I run an X-ray Diffraction (XRD) Laboratory specializing in characterization of primitive meteorites at Kingsborough Community College (CUNY) and I'm a Research Associate at the American Museum of Natural History (AMNH). I try to infer the nature of asteroids at the point of accretion from the mineralogy of meteorites. Inside of asteroids high temperature phases formed in the solar nebula reacted with water from molten ices to form clay like minerals. My research is attempting to reveal the nature of the environments where these reactions took place and the evolution of asteroids during hydration. Mineral abundances for meteorites, determined by XRD, are also aiding astronomers to match meteorite samples to asteroids and to understand what asteroid surfaces are like today. For me, research started in impact studies and I continue to be interested in impacts and tektites. Most recently, I have been studying the fate of biomass during meteorite impacts.
Some Recent Publications (full list)
Takir, D., HOWARD, K., Yabuta, H., McAdam, M., Hibbitts, C., Emery, J. Linking Water-Rich Asteroids and Meteorites: Implications for Asteroid Space Missions. In Abreu, N. (ed) (2018) Primitive Meteorites and Asteroids: Physical, Chemical, and Spectroscopic Observations Paving the Way to Exploration, 450pp.
McAdam, M. M., Sunshine, J. M., HOWARD, K. T., Alexander, C. M., McCoy, T. J., and Bus, S. J. (2018) Spectral Evidence for Amorphous Silicates in Least-processed CO Meteorites and Their Parent Bodies, Icarus, 306: 32-49.
Alexander, C. M. O’D., Greenwood, R. C., Bowden, R., Gibson, J. M., HOWARD, K. T., Franchi, I. A. (2018) A multi-technique search for the most primitive CO chondrites. Geochimica Cosmochimica Acta, 221: 406-420.
B. De Gregorio, R. Stroud, N. Abreu, K.T. Howard (2016). Determination of the Modal Abundance ofNano-Scale Amorphous Phases Using Selected Area Electron Diffraction Mapping. Microscopy & Microanalysis 22.
A. Garenne, P. Beck, G. Montes-Hernandez, O. Brissaud, B. Schmitt, E. Quirico, L. Bonal, C. Beck, K.T. Howard (2016). Bidirectional reflectance spectroscopy of carbonaceous chondrites: Implications for water quantification and primary composition. Icarus, 264: 172-183.
Howard, K.T., Alexander, C.M.O'D, Schrader, D. and Dyl, K. A (2015). Classification of hydrous meteorites (CR, CM and C2 ungrouped) by phyllosilicate fraction: PSD-XRD modal mineralogy and planetesimal environments. Geochimica et Cosmochimica Acta 149: 206-222 doi:10.1016/j.gca.2014.10.025
McAdam, M., Sunshine, J., K.T. Howard, Kelly, M.S., McCoy, T.J. (2015). Aqueous Alteration on Asteroids: Linking the Mineralogy and Spectroscopy of CM and CI Chondrites. Icarus, doi:10.1016/j.icarus.2014.09.041
Howard, K.T. et al. (2013). Biomass preservation in impact melt ejecta. Nature Geoscience, 6: 1018-20
AlexanderC.M.O.D., Howard, K.T., Bowden R., Fogel M.L. 2013. The classification of CM and CR chondrites using bulk H, C and N abundances and isotopic compositions, Geochimica et Cosmochimica Acta 123: 244-260