temperatures of 1160–1210 °C and pressures equivalent to 10–25 km depth, which supports the possibility of a basaltic dike and sill plexus located 10–25 km beneath the west and southwest flanks of Mammoth Mountain. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.