Center for Volcanic and Tectonic Studies: 1992--1993 annual report

Abstract

Government. Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. The Views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof. ORGANIZATION OF THE ANNUAL REPORT OF THE CENTER FOR VOLCANIC & TECTONIC STUDIES (CVTS)(sections separated by colored paper) INTRODUCTION CVTS Activities CVTS Staff CVTS Bibliography-1993-1994 Future Directions CONTRIBUTION OF E.I. SMITH PaperThe role of the mantle during crustal extension: constraints from the geochemistry of volcanic rocks in the Lake Mead area: Nevada and Arizona (Reprint from December '93 Geological Society of America Bulletin) . Abstracts of presentations CONTRIBUTION OF T.K. BRADSHAWPaper Polygenetic volcanism at Crater Flat, Nevada (Manuscript in review for publication in the Journal of Volcanology and Geothermal Research)Further Geochemical modeling: Crater Flat. PaperBasaltic volcanism in the southern Bash and Range: no role for a mantle plume.(Reprint from Earth and Planetary Sciences Letters) Abstracts of presentations Data tables for chemical analyses Final thoughts CONTRIBUTION OF G.M. YOGODZINSKI:Summary of CVTS efforts in the Reveille Range, south-central Nevada PaperMagmatism and tectonic development of the western Aleutians: an oceanic arc in a strikeslip setting.(Reprint of paper published in the July '93 Journal of Geophysical Research) Abstracts of presentations CONTRIBUTION OF S.A. MORIKAWA Masters of Science ThesisThe Geology of the Tuff of Bridge Spring: Southern Nevada and Northwestern Arizona.".. INTRODUCTIONThe annual report of the Center for Volcanic Studies (CVTS) contains a series of papers, reprints and a Master of Science thesis that review the progress made by the CVTS between October 1,1992 and February 1,1994. During this period CVTS staff focused on several topics that have direct relevance to volcanic hazards related to the proposed high-level nuclear waste repository at Yucca Mountain, Nevada. These topics include:(1) PoIygenetic/polycyclic volcanism in Crater Flat, Nevada(2) The role of the mantle during crustal extension.(3) The detailed geology of Crater Flat, Nevada.(4) Pliocene volcanoes in the Reveille Range, south-central Nevada.(5) Estimating the probability of disruption of the proposed repository by volcanic eruptions. This topic is being studied by Dr. C.H. Ho at UNLV. CVTS ActivitiesCVTS staff presented papers at several professional meetings including:(a) International Associati...