CHEM 0226

chilton [at] umd [dot] edu

Isotope Geochemistry Laboratory

Richard Walker

My primary research interests involve using siderophile elements, the Hf-W isotope system, and the Re-Os isotope system to study early solar system materials and planetary evolution.

Cook D.L., Smith T., Leya I., Hilton C.D., Walker R.J. (2018) Excess ¹⁸⁰W in IIAB iron meteorites: Identification of cosmogenic, radiogenic, and nucleosynthetic components. Earth and Planetary Science Letters. 503 29-36. DOI: 10.1016/j.epsl.2018.09.021

Hilton, C.D., Bermingham, K.R., Walker, R.J. and McCoy, T.J. (2019) Genetics, crystallization sequence, and age of the South Byron Trio iron meteorites: New insights to carbonaceous chondrite (CC) type parent bodies. Geochimica et Cosmochimica Acta. 251 217-228.

McCoy, T.J., Corrigan, C.M., Nagashima, K., Reynolds, V.S., Ash, R.D., McDonough, W.F., Yang, J., Goldstein, J.I., Hilton, C.D. (2019) The Milton pallasite and South Byron Trio irons: Evidence for oxidation and core crystallization. Geochimica et Cosmochimica Acta. 259 358-370. DOI: 10.1016/j.gca.2019.06.005

Hilton, C.D., Walker, R.J. (2020) New implications for the origin of the IAB main group iron meteorites and the isotopic evolution of the noncarbonaceous (NC) reservoir. Earth and Planetary Science Letters. 540 116248. DOI: 10.1016/j.epsl.2020.116248

Hilton, C.D., Ash, R.D., Piccoli, P.M., Kring, D.A., McCoy, T.J., Walker, R.J. (2020) Origin and age of metal veins in Canyon Diablo graphite nodules. Meteoritics and Planetary Science. 55 (4) 771-780. DOI: 10.1111/maps.13464