Director, WiscSIMS Laboratory
Office: 145 Weeks Hall
The University of Wisconsin SIMS lab (WiscSIMS) was installed in 2005 and became a National Facility for Stable Isotope Geochemistry in 2008 with support from NSF, Division of Earth Sciences, Instrumentation and Facilities Program. The WiscSIMS lab houses a CAMECA IMS-1280. The IMS-1280 is a large radius multi-collector ion microprobe incorporating many improvements over earlier instruments, several of which are designed to enhance precision and accuracy of isotope ratio analysis.
Primitive meteorites recorded the early evolution of the solar system. We use SIMS to obtain high precision isotope analyses of pristine meteorite samples, such as Ca, Al-rich inclusions and chondrules in order to address the timing of their formation and the condition of proto-planetary disk in which they formed. We are also interested in precious particles collected from asteroids and comets by space missions, such as NASA Stardust Mission.
Kita NT, Sobol PE, Kern JR, Lord NE and Valley JW (2015). UV light microscope: Improvements in optical imaging for a secondary ion mass spectrometer. J. Anal. At. Spectrom. 30, 1207-1213. doi:10.1039/C4JA00349G
Lunning NG, McSween HY, Tenner TJ, Kita NT and Bodnar RJ (2015). Olivine and pyroxene from the mantle of asteroid 4 Vesta. Earth Planet. Sci. Lett. 418, 126-135. doi:10.1016/j.epsl.2015.02.043
Nakashima D, Ushikubo T, Kita NT, Weisberg MK, Zolensky ME and Ebel DS(2015). Late formation of a comet Wild 2 crystalline silicate particle, Pyxie, inferred from Al–Mg chronology of plagioclase. Earth Planet. Sci. Lett. 410, 54-61. doi:10.1016/j.epsl.2014.11.020
Tenner TJ, Nakashima D, Ushikubo T, Kita NT, Weisberg MK (2015). Oxygen isotope ratios of FeO-poor chondrules in CR3 chondrites: Influence of dust enrichment and H2O during chondrule formation. Geochim. Cosmochim. Acta 148, 228-250. doi:10.1016/j.gca.2014.09.025
46th Lunar and Planetary Science Conference (March 16-20, 2015): See abstracts.
Former WiscSIMS Cosmochemists