Nelia Dunbar

Papers presented at professional meetings:
Dunbar, N.W., 1998. Cl36 dating of the upper and lower Carrizozo lava flows, southcentral New Mexico. New Mexico Geology, 20, 53.

Horning, R.R., Dunbar, N.W., Kyle, P.R., and Baldridge, W.S., 1998. Evolution and emplacement of an unusual veined tephritebasanite intrusion at El Porticito, NM. Geol. Soc. Am. Abstr. Programs, 30, 10.

Person, M., Mailloux, B., Dunbar, N., Strayer, L., Cather, S., Kelly, S., and Hudleston, P., 1998. Tectonic controls on the hydrothermal evolution of the Rio Grande Rift, New Mexico. 1998 AAPG Annual Convention Abstract, Salt Lake City, Utah, May 1728, 1998.

Sigurdsson, H., McIntosh, W.C., Dunbar, N.W., Lacasse, C., and Carey, S., 1998. Thorsmork Ignimbrite in Iceland: Possible source of North Atlantic ash. EOS, Trans. AGU, 1998 Spring Meeting, V51A08.

Seminars:
History of the West Antarctic ice sheet as revealed through investigation of englacial tephra layers. Presented for 5College Volcanology seminar. March 6, 1998.

Research Contracts and Grants Awarded:
Late Pleistocene inland West Antarctic Ice Sheet elevations at Mt. Takahe. $52,472 to New Mexico Tech.

Research Contracts and Grant Proposed:
Contaminant volatilization behavior during vitrification of silicate waste material. Submitted to DOE

Examination of the 500,000year climate record in ice at Mt. Moulton, West Antarctica. Submitted to NSF

Graduate Student Projects
Committee member for Sarah Wilson's M.S. thesis project on "40Ar/39Ar dating of fluid inclusions"

Committee member for Natalie Latysh's M.S. thesis project on "Evolution and Structure of the Colorado Plateau

Committee member for Alan Eschenbacher's M.S. thesis project on "Volatile evolution of Mount Erebus Magma.

Committee member for Peter Rinkleff's M.S. thesis project on "Geochemical and petrologic evolution of the Kuril Lake Caldera Ignimbrite, Kamchatka, Russia: Implications for magma chamber zonation and caldera formation.

Committee member for Lisa Laumann's M.S. thesis project on "Statistical methods in tephrochronology"

Committee member for Jerzy Kulis's PhD thesis project on infrared microscopic and geochemical analysis of pyrite.

Courses Taught:
Geochem 589. Spring 1998. "Theory and Practice of Electron Microprobe Analysis" class. 8 students during the fall semester.

Bureau Service Projects:
Bureau Equipment Committee member
Member of the Geological Editorial Board for Lite Geology
Geochemistry research group organizer

Active Research Projects:

• Chemical and mineralogical alteration associated with potassium metasomatism in the Socorro, NM area

• Dating of mineralization in the Capitan pluton using Ar40/Ar39
• Tephrochronology, chemical fingerprinting, and correlation of tephra layers in ancestral Rio Grande sediments.
• Exposureage dating of young basalts in the ZuniBandera Volcanic field.
• Investigation of the preeruptive volatile composition and chemistry of the Peralta Tuff, Jemez Mountains, New Mexico. Collaborative research with T. Spell and L. Justet, UNLV.
• Investigation of the eruptive history, chemical composition, magmatic evolution, and chronology of the Los Lunas Volcano, New Mexico. Collaborative research w/ D. Love, W. McIntosh, K. Panter.

• Uplift rates of the Tibetan plateau
• Tephras in blue ice areas of Antarctica
• Geochemistry and mineralogy of El Porticito segregation veins

Public service/education and other accomplishments

• Assisting numerous researchers and students with sample preparation for, and collection and presentation of electron microprobe and scanning electron microscope analyses.
• Providing tours of the electron microprobe facility for New Mexico Tech alumni, New Mexico Tech classes, and visiting educational groups.
• Adjunct Appointment to E&ES Department, serving as adjunct representative for appointment of the next E&ES Department Chair.
• Assistance of Park Service in preparation of displays for the new "City of Rocks" State Park visitor center.
• Answering various phone calls and other inquiries about volcanoes, earthquakes, and other aspects of New Mexico geology.
• Judging senior environmental science division of State Science Fair.