Nelia Dunbar
Activity Report 2007
Published Papers (prepare as complete reference citations and attach abstracts not previously submitted)
DUNBAR, N.W., MCINTOSH, W.C., AND ESSER, R.P., 2007, Physical setting and tephrochonology of the summit caldera ice record at Mt. Moulton, West Antarctica: Geological Society of America Bulletin, (in press).
PHILLIPS, E.H., GOFF, F., KYLE, P.R., MCINTOSH, W.C., DUNBAR, N.W., AND GARDNER, J.N., 2007, The Ar-40/Ar-39 age constraints on the duration of resurgence at the Valles caldera, New Mexico: Journal of Geophysical Research-Solid Earth, v. 112, p. B08201.
KARLSTROM, K.E., CROW, R.S., PETERS, L., MCINTOSH, W., RAUCCI, J., CROSSEY, L.J., UMHOEFER, P., AND DUNBAR, N., 2007, Ar-40/Ar-39 and field studies of Quaternary basalts in Grand Canyon and model for carving Grand Canyon: Quantifying the interaction of river incision and normal faulting across the western edge of the Colorado Plateau: Geological Society of America Bulletin, v. 119, p. 1283-1312.
SIMPSON, S.W., QUADE, J., KLEINSASSER, L., LEVIN, N., MACINTOSH, W., DUNBARS, N., AND SEMAW, S., 2007, Late miocene hominid teeth from Gona project area, Ethiopia: American Journal of Physical Anthropology, p. 219-219.
CROWE, R.S., KARLSTROM, K., MCINTOSH, W.C., PETERS, L., AND DUNBAR, N.W., 2007, History Of Quaternary Volcanism In Western Grand Canyon Based On Lidar Analysis, 40Ar/39Ar Dating, And Field Studies: Implications For Flow Stratigraphy, Timing Of Volcanic Events, And Lava Dam Stability: Geological Society of America Abstracts with Program, v. 2007 Annual Meeting, Denver, p. 66-12.
DUNBAR, N.W., MCINTOSH, W.C., KURBATOV, A.V., AND WILCH, T.I., 2007, Integrated Tephrochronology of the West Antarctic Region- Implications for a potential tephra record in the West Antarctic Ice Sheet (WAIS) Divide Ice Core: 2007 WAIS Divide Science Meeting.
DUNBAR, N.W., MCINTOSH, W.C., V., K.A., AND WILCH, T.I., 2007, Integrated tephrochronology of the West Antarctic region; implications for a potential tephra record in the West Antarctic ice sheet (WAIS) Divide ice core, in Cooper, A., and Raymond, C., eds., Tenth international symposium on Antarctic earth sciences; Antarctica; a keystone in a changing world, U. S. Geological Survey.
KONING, D.J., SMITH, G., CONNELL, S.D., SLATE, J.L., WOLDEGABRIEL, G., PETERS, L., MCINTOSH, W., DUNBAR, N., AND HORNING, R., 2007, Tectonic Evolution Of The Española Basin, Rio Grande Rift, North-Central New Mexico: Geological Society of America Abstracts with Program, v. 2007 Annual Meeting, Denver, p. 182-8.
POMPILIO, M., KYLE, P, WILCH, T.I., AND DUNBAR, N.W., 2007, The volcanic record in the ANDRILL McMurdo Ice Shelf AND-1B drill core, in Cooper, A., and Raymond, C., eds., Tenth international symposium on Antarctic earth sciences; Antarctica; a keystone in a changing world, U. S. Geological Survey.
ROSS, J., AND MCINTOSH, W.C., DUNBAR, N.W., 2007, Preliminary 40Ar/39Ar results from the AND-1B core, in Cooper, A., and Raymond, C., eds., Tenth international symposium on Antarctic earth sciences; Antarctica; a keystone in a changing world, U. S. Geological Survey.
SCANLAN, M., PANTER, K., AND DUNBAR, N., 2007, Evidence for magma mixing/mingling in lavas from Minna Bluff, South Victoria Land, in Cooper, A., and Raymond, C., eds., Tenth international symposium on Antarctic earth sciences; Antarctica; a keystone in a changing world, U.S. Geological Survey.
SLETTEN, R.S., MANN, D.H., McIntosh, W.C., DUNBAR, N.W., L., P.M., DICKINSON, W., and Stone, J.O., 2007, Possible redeposition of volcanic ashes in the Dry Valleys by glacier transport, in Cooper, A., and Raymond, C., eds., Tenth international symposium on Antarctic earth sciences; Antarctica; a keystone in a changing world, U. S. Geological Survey.
SWEENEY, D., PHLLIPS, E., MCLEMORE, V., DONAHUE, K., DUNBAR, N., AND HEIZLER, L., 2007, Petrographic techniques used to characterize Molycorp rock piles, Questa, New Mexico: New Mexico Geology, v. 29, p. 61.
WILCH, T.I., MCINTOSH, W.C., SMELLIE, J.L., DUNBAR, N.W., FARGO, A., SCANLAN, M.K., ROBERTS, P.D., AND PANTER, K.S., 2007, Late Miocene volcanism and glaciation at Minna Bluff, Antarcticaica, in Cooper, A., and Raymond, C., eds., Tenth international symposium on Antarctic earth sciences; Antarctica; a keystone in a changing world, U. S. Geological Survey.
WILSON, G.S., LEVY, R.H., BROWNE, G., DUNBAR, N.W., FLORINDO, F., HENRYS, S.A., GRAHAM, I., MCINTOSH, W.C., MCKAY, R.M., NAISH, T.R., OHNEISER, C., POWELL, R.D., ROSS, J.I., SAGNOTTI, L., SCHERER, R.P., SJUNNESKOG, C., STRONG, C.P., TAVIANI, M., AND WINTER, D.M., 2007, Chronostratigraphic constraints on Pliocene warmth and Pleistocene cooling in the ANDRILL-1B drillcore from beneath the McMurdo Ice Shelf, Antarctica.: EOS, Transactions of the American Geophysical Union, p. 88(52), Fall Meeting Supplement.
WILSON, G.S., LEVY, R.H., BROWNE, G., DUNBAR, N.W., FLORINDO, F., HENRYS, S.A., GRAHAM, I., MCINTOSH, W.C., MCKAY, R.M., NAISH, T.R., OHNEISER, C., POWELL, R.D., ROSS, J.I., SAGNOTTI, L., SCHERER, R.P., SJUNNESKOG, C., STRONG, C.P., TAVIANI, M., AND WINTER, D.M.,2007, Preliminary chronostratigraphy for the upper 700 m (upper Miocene-Pleistocene) of the AND-1B drillcore recovered from beneath the McMurdo Ice Shelf, Antarctica, in Cooper, A., and Raymond, C., eds., Tenth international symposium on Antarctic earth sciences; Antarctica; a keystone in a changing world, U. S. Geological Survey.
ZIMMERER, M.J., MCINTOSH, W.C., AND DUNBAR, N.W., 2007, The 40Ar/39Ar Geochronology and Thermochronology of the Latir Volcanic Field, New Mexco: Implications for Silicic Caldera Volcanism: New Mexico Geology, v. 29, p. 57.
Reports and Miscellaneous Publications (Unpublished reports; include reports of contract research; open-file reports etc.)
Journals Edited
Seminars and/or Speaking Engagements
Talk for Los Alamos National Laboratory Earth Science group (March 26)
Talk for Los Alamos Geological Society (April 17)
Talk for Santa Fe Geological Society (April 17)
Research Contracts and Grants Awarded (only title, not amounts to be posted on internet)
-NSF-OPP-. Subcontract. Characterization of the Volcanic Record in the ANDRILL MIS Core
-NSF-OPP-0636515. Collaborative Research: Collaborative Proposal: 2000+ Year Detailed, Calibrated Climate Reconstruction from a South Pole Ice Core Set in an Antarctic-Global Scale Context. Collaborative research with University of Maine
-NSF-OPP-0636767. Collaborative Research: Microparticle/tephra analysis of the WAIS Divide ice core. Collaborative research with University of Maine
Research Contracts and Grants Proposed
Development of Monazite Geochronology and Trace Element Analysis Using a Cameca Sx-100 Electron Microprobe
Collaborative Research: IPY: Volcanic Ashes in the Dry Valleys: Eruptive Ages versus Depositional Ages and the Stabilist-Dynamicist Debate
Awards and Other Recognitions
Service on Graduate Student Committees (list student and title of project and if you are major supervisor)
Committee member for Ariel Dickens (MS). Investigation of Ar dating systematics of obsidian
Committee member for Dawn Sweeney (MS). Gas emissions of Mt. Erebus volcano
Committee member for Christine Kimball (MS). Mt. Erebus anorthoclase feldspar
Committee member for Marsha Barton (MST). Field-based geology lesson plans
Committee member for Jake Ross (MS). Chronology of the ANDRILL core
Committee member for Matt Zimmerer (MS). Chronology and geochemistry of the Latir Volcanic field
Committee member for Shasta McGee (PhD). Cosmogenic investigations as part of CHRONOS project.
Courses Taught
Theory and Practice of Electron Microprobe Analysis (GEOC 589). Spring and Fall 2007
Continuing Education Courses Given/Taken
Wilderness First Aid (Oct. 4)
Service on Institute Committees
Service in Professional Societies (it is your choice whether you wish to include this information on internet site)
Member of American Geophysical Union
Member of Microbeam Analysis Society
Member of New Mexico Microbeam Users Group
Service on Commissions/Councils/Boards
Member of Antarctic Glaciology Data Center advisory board
Member of advisory board for deep field fixed wing aircraft operations in Antarctica
Bureau Service Projects Active This Period
-Member of building committee
-Associate Director for laboratories
-Maintenance of Electron Microprobe and Carrizozo Malpais Web site http://geoinfo.nmt.edu/staff/dunbar/carrizozo/carrizozo.html
-Bureau Equipment Committee member
-Member of the Geological Editorial Board for Lite Geology
-Assisting numerous Bureau 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.
-Answering various phone calls and other inquiries about volcanoes, earthquakes, and other aspects of New Mexico geology.
-Provided letters of support and information for Bureau proposals, particularly relative to electron microprobe laboratory.
Research Projects Active This Period
*Investigation of the long-term stability of waste rock piles at the Molycorps/Questa Mine
*Tephrochronology, chemical fingerprinting, and correlation of tephra layers in ancestral Rio Grande sediments. (in conjunction with D. Love, S. Connell, S. Cather, W. McIntosh, and others)
*Cosmogenic exposure dating of young basalts in New Mexico
*Englacial tephrochronology of blue ice areas of Antarctica: Implication to ice sheet history and ice-bound climate records.
*Tephrochronology of the Siple and Taylor Dome Ice Cores.
*Tephrochronology of the South Pole SPRESSO Core.
*Tephrochronology of the WAIS Divide Core.
*Tephrochronology of the ANDRILL Core.
*Investigation of the volcanic geology of Minna Bluff, Antarctica
Public Service/Education and Outreach
--Co-lead field trip for the French International Lycee in Washington DC (Feb 28)
-Participated in E&ES graduate student recruitment weekend (mid March)
-Gave talk for 3rd grade class (May 15)
-Led International field trip in Jemez Mountains (24-26 August)
-Assisting numerous non-Bureau researchers and students with sample preparation for, and collection and presentation of electron microprobe and scanning electron microscope analyses. Also, assisted researchers at other institutions with electron microprobe questions.
-Provided tours of the electron microprobe facility for New Mexico Tech alumni, New Mexico Tech classes, visiting prospective students, and other educational groups.
-Answering various phone calls and other inquiries about volcanoes, earthquakes, and other aspects of New Mexico geology.
-Giving talks about geology to school groups.
-Adjunct Appointment to E&ES Department -Provided letters of support and information for non-Bureau proposals, particularly relative to electron microprobe laboratory.