A Further Contribution to the Petrology of Haleakala Volcano, Hawaii

Abstract

Research Article| July 01, 1968 A Further Contribution to the Petrology of Haleakala Volcano, Hawaii GORDON A MACDONALD; GORDON A MACDONALD Institute of Geophysics, University of Hawaii, Honolulu, Hawaii Search for other works by this author on: GSW Google Scholar HOWARD A POWERS HOWARD A POWERS U.S. Geological Survey, Hawaiian Volcano Observatory. Hawaii National Park P. O., Hawaii Search for other works by this author on: GSW Google Scholar Author and Article Information GORDON A MACDONALD Institute of Geophysics, University of Hawaii, Honolulu, Hawaii HOWARD A POWERS U.S. Geological Survey, Hawaiian Volcano Observatory. Hawaii National Park P. O., Hawaii Publisher: Geological Society of America Received: 14 Sep 1967 First Online: 02 Mar 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Copyright © 1968, The Geological Society of America, Inc. Copyright is not claimed on any material prepared by U.S. government employees within the scope of their employment. GSA Bulletin (1968) 79 (7): 877–888. https://doi.org/10.1130/0016-7606(1968)79[877:AFCTTP]2.0.CO;2 Article history Received: 14 Sep 1967 First Online: 02 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 GORDON A MACDONALD, HOWARD A POWERS; A Further Contribution to the Petrology of Haleakala Volcano, Hawaii. GSA Bulletin 1968;; 79 (7): 877–888. doi: https://doi.org/10.1130/0016-7606(1968)79[877:AFCTTP]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 SocietyGSA Bulletin Search Advanced Search Abstract Sixteen new chemical analyses of the later rocks of Haleakala Volcano, on the island of Maui, Hawaii, add to the differentiation picture for that volcano. The early rocks of the volcano are tholeiitic. These are followed by dominant hawaiites with less abundant alkalic olivine basalts, picrite-basalts of ankaramite type, and a few mugearites. Still later rocks, separated from earlier ones by a profound erosional unconformity, include some hawaiites and ankaramites, but are dominantly alkalic olivine basalts (basanitoids) containing as much as 16.5 percent normative nepheline, some of them transitional to ankaramite. The progression toward ultramafic, strongly undersaturated rocks (nephelinites), characteristic of the post-erosional lavas of other Hawaiian volcanoes, appears to have just begun at Haleakala. 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.