CMS Researchers

 

Mini.jpgMeenakshi Wadhwa (Director, Center for Meteorite Studies and Professor, School of Earth and Space Exploration) Ph.D. Washington University (1994) - Dr. Wadhwa (left) is broadly interested in deciphering the origin and evolution of our solar system and planetary bodies in it through geochemical and isotopic means. She utilizes high precision mass spectrometric techniques to investigate a wide range of solar system materials, including meteorites of asteroidal and Martian origin, Moon rocks (from the Apollo missions and lunar meteorites), and other samples returned by spacecraft missions such as Genesis and Stardust. In studying these diverse materials, her goals are to i) decipher the processes involved in their formation using trace and minor element distributions and stable isotope systematics; and ii) determine their time scales of formation using a variety of radiogenic isotope chronometers.

Carleton Moore (Founding Director, Center for Meteorite Studies and Faculty Emeritus, Dept. of Geological Sciences and Dept. of Chemistry and Biochemistry) Ph.D. California Institute of Technology (1960) – Dr. Moore was editor of the journal Meteoritics for 20 years. He was a member of the Lunar Sample Preliminary Examination Team for the Apollo program and a principal investigator for the returned lunar sample program for all the Apollo missions. Dr. Moore’s research efforts are focused on the geochemistry of meteorites, lunar samples and analytical geochemical problems. Analytical instruments or techniques used in these investigations include atomic absorption spectrophotometry, gas chromatography, ion chromatography, neutron activation analysis, X-ray fluorescence spectrophotometry and electron microprobe techniques together with wet chemical analytical methods and standard methods for the characterization of meteoritic organic compounds. Additional research interests take advantage of the great statistical depth present in the Center for Meteorite Studies collections, including statistical studies of meteorite compositions and homogeneity, the origin of the low calcium achondrites, trace elements in iron meteorites, and high- and low-temperature phases, including organic compounds, in carbonaceous chondrites.

Laurence_Garvie.jpgLaurence A.J. Garvie (Collections Manager) Ph.D. University of Bristol (1992) - Dr. Garvie (left) deciphers early Solar System processes through the use of innovative, high-spatial-resolution electron microscopic and spectroscopic studies of meteorites. His studies primarily focus on carbonaceous chondrite meteorites, which provide a unique record of the physical and chemical processes that shaped our Solar System. His current projects are roughly divided between mineralogical studies designed to reveal the structure and formation conditions of the abundant phyllosilicates in the CI and CM chondrites, and studies of the structure, distribution and formation conditions of organics in the carbonaceous chondrites. Highlights of Dr. Garvie's research include the discovery of serpentine nanotubes, polyhedral serpentines, hollow and solid nanoglobules made of amorphous carbon, and a ubiquitous clay-organic carbon relationship in these chondritic meteorites. The latter discovery is of particular interest since understanding the relationship between organic matter and the inorganic components in primitive meteorites has the potential to reveal important new information on abiotic organic processing during Solar System formation. He also leads projects designed to understand the chemistry and mineralogy of rock surface coatings, with particular emphasis on the laminated, Mn-rich coatings of arid terrestrial environments. Dr. Garvie serves as an Associate Editor for American Mineralogist.

Amy cleanroomAmy J.G. Jurewicz (Faculty Research Associate) Ph.D. Rensselaer Polytechnic Institute (1986) - Dr. Jurewicz's (right) research currently focuses on the recovery and analysis of the GENESIS solar-wind collector materials. Solar wind is a direct analog of the early solar nebula, so from its composition we will glean insight into how our solar system formed. GENESIS is a NASA mission which collected solar-wind sample for two years, prior to a hard landing in Utah during the return to Earth. See the GENESIS website for more information. Before GENESIS, Dr. Jurewicz's research included work on a number of NASA missions, as well as the fabrication of meteorite analogs for the purpose of determining how one meteorite could be formed from another through natural, early solar system processes.

Phil photoPhilip E. Janney (Associate Research Scientist) Ph.D. University of California, San Diego (1996) - Dr. Janney (left) uses stable and radiogenic isotope systems to understand the timing and processes involved in the early history of the Solar System, from the condensation of the first solids to the differentiation of planets. Current research topics include the study of Mg and Si isotope fractionations in refractory inclusions in chondrites and laboratory-produced analogs to understand the role of evaporation in the history of these earliest-formed solids, as well as the use of the short-lived radionuclide systems 26Al-26Mg and 60Fe-60Ni to investigate the formation history of chondrites and differentiated meteorites. He is also involved in several projects focused on the radiogenic isotope geochemistry of the Earth’s mantle.  Dr. Janney manages the Isotope Cosmochemistry and Geochronology Laboratory, which features a 1000 sq. ft. class 10,000 clean laboratory and a Thermo Neptune multicollector plasma mass spectrometer.

HinesRebekah Hines (Research Professional) M.Sc. University of Saskatchewan (2001) – Rebekah’s (right) background in natural history collection management and conservation, educational outreach as well as isotope geochemistry enables her to serve a multi-disciplinary role in the CMS. While the majority of her time is spent supporting the research performed in the clean chemistry laboratory and on the Thermo Neptune mass spectrometer in the Isotope Cosmochemistry and Geochronology Laboratory and the development and improvement of laboratory techniques, she also takes an active role in CMS outreach programs as well as curation of the meteorite collection.

Greg Brennecka (Postdoctoral Research Associate) Ph.D. Ar  i z o na   BrenneckaState University (2011) – Dr. Brennecka is currently working on understanding uranium  isotope  variation in Solar System material with a primary focus on how those variations affect early Solar System chronomet ers.  A nother major interest is working to understand apparent nucleosynthetic anomalies in CAIs (calcium- and aluminum-rich inclusions) for a variety of elements like Ba, Nd, Sm, Mo, and Zr.

Melissa Morris (Postdoctoral Research Associate, School of Earth & Space Exploration)  Ph.D. Mel photoArizona State University (2009) - Dr. Morris' (right) research focusses on star and planet formation, in particular the use of astrophysical modeling to determine conditions during the birth of  planetary systems.  Her particular interests include continuing the improvement of radiative transfer models of protoplanetary disks during planet formation, mainly through the application of mineralogical data of planetary materials, as well as meteoritics.  The oldest known material in our own planetary system can be found in meteorites and, by combining meteoritic data and the results of astrophysical modeling, Dr. Morris endeavors to further our understanding of the conditions that existed in the early solar nebula and exist in disks today.