Nelia Dunbar Bi-annual activity report (2000-2001)

See my home page for links to abstracts

Published Papers

Campbell, A., S. Lundberg, and N. Dunbar, 2000, Solid inclusions of halite in quartz: evidence for the halite trend: Chemical Geology, v. 173, p. 179-191..

Dunbar, N., 2001, Past volcanism in Northern New Mexico- Key to understanding potential future activity: New Mexico Decision Field guide, v. 1, p. 95-96.

Dunbar, N., and F. Phillips, in press, Cosmogenic 36Cl ages of lava flows in the Zuni-Bandera volcanic field, north-central New Mexico, USA, in press,: New Mexico Bureau of Mines and Mineral Resources Bulletin.

Dunbar, N., D. Voisins, and G. Zielinski, submitted, Tephra layers in the Siple and Taylor Dome Ice Cores, Antarctica: Correlations and Sources.

Ennis D.J., D. N. W., Campbell A.R., Chapin C.E., 2000, The effects of K-metasomatism on the mineralogy and geochemistry of silicic ignimbrites near Socorro, New Mexico,: Chemical Geology, v. 167, p. 285-312.

Hawley, R. L., E. D. Waddington, D. L. Morse, N. W. Dunbar, and G. A. Zielinski, 2002, Dating firn cores by vertical strain measurements: Journal of Glaciology, submitted.

McLemore, V., Dunbar, N., and McIntosh, W., 2000, Rockhound State Park and Spring Canyon Recreation Area: New Mexico Geological Society Guidebook, v. 51, p. 33-34.

McLemore, V., and Dunbar, N., 2000, Rockhound State Park and Spring Canyon Recreation Area: New Mexico Geology, v. 22, no. 3, p. 66-71.

McLemore, V., N. Dunbar, P. Kosunen, T. Rämö, M. Heizler, and I. Haapala, in press, Geology and Geochemistry Of The Redrock Granite and Anorthosite Xenoliths (Proterozoic) in the Northern Burro Mountains, Grant County, New Mexico, USA: Bulletin of Geological Society of Finland.

McLemore, V. T., Dunbar, N., Heizler, M. T., and Donahue, K., 2000, Geology and mineral deposits of the Victorio Mining district, Luna County, New Mexico: Preliminary observations: New Mexico Geological Society Guidebook, v. 51, p. 267-278.

Munroe, E. A., McLemore, V., and Dunbar, N., 2000, Mine waste rock pile geochemistry and mineralogy in southwestern New Mexico: ICARD 2000, Proceedings from the 5th Annual Conference on Acid Rock Drainage p. 1327-1336.

Wardell, L., P. Kyle, N. Dunbar, and B. Christenson, 2000, White Island Volcano, New Zealand: Carbon dioxide and sulfur emission rates, and melt inclusions studies: Chemical Geology, v. 177, p. 187-200.

Winick, J. A., W. C. McIntosh, and N. W. Dunbar, 2001, Melt-inclusion-hosted excess Ar-40 in quartz crystals of the Bishop and Bandelier magma systems: Geology, v. 29, p. 275-278.

 

Papers Presented at Professional Meetings

Aster, R., S. Muh, J. Johnson, P. Kyle, W. McIntosh, N. Dunbar, M. Ruiz, and E. Desmarias, 2001, Seismic, acoustic, and video observations of conduit processes during Strombolian explosions at Mount Erebus, Antarctica: EOS, Transactions of the American Geophysical Union, v. 82, p. F1413.

Connell, S., S. Cather, W. McIntosh, N. Dunbar, K. Koning, and R. Tedford, 2001, Stratigraphy of the Lower Santa Fe group deposits in the Hagan embayment and near Zia Pueblo, New Mexico- Implications for oligo-miocene development of the Albuquerque Basin: New Mexico Geology, v. 23, p. 60.

Connell, S., D. Love, P. Jackson-Paul, S. Lucas, G. Morgan, R. Chamberlin, W. McIntosh, and N. Dunbar, 2001, Stratigraphy of the Sierra Ladrones formation type area, southern Albuquerque basin, Socorro County, New Mexico- Preliminary results: New Mexico Geology, v. 23, p. 59.

Dunbar, N., 2000, Applications of global positioning system (GPS) to earth science problems: New Mexico Geology, v. 22, p. 54.

Dunbar, N.W., 2001, Cosmogenic Cl-36 dating of the young basaltic lava flow in New Mexico: Carrizozo and Zuni-Bandera Volcanic Fields. Symposium on Volcanoes and Volcanology of New Mexico held at the New Mexico Museum of Natural History, Feb. 27, 2001

Dunbar, N. W., W. C. McIntosh, and D. Love, 2001, Dating basalts using the 40Ar/39Ar method: Improvements based on electron microprobe evaluation of samples: EOS, Transactions of the American Geophysical Union, v. 82, p. F1321.

Dunbar, N., and V. McLemore, 2001, Origin of rhyolitic spherulites (thundereggs) at Red Rock State Park, New Mexico: New Mexico Geology, v. 23, p. 22.

Dunbar, N., and V. McLemore, 2001, Formation of spherulites as Rockhound State Park- The result of high temperature crystallization from rhyolitic lava: New Mexico Geology, v. 23, p. 55.

Dunbar, N., and V. McLemore, 2000, Preliminary mineralogy of the Victorio District, New Mexico: New Mexico Geology, v. 22, p. 12.

Dunbar, N., J. Winick, and W. McIntosh, 2001, What do trace element and argon systematics of melt inclusions tell us about magma generation, crystallization processes, and time scales in silicic magma chambers: Penrose Conference on Longevity and Dynamics of Rhyolitic Magma Systems. June 2001, Mammoth, CA

Love, D., S. Connell, R. Chamberlin, S. Cather, W. McIntosh, N. Dunbar, G. Smith, and S. Lucas, 2001, Constraints on the age of extensive fluvial facies of the Upper Santa Fe Group, Albuquerque and Socorro Basins, Central New Mexico: Geological Society of America Abstracts with Program, v. 2001 GSA Rocky Mountain Section and South-Central Section Meeting.

Love, D., N. Dunbar, W. McIntosh, C. McKee, S. Connell, and P. Jackson-Paul, 2001, Late miocene to early pleistocene geologic history of Isleta and Hubbell Spring Quadrangles based on 40Ar/39Ar ages and geochemical correlations of volcanic rocks: New Mexico Geology, v. 23, p. 58.

Munroe, E. A., McLemore, V., and Dunbar, N., 2000, Mine waste rock pile geochemistry and mineralogy in southwestern New Mexico: 5th Annual Conference on Acid Rock Drainage- Abstract Volume, p. 23.

Phillips, F., McIntosh, W., and Dunbar, N., 2000, Extensional collapse of the Owens Valley during the late Pliocene: Geological Society of America Abstracts with Program, v. 32, no. 7, p. A507.

Read, A., N. Dunbar, and M. Jercinovic, 2001, Monazite ages determined by electron microprobe analysis of schist from the Rincon range, southern Sangre de Cristo mountains, New Mexico: New Mexico Geology, v. 23, p. 52.

Voisins, D., A. Kurbatov, N. Dunbar, and G. Zielinski, 2001, Volcanic record in the Siple Dome Ice Cores: Siple Dome, Antarctica Science Meeting.

Wardell, L. J., Kyle, P.R., Dunbar, N., Christiansen, B., 2000, White Island volcano, New Zealand: Carbon dioxide and sulfur dioxide flux measurements and melt inclusion studies.: IAVCEI General Assembly, Bali, July 2000. Abstract Volume, p. 190.

Winick, J., Dunbar, N., and McIntosh, W., 2000, Melt inclusion hosted excess argon (40ArE) in the quartz crystals of the Bishop and Bandelier magma systems: New Mexico Geology, 22, 38.

Winick, J., McIntosh, W., and Dunbar, N., 2000, The implications of melt inclusion hosted excess argon (40ArE) to the study of silicic magma systems and the 40Ar/39Ar dating method: EOS, Transactions of the American Geophysical Union, v. 81, no. 48, p. F1387.

Zielinski, G., N. Dunbar, A. Kurbatov, and D. Voisins, 2001, Holocene volcanic records in the Siple Dome Ice Core: EOS, Transactions of the American Geophysical Union, v. 82, p. F1408.

 

Reports and Miscellaneous Publications

Seminars (speaking engagements)

-Three presentations at the "Expanding Your Horizons" workshop held in Albuquerque, NM. This program is designed for introducing junior high school and high school girls to science fields. March 11, 2000.

-Volcanoes and Glaciers in Antarctica: Implications for Climate Change. Talk for New Mexico Science Teacher's Association. April 15, 2000.

-"Microscopic Examination of Rockhound Spherulites". Presentation for "Scientists' weekend at Rockhound State Park" May 5, 2000.

-Presented microprobe talk and lab visit for "Geochemistry of Soils" workshop. August 8, 9 and 10, 2000.

-Presented seminar on "Englacial tephrochronology and implications for history of the West Antarctica Ice Sheet" at Arizona State University, September 27, 2000.

-Presented annual meeting address for the "Women in Mining" association. Denver, CO. Oct. 25, 2000.

-Talk about Mt. Erebus to school group. Jan. 23, 2001.

-Antarctic talk for Rotary Club. March 28, 2001

-Mt. Erebus eruption talk and video for Science Fair students and parents. April 7, 2001

-Partipicated in, and presented information for the Spring 2001 Geological Society of America field trip titled "Stratigraphic and Tectonic Evolution of the Albquerque Basin, Central Rio Grande Rift" (April 27-29, 2001) lead by Sean Connell and Dave Love.

-Talk at Woods Hole Oceanographic Institute on "Englacial tephrochronology and implications for history of the West Antarctica Ice Sheet", September 11, 2001.

-Partipicated in, and presented information for the Fall 2001 Friends of the Pleistocene field conference titled "Plio-pleistocene Stratigraphy and Geomorphology of the Central Part of the Albquerque Basin " (Oct. 12-14, 2001) lead by Sean Connell and Dave Love.

-Talk at University of New Mexico on "Englacial tephrochronology and implications for history of the West Antarctica Ice Sheet" at Arizona State University, Nov. 2, 2001.

Research Contracts and Grants Awarded

A 700-year Tephrochronology of the Law Dome ice core, East Antarctica. Colloborative proposal with University of Maine tentatively funded by Office of Polar Programs.

 

Service on Graduate Student Committees

Committee member for Melanie Hartman (MS). Eruptive Geochemistry of Sheveluch Volcano, Kamchatka.

Committee member for Bonnie Frey (MS) Geologic and geochemical analysis of the basalts of the Iron King Formation, a possible accreted oceanic plateau in west central Arizona.

Committee member of Jean Wardel (PhD). Degassing systematics of Mt. Erebus, Antarctica.

Committee member for Vladamir Isopolatov (PhD). Geology of Soltyn Sary District, Kurgistan, Russia.

Committee member for Daniel Voisins (MS, University of New Hampshire). Volcanic record in the Siple Dome Core, West Antarctica

Co-advisor for Jeff Winick (MS). Ar chronology and geochemical analysis of the Bandelier Tuffs.

Committee member for Chris Harpel (MS). Englacial tephrochronology in Antarctica

Committee member for Patricia Frisch (MS). Study of As in waters in Socorro and Sierra Counties.

Committee member for Jesse Crain (MS). Radioactive isotope emissions from Mt. Erebus, Antarctica.

Committee member for Richard Law (MS). Correlation spectrometer measurements of gas emissions for the Karymsky volcano, Kamchatka.

Committee member for Shelley Rourke (M.S.). Kamchatka tephrochronology

Committee member for Stephanie Bell (MS) Major and trace element geochemistry from the Rio Negro-Juruena Orogen, Western Amazonia

Committee member for Wayne Sherwood (MST). Comparison of Science Fair and Science Olympiad.

Committee member for Sarah Weaver (MST).

Courses Taught

Geochem 589. Spring, 2000. "Theory and Practice of Electron Microprobe Analysis" class. 4 students during the spring semester.

Geochem 589. Fall, 2000. "Theory and Practice of Electron Microprobe Analysis" class. 8 students during the fall semester.

Geochem 575. Fall, 2001. "Theory and Practice of Electron Microprobe Analysis" class. 9 students during the fall semester.

 

Service in Professional Societies

Member of American Geophysical Union
Member of Microbeam Analysis Society
Member of the Women in Mining Society
Member of New Mexico Microbeam Users Group

Service on Commissions/Councils/Boards

Member of the Editorial Board for the Antarctic Research Series
Member of the McMurdo Station Area Users' Committee.

Bureau Service Projects Active This Period

-Co-organizer of the Spring New Mexico Geological Society Meeting (April 7, 2000)
-Construction and maintenance of Carrizozo Malpais website http://geoinfo.nmt.edu/staff/dunbar/carrizozo/carrizozo.html
-Oversight and preparation of the AVirtual Field Trip to the Zuni-Bandera Malpais@. http://geoinfo.nmt.edu/education/rockin2000/introduction.html
-Bureau Equipment Committee member
-Committee member for purchase of Inductively Coupled Mass Spectrometer (ICP-MS)..
-Member of the Geological Editorial Board for Lite Geology
-Member of the Bureau Strategic Planning Group
-Attended ARCVIEW workshop
-Attended NSF "Fastlane" workshop to learn about proposal preparation. May 15, 2000
-Produced poster for Mining Association Meeting
-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

*Tephrochronology, chemical fingerprinting, and correlation of tephra layers in ancestral Rio Grande sediments.

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

*Characterization of the mineralogy of the Victorio Mountain skarn

*Exposure-age dating of young basalts in New Mexico.

*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.

*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.

Public Service/Education and Other Accomplishments

-Participated in, and presented at a field trip for Isleta Pueblo sixth grade students April 13, 2000

-Rockin' around New Mexico workshop- July 6, 7, 8, 2000. Lead day on Zuni-Bandera Malpais and oversaw preparation of the "Virtual field trip" on the Zuni-Bandera Malpais (http://geoinfo.nmt.edu/education/rockin2000/introduction.html)

-Lead Los Alamos Geological Society field trip to Peralta Canyon, August 12, 2000.

-Participated in the "Scientist's Weekend at Rockhound State Park". May 5, 6, and 7, 2000.

-Organized electron microprobe workshop on monazite dating. Nov. 1, 2, 3, and 4, 2000.

-Judged Science Olympiad, Feb. 24, 2001.

-Attended Kasha-Katuwe Tent Rocks National Monument planning meeting. Feb 26, 2001

-Tour of microprobe lab for incoming hydrology graduate students. March 2, 2001

-Judge for State Science Fair. April 7, 2001

-Member of and presenter for "A Field Trip for Decision Makers" group (May 9-10, 2001)

-Rockin' around New Mexico workshop- June 25, 26, 27, 2001.

-Field trip for 8th graders to Bandera Crater. Oct. 16, 2001.

-Assisted Park Service in preparation of displays for the new "Rockhound" State Park visitor center.

-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 and visiting 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

-Member of E&ES website planning committee

-Provided letters of support and information for non-Bureau proposals, particularly relative to electron microprobe laboratory.

Papers and Proposals Reviewed

Not listed on website. See Loretta for full activity report