An Alkali-Basalt through Trachyte Suite, Mesa Chivato Mount Taylor volcanic Field, New Mexico

Abstract

Research Article| May 01, 1980 An Alkali-Basalt through Trachyte Suite, Mesa Chivato Mount Taylor volcanic Field, New Mexico L. S. Crumpler L. S. Crumpler 1Department of Planetary Sciences, University of Arizona, Tucson, Arizona 85721 Search for other works by this author on: GSW Google Scholar Author and Article Information L. S. Crumpler 1Department of Planetary Sciences, University of Arizona, Tucson, Arizona 85721 Publisher: Geological Society of America Received: 08 Mar 1979 Revision Received: 10 Dec 1979 Accepted: 13 Dec 1979 First Online: 02 Mar 2017 Online Issn: 1943-2674 Print Issn: 0016-7606 © 1980 The Geological Society of America, Inc. GSA Bulletin (1980) 91 (5_Part_II): 1293–1331. https://doi.org/10.1130/GSAB-P2-91-1293 Article history Received: 08 Mar 1979 Revision Received: 10 Dec 1979 Accepted: 13 Dec 1979 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 L. S. Crumpler; An Alkali-Basalt through Trachyte Suite, Mesa Chivato Mount Taylor volcanic Field, New Mexico. GSA Bulletin 1980;; 91 (5_Part_II): 1293–1331. doi: https://doi.org/10.1130/GSAB-P2-91-1293 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 A complete alkali basalt through trachyte volcanic suite has been documented from the central part of the Mount Taylor volcanic field, New Mexico (the southeast margin of the Colorado Plateau) showing mineralogic, chemical, and field relations similar to alkalic volcanism of both continental and oceanic settings throughout the world. Thus, the Mount Taylor field is fundamentally distinct from the predominantly calc-alkalic to low-Ti alkali basaltic volcanism of the Basin and Range Provice as a whole.Eruptions of the rocks began in Pliocene-Pleistocene time with alkali basalt (basanatoid) and continued through intermediate (hawaiite, mugearite, benmorite) and trachyte compositions. This progression, together with minor-element and isotopic data, suggests that the suite evolved by fractional crystallization of basaltic magmas.Volcanologic diversity of the field is illustrated by the variety of land forms, including numerous maars, pit craters, silicic flow-domes, and distinct northeasterly oriented fissures. Northeast-southwest oriented faults with as much as 30-m displacements were active concurrently with the volcanism, and several faults are superposed on fissure lines, suggesting that the volcanism was a consequence of deep fracturing of the margin of the Colorado Plateau by late Cenozoic Basin and Range faulting. 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.