Astrogeology Science Center

I am interested in the integration of remote sensing and sample analysis data for investigating the origin and evolution of the terrestrial planets, with special emphasis on lunar geochemistry. I am the curator of the USGS Meteor Crater Sample Collection. I am the Chair of NASA's RPIF Network, and I am the director of the USGS Regional Planetary Information Facility.

Education

  • Ph.D., Earth and Planetary Sciences, The University of New Mexico, Albuquerque, 2004
  • M.S., Earth and Planetary Sciences, The University of New Mexico, Albuquerque, 2001
  • B.S., Earth and Planetary Sciences, with Honors, The University of New Mexico, Albuquerque, 1998

Research

USGS, Astrogeology Science Center, Flagstaff, AZ

Assistant Science Center Director, October 2015 to Present

  • Work with the Science Center Director to advance the goals of the agency and the science center by participating in, and leading, interdisciplinary groups tasked with long-term planning, resource sharing, and engagement of the scientific community.
  • Facilitating cross-discipline interaction of different functional groups within the USGS Astrogeology to meet USGS and NASA science goals and objectives.

Assistant Program Coordinator, USGS National Geological and Geophysical Data Preservation Program (NGGDPP) - October 2013 - September 2016

  • Member of the USGS NGGDPP leadership team responsible for preserving and providing access to USGS scientific collections. Presented long-term plans to a Federal Advisory Committee for this Congressionally authorized program.
  • Organize and run the grants funding program for the NGGDPP, which is designed to provide critical support to State Geological Surveys for preserving and providing access to their historical geologic materials and scientific collections.
  • Assisted in organizing and leading the USGS Geologic Materials Working Group to develop a set of policies for management of USGS scientific collections. 
  • Led a working group of interdisciplinary representatives from Federal agencies, academia, and state bureaus to develop a five-year plan for maintaining and improving upon the success of the USGS NGGDPP.
  • Curator of USGS Meteor Crater and Flynn Creek Crater Sample Collections.

Research Geologist, April 2007 to Present

  • P.I., NASA Planetary Science Division (2016), “NASA-USGS PSDI IAA Community Engagement,”
  • P.I., NASA Planetary Science Division (2015), “USGS Astrogeology Science Center Proposal for Engagement of the Planetary Cartography Community,”
  • P.I., NASA Planetary Geology and Geophysics Program (2014), “Combining Sample Analysis and Numerical Modeling to Reconstruct the Origin and Evolution of Flynn Creek Crater, Tennessee,”
  • P.I., NASA Planetary Geology and Geophysics Program (2013), “Placing New Constraints on the Formation of Meteor Crater through Characterization and Analysis of Samples from the Ejecta Blanket,”
  • Co-I, NASA Lunar Advanced Science and Exploration Research Program (2013), “Hidden Landscapes: Lunar Regolith Properties and Subsurface Geology From Radar Studies,” PI Bruce Campbell, Smithsonian
  • P.I., NASA Planetary Geology and Geophysics Program (2012), “Understanding the formation and evolution of mixed origin terrains in the Copernicus lunar quadrangle,”
  • P.I., NASA Planetary Geology and Geophysics Program (2012), “USGS Cartography Proposal Regional Planetary Image Facility, subtask E2".
  • Co-I, Lunar Advanced Science and Exploration Research Program (2011), “Analysis and chronostratigraphic implications of secondary-to-source impact feature relationships,” PI Jim Skinner.
  • Collaborator, NASA Dawn at Vesta Participating Scientist Program (2010), “Spectral unit and thermal inertia mapping of asteroid 4 Vesta in support of science and operations,” PI Dr. Tim Titus.
  • P.I., NASA Planetary Mission Data Analysis Program (2009), “Forward Modeling of Lunar Prospector Gamma Ray Spectrometer Thorium Data: Implications for the Abundance and Distribution of Thorium on the Moon”
  • P.I., NASA Lunar Advanced Science and Exploration Research Program (2009), “Using Gamma-ray, Neutron, and Spectral Reflectance Data to Obtain Accurate Measures of Global Lunar Iron Abundances
  • P.I., NASA Planetary Geology and Geophysics Program (2009), “Multi-dimensional characterization of the impact ejecta deposit from Meteor Crater, AZ: Implications for impact cratering processes on terrestrial planets”
  • P.I., NASA Planetary Geology and Geophysics Program (2008), “USGS Cartography Proposal Regional Planetary Image Facility, subtask E2”
  • P.I., NASA Planetary Geology and Geophysics Program (2008), “USGS Cartography Proposal, E.M. Shoemaker Fellowship subtask E1”
  • P.I., NASA Early Career Fellowship (2008), “Start up funds”
  • Collaborator, NASA Planetary Geology and Geophysics Program (2007), “Remote sensing and geologic studies of planetary crusts,” PI Dr. B. Ray Hawke.
  • P.I., NASA Discovery Data Analysis Program (2005), “Investigating Thorium Enhancements and Pyroclastic Deposits on the Moon: Implications for the Abundance and Distribution of Thorium in the Lunar Crust and Mantle”

Los Alamos National Laboratory,  Los Alamos, NM

Postdoctoral Research Associate (David Lawrence, advisor), 2004 - 2007

  • Used data from the Lunar Prospector (LP) mission to investigate the geochemistry of the Moon.
  • Employed forward-modeling techniques to revisit the LP - Gamma Ray Spectrometer (GRS) thorium dataset.
  • Used interactive data language (IDL) to analyze, interpret, and present data from the LP and Clementine missions.
  • Collected and interpreted data on lunar regolith compositions for studies that involve simulations of thermal and epithermal neutrons in lunar soils.
  • Collaborated with members of the LP team in an effort to use data from the LP . Neutron Spectrometer (NS) to investigate hydrogen deposits at the lunar poles.
  • Conducted ion microprobe research on room temperature semiconductor materials, including CdZnTe, for gamma ray spectroscopy.
  • Participated in a study that used data from the Mars Odyssey Neutron Spectrometer (MONS) to investigate the hydrogen content and ground-ice stability of the martian regolith.

The University of New Mexico, Albuquerque

Graduate research assistant and lab technician in the secondary ion mass spectrometer (SIMS) laboratory (Charles Shearer, advisor), 2001 - 2004

  • Dissertation: Deciphering trace element behavior during basaltic magmatism on the Moon through analyses of lunar pyroclastic glasses, ancient lunar basalts, and terrestrial analogues
  • Use major, minor, and trace element data in rocks and minerals to investigate the formation and evolution of terrestrial planets.
  • Operated the Cameca 4f secondary ion mass spectrometer (SIMS).Prepared, documented, and analyzed synthetic and geologic samples, including martian and lunar samples as well as various meteorites.
  • Used a scanning electron microscope (JEOL 5800), electron microprobes (JEOL 8200 and JEOL 733), and a Scintag PadV goniometer/diffractometer to document and characterize geologic materials.
  • Used optical microscopes and digital cameras to document sample features and construct analytical maps of natural and synthetic geologic samples.

Graduate research assistant and educational outreach assistant (Horton Newsom, advisor), 1998 - 2001

  • Thesis: Hydrothermal activity at the Lonar Lake Impact Structure: Implications for impact cratering on Mars
  • Conducted background research, data entry, sample preparation, statistical analysis, and geochemical modeling associated with impact-induced hydrothermal activity on Earth and Mars.
  • Used a scanning electron microscope (JEOL 5800), electron microprobes (JEOL 8200 and JEOL 733), and a Scintag PadV goniometer/diffractometer to document and characterize geologic materials.
  • Implemented aqueous geochemical modeling programs (i.e., PHREEQCI and EQ36) to model hydrothermal alteration reactions.
  • Created and implemented inquiry-based activities for students (grades 6-12) as part of UNM.s educational outreach program.
  • Analyzed student participation and perception through the use of questionnaires.
  • Served as a graduate mentor for the NASA PURSUE program

Honors and Service

  • NASA Planetary Science Advisory Committee, 2018
  • Review Panelist, NASA Research Programs, 2007- Present
  • Co-Chair, Northern Arizona Planetary Science Alliance, 2014 - Present
  • NAU School of Earth Science and Environmental Sustainability PhD Advisory Committee
  • USGS Lead for NASA Mapping and Planetary Infrastructure Team (MAPSIT)
  • Presidential Early Career Award for Scientists and Engineers, 2012
  • Lunar and Planetary Science Conference Organizing Committee, 2015 - Present
  • Adjunct Professor, School of Earth Science and Environmental Sustainability, Northern Arizona University
  • NASA Group Achievement Award for 2010 Desert RATS Science
  • USGS Performance Award, 2010, 2011
  • USGS STAR Award, 2008, 2009 (2 awards), 2010 (2 awards), 2011 (2 awards)
  • Sagan-Haskin Early Career Fellowship, 2006 - 2009
  • New Mexico Space Grant Fellowship, 1999 - 2001 and 2003 - 2004
  • Sigma Xi Superior Undergraduate Student Award, 1998
  • UNM, Earth and Planetary Sciences Outstanding Senior Award, 1998
  • UNM, Earth and Planetary Sciences Outstanding Junior Award, 1997
  • University of New Mexico Scholars Scholarship, 1993 - 1997

Memberships

  • American Geophysical Union
  • Geological Society of America
  • Geochemical Society

Bibliography

Professional Publications

  • Hagerty, J. J., Buczkowski, B., Evans, C., Faulds, J., Hutchison, V., Mansur, A., Metesh, J., Noren, A., Ortt, R., Rose, K., and Yellich, J., (2016) The USGS National Geological and Geophysical Data Preservation Program (NGGDPP): A Five Year Plan (2016-2021) for Continued Success, U.S. Geological Survey Circular, 41 p. 
  • Hagerty, J. J., Lawrence, D. J., and Hawke, B. R. (2011) Thorium abundances of basalt ponds in South Pole-Aitken basin: Insights into the composition and evolution of the far side lunar mantle, J. Geophys. Res., 116, E06001, doi:10.1029/2010JE003723
  • Hagerty, J. J., Lawrence, D. J., Hawke, B. R., and Gaddis, L. R. (2009) Thorium abundances on the Aristarchus plateau: Insights into the composition of the Aristarchus pyroclastic glass deposits, J. Geophys. Res., 114, E04002, doi:10.1029/2008JE003262
  • Hagerty, J. J., Shearer, C. K., and Vaniman, D. T. (2006) Heat-producing elements in the lunar mantle: Constraints from ion microprobe analyses of lunar volcanic glasses. Geochimica et Cosmochimica Acta, 70(13), 3457-3476, doi:10.1016/j.gca.2006.04.013.
  • Hagerty, J. J., Lawrence, D. J., Hawke, B. R., Vaniman, D. T., Elphic, R. C., and Feldman, W. C. (2006) Refined thorium abundances for lunar red spots: Implications for evolved, non-mare volcanism on the Moon. Journal of Geophysical Research-Planets, 111, E06002, doi:10.1029/2005JE002592.
  • Hagerty, J. J., Shearer, C. K., Vaniman, D. T., and Burger, P. V. (2006) Identifying the effects of petrologic processes in a closed basaltic system using trace element concentrations in olivines and glasses: Implications for comparative planetology. American Mineralogist, 91, 1499-1508.
  • Hagerty, J. J., Shearer, C. K., and Papike, J. J. (2005) Petrogenesis of the Apollo 14 high-Al basalts: Implications from ion microprobe analyses. Geochimica et Cosmochimica Acta, 69(24), 5831-5845, doi:10.1016/j.gca.2005.08.008.
  • Hagerty, J. J., and Newsom, H. E. (2003) Hydrothermal alteration at the Lonar Lake impact structure: Implications for impact cratering on Mars. Meteoritics and Planetary Science, 38, 365-382.
  • Laura, J. R., Hare, T. M., Gaddis, L. R., Fergason, R. L., Skinner, J. A., Hagerty, J. J., and Archinal, B. A., (2017) Towards a Planetary Spatial Data Infrastructure, International Journal of Geo-Information, 6, 181, doi:10.3390/ijgi60181
  • Keszthelyi, L., Hagerty, J. J., Bowers, A., Ellefsen, K., Ridley, I., King, T., Trilling, D., Moskovitz, N., and Grundy, W., (2017) Feasibility study for the quantitative assessment of mineral resources in asteroids, USGS Open File Report, 2017-1041.
  • Adrian, D. R., King, D. T., Jaret, S. J., Ormo, J., Petruny, L. W., Hagerty, J. J., and Gaither, T. A., (2017) Sedimentological and petrographic analysis of drill core FC77-1 from the flank of the central uplift, Flynn Creek Impact Structure, Tennessee, Meteortics and Planetary Science, 1-17, doi:10.1111/maps.12862
  • Gullikson, A. L., Hagerty, J. J., Reid, M. R., Rapp, J. F., and Draper, D. S., (2016) Silicic lunar volcanism: Testing the crustal melting model, American Mineralogist, 101, 2312-2321, DOI: http://dx.doi.org/10.2138/am-2016-5619
  • Cavosie, A. J., Timms, N. E., Erickson, T. M., Hagerty, J. J., and Horz, F., (2016) Transformations to granular zircon revealed: Twinning, reidite, and ZrO2 in shocked zircon from Meteor Crater (Arizona, USA), Geology, v44, no. 9, 703-706, DOI: 10.1130/G38043.1.
  • Adrian, B. M., Buczkowski, B. J., Bybell, L. M., Childs, J. R., Coleman, J. L., Coombs, M. L., Hagerty, J. J., Moore, D. E., Schneider, J. L., Slate, J. L., Smith, S. M., and Wardlaw, B. R., (2015) The USGS Geologic Collections Management System (GCMS): A Master Catalog and Collections Management Plan for USGS Geologic Samples and Sample Collections, USGS Circular, U.S. Geological Survey Circular 1410, 108 p. http://dx.doi.org/10.3133/cir1410
  • Cahill, J. T. S., Hagerty, J. J., Lawrence, D. J., Klima, R. L., and Blewett, D. T., (2014) Surveying the South Pole-Aitken basin magnetic anomaly for remnant impactor metallic iron, Icarus, 243, 27-30.
  • Klima, R., Cahill, J., Hagerty, J., and Lawrence D. (2013) Magmatic water detected in Bullialdus crater on the Moon, Nature Geoscience, 6, 737-741.
  • Newsom, H. E., Wright, S. P., Misra, S., and Hagerty, J. J. (2012) Chapter 21: Barringer Meteorite Crater and Lonar Crater - paradigms for simple impact crater formation, in Impact Cratering: Processes and Products edited by G.R. Osinski and E. Pierazzo, Blackwell: London, in press
  • Glotch, T. D., Hagerty, J. J., Lucey, P. G., Hawke, B. R., Giguere, T. A., Arnold, J. A., Williams, J., Jolliff, B. L., and Paige D. A. (2011) The Mairan domes: Silicic volcanic constructs on the Moon, Geophys. Res. Lett., 38, L21204, doi:10.1029/2011GL049548
  • Vaughan, R. G., Titus, T. N., Johnson, J. R., Hagerty, J. J., Gaddis, L. R., Soderblom, L. A., and Geissler, P., (2011) Hyperspectral analysis of rocky surfaces on the Earth and other planetary bodies, Chapter 27 in Hyperspectral Remote Sensing of Vegetation, edited by Drs. P. S. Thenkabail, J. G. Lyon, and A. Huete, Taylor & Francis, pages 634-656.
  • Adrian, B. M., Buczkowski, B. J., Bybell, L. M., Childs, J. R., Coleman, J. L., Coombs, M. L., Hagerty, J. J., Moore, D. E., Ramotnik, C. A., Schneider, J. L., Slate, J. L., Smith, S. M., and Wardlaw, B. R., (2010) The USGS Geologic Collections Management System (GCMS): A Master Catalog and Collections Management Plan for USGS Geologic Samples and Sample Collections, USGS Report, pp. 99.
  • Lawrence, S.J., Hawke, B.R., Gillis-Davis, J.J., Taylor, G.J., Lawrence, D.J., Cahill, J.T., Hagerty, J.J., Lucey, P.G., Smith, G.A., and Keil, K. (2008) Composition and origin of the Dewar geochemical anomaly. Journal of Geophysical Research – Planets, 113, E02001, doi: 10.1029/2007/JE002904
  • Feldman, W.C., Mellon, M.T., Gasnault, O., Diez, B., Elphic, R.C., Hagerty, J. J., Lawrence, D.J., Maurice, S., and Prettyman, T.H. (2007) Vertical distribution of hydrogen at high northern latitudes on Mars: The Mars Odyssey Neutron Spectrometer. Geophysical Research Letters, 34(5), L05201 doi:10.1029/2006GL028936.
  • Lawrence, D.J., Puetter, R.C., Elphic, R.C., Feldman, W.C., Hagerty, J. J., Prettyman, T.H., and Spudis, P.D. (2007) Global spatial deconvolution of Lunar Prospector Th abundances. Geophysical Research Letters, 34(5), L05201 doi:10.1029/2006GL028530.
  • Prettyman, T. H., Hagerty, J. J., Feldman, W. C., Lawrence, D. J., Vaniman, D. T., and McKinney, G. W. (2006) Elemental composition of the lunar surface: Analysis of gamma ray spectroscopy data from Lunar Prospector. Journal of Geophysical Research-Planets, 111, E12007, doi:10.1029/2005JE002656.
  • Lawrence, D. J., Feldman, W. C., Elphic, R. C., Hagerty, J. J., Maurice, S., McKinney, G. W., and Prettyman, T. H. (2006) Improved modeling of counting rates from the Lunar Prospector neutron spectrometer. Journal of Geophysical Research . Planets, 111, E08001, doi:10.1029/2005JE002637.
  • McKinney, G. W., Lawrence, D. J., Prettyman, T. H., Elphic, R. C., Feldman, W. C., and Hagerty, J. J. (2006) MCNPX benchmark for cosmic ray interactions with the Moon, Journal of Geophysical Research-Planets, 111, doi:10.1029/2005JE002551.
  • Lawrence, D. J., Hawke, B. R., Hagerty, J. J., Elphic, R. C., Feldman, W. C., Prettyman, T. H., and Vaniman, D. T. (2005) Evidence for a high-Th, evolved lithology on the Moon at Hansteen Alpha. Geophysical Research Letters, 32, L07201.
  • Grew, E. S., Yates, M. G., Shearer, C. K., Hagerty, J. J., Sheraton, J. W., and Sandiford, M. (2005) Beryllium in psammo-pelitic granulites and anatectic pegmatites of the ultrahigh-temperature Napier complex, Enderby Land, East Antarctica: The role of sapphirine. Journal of Petrology, 47(5), 859-882.
  • Newsom, H. E., Hagerty, J. J., and Thorsos, I. (2001) Location and sampling of aqueous and hydrothermal deposits in Martian impact craters, Astrobiology, 1, 71-89.
  • Sorge, C., Newsom, H. E., and Hagerty, J. J. (2000) Fun is not enough: Attitudes of Hispanic middle school students towards science and scientists, Hispanic Journal of Behavioral Sciences, 22, 332-345.
  • Newsom, H. E., Hagerty, J. J., and Goff, F. (1999) Hydrothermal fluids and the origin of the Martian soil, Journal of Geophysical Research-Planets, 104, 8717-8728.
  • Newsom, H. E., and Hagerty, J. J. (1997) Chemical components of the Martian soil: Melt degassing, hydrothermal alteration, and chondritic debris, Journal of Geophysical Research-Planets, 102, 19,345-19,355.

Oral Presentations

  • “Planetary Spatial Data Infrastructure (PSDI): Why We Need It” June, 2017 3rd Planetary Data Workshop 
  • “Flynn Creek Impact Crater: Petrographic and SEM Analyses of Drill Cores from the Central Uplift” March 2017, Lunar and Planetary Science Conference
  • “The NASA Regional Planetary Image Facility (RPIF) Network: A globally distributed resource for the planetary science community” March 2016, 47th Lunar and Planetary Science Conference 
  • “Combining sample analysis and numerical modeling to reconstruct the origin and evolution of Flynn Creek crater, Tennessee: Year 1 Status Report” July 2015, 6th Planetary Crater Consortium Meeting.
  • “Compositional and morphologic mapping of the Copernicus quadrangle, the Moon: Year 3 Status” June 2015, Planetary Geologic Mappers Meeting.
  • “Compositional and morphologic mapping of the Copernicus quadrangle, the Moon: New constraints on regional lithologic complexity” March 2015, 46th LPSC
  • “The dark side of the Moon: Why does the Moon look the way it does?” May 2014, Science on Tap, Flagstaff public lecture series
  • “Geologic mapping of the Copernicus lunar quadrangle: Determining the source of the geochemical anomaly at Timocharis crater, November, 2013, GSA Annual Meeting.
  • “Integrating lunar sample and remote sensing data to understand the asymmetry of the Moon,” October, 2013, Museum of Northern Arizona Science Cafe
  • “Current models of lunar formation,” May, 2013, Lowell Observatory Colloquia
  • "Combining compositional and morphologic data to map the Copernicus lunar quadrangle: A case study for new methods in lunar geologic mapping,” November, 2012, GSA Annual Meeting
  • “Integrating lunar sample and remote sensing data to understand the asymmetry of the Moon,” October 2012, Lowell Observatory Colloquia
  • “Integrating lunar sample and remote sensing data to understand the asymmetry of the Moon,” October 2012, USGS 2012 Awards Ceremony
  • “The NASA Regional Planetary Image Facility Network,” Planetary Data Workshop, Northern Arizona University, June, 2012
  • “The NASA Regional Planetary Image Facility Network,” Planetary Geologic Mappers Meeting, USGS Flagstaff Science Center, June, 2012.
  • “The USGS Meteor Crater Sample Collection,” Northern Arizona University, School of Earth Science and Environmental Sustainability, November, 2011
  • "Combining sample and remote sensing data: An integrated approach to lunar science,” Northern Arizona University, School of Earth Science and Environmental Sustainability, April, 2011
  • Thorium abundances of basalt ponds in South Pole-Aitken basin: Insights into the composition and evolution of the far side lunar mantle,” 42nd Lunar and Planetary Science Conference, The Woodlands, TX, March 2011
  • "Addressing lunar science questions through data integration,” NASA Johnson Space Center Astromaterials Research and Exploration Science Directorate, February, 2011
  • "Combining sample and remote sensing data: An integrated approach to lunar science,” NASA Johnson Space Center, Astromaterials Research and Exploration Science Directorate, July, 2009
  • "Integrating lunar sample data with Lunar Prospector thorium data: Insights into the thermal and magmatic evolution of the Moon,” 19th V.M. Goldschmidt Conference, Davos, Switzerland, June, 2009
  • "New estimates of thorium abundances for the Rima Bode pyroclastic glass deposit,” 40th Lunar and Planetary Science Conference, The Woodlands, Texas, March, 2009
  • “Thorium abundances on the Aristarchus Plateau: Insights into the composition of the Aristarchus pyroclastic glass deposits,” 39th Lunar and Planetary Science Conference, League City, TX, March, 2008
  • “Dust monitoring on the MER rovers,” MER team meeting, Washington D.C., February, 2008
  • "Hydrothermal alteration at the Lonar Lake impact structure: Implications for impact cratering on Mars," Invited talk at Southwest Research Institute, Boulder, Colorado, January, 2007.
  • "Forward modeling of thorium data from the Lunar Prospector gamma ray spectrometer: Insights into the lunar crust and mantle," Invited talk at U.S.G.S Astrogeology Research Program, Flagstaff, Arizona, November, 2006.
  • "Forward modeling of thorium data from the Lunar Prospector gamma ray spectrometer," Invited talk at Southwest Research Institute, Boulder, Colorado, November, 2006.
  • "Heat producing elements in the lunar mantle: Insights from ion microprobe analyses of lunar pyroclastic glasses," Invited colloquium at the University of Colorado, Boulder, Colorado, November, 2006.
  • "Understanding planetary processes through a global study of the Moon.s surface composition," 2006 Los Alamos National Laboratory Postdoctoral Symposium, Los Alamos, NM, August, 2006.
  • "Hydrogen abundances at the lunar poles as measured with Lunar Prospector Neutron Spectrometer data," American Association of Petroleum Geologists 2006 Annual Meeting, Houston, TX, April, 2006.
  • "Estimating thorium abundances of basalt ponds in South Pole-Aitken Basin: Implications for the composition of the farside lunar mantle," 37th Lunar and Planetary Science Conference, Houston, TX, March, 2006.
  • "Thorium abundances at lunar red spots: Implications for geochemically evolved, non-mare volcanism on the Moon," 68th Annual Meeting of the Meteoritical Society, Gatlinburg, TN, September, 2005.
  • "Reasons for investigating the bulk composition of the Moon," Invited talk at Rutherford Appleton Laboratory, Didcot, United Kingdom, May, 2005.
  • "Forward modeling of thorium abundances at lunar red spots," Invited talk at University College, London, United Kingdom, May, 2005.
  • "Trace element behavior in ancient lunar basalts and volcanic glasses: Implications for the bulk composition of the Moon," Invited talk at Los Alamos National Laboratory (ISR-1 seminar), August, 2004.
  • "Thorium and samarium in the lunar mantle: Insights into the composition of the lunar mantle and basaltic magmatism on the Moon," 35th Lunar and Planetary Science Conference, Houston, TX, March, 2004.
  • "Trace element characteristics of minerals in the Apollo 14 high-Al basalts: Implications for an igneous versus an impact origin," 34th Lunar and Planetary Science Conference, Houston, TX, March, 2003.
  • "New evidence for hydrothermal alteration at the Lonar Lake Impact Structure: Implications for impact cratering on Mars," 32nd Lunar and Planetary Science Conference, Houston, TX, March, 2001.