A5031544050- Planetary Science and Exploration
- Astro and Planetary Science
- Geological and Geochemical Analysis
- Isotope Analysis in Ecology
- Space Exploration and Technology
- Geochemistry and Geologic Mapping
- Geology and Paleoclimatology Research
- Radioactive element chemistry and processing
- Radioactive contamination and transfer
- earthquake and tectonic studies
- Archaeology and ancient environmental studies
- High-pressure geophysics and materials
- Radioactivity and Radon Measurements
- Geomagnetism and Paleomagnetism Studies
- Paleontology and Stratigraphy of Fossils
- Geochemistry and Elemental Analysis
- Cultural Heritage Materials Analysis
- Methane Hydrates and Related Phenomena
- Mineralogy and Gemology Studies
- Analytical chemistry methods development
- Chemical and Physical Properties in Aqueous Solutions
- Heavy metals in environment
- Structural Response to Dynamic Loads
- Mercury impact and mitigation studies
- Amazonian Archaeology and Ethnohistory
Swedish Museum of Natural History
2014-2020
Curtin University
2020
University of Maryland, College Park
2007-2016
University of Notre Dame
2013
Notre Dame University
2012
L-3 Communications (United States)
1915
Despite more than 40 years of studying Apollo samples, the age and early evolution Moon remain contentious. Following formation in aftermath a giant impact, resulting Lunar Magma Ocean (LMO) is predicted to have generated major geochemically distinct silicate reservoirs, including sources lunar basalts. Samples these basalts, therefore, provide unique opportunity characterize reservoirs. However, precise timing extent geochemical fractionation poorly constrained, not least due difficulty...
Martian meteorite NWA 7533 is a regolith breccia that compositionally resembles the surface measured by orbiters and landers. contains monzonitic clasts have zircon with U–Pb ages of 4.428 Ga. The Pb isotopic compositions plagioclase alkali feldspars, as well chlorapatite in been Secondary Ion Mass Spectrometry (SIMS). from yield an age 1.357±81 Ga (2σ). least radiogenic K-feldspar lie within error Geochron. These data indicate are product differentiation history includes residence reservoir...
Abstract Northwest Africa 7533, a polymict Martian breccia, consists of fine‐grained clast‐laden melt particles and microcrystalline matrix. While both matrix contain medium‐grained noritic‐monzonitic material crystal clasts, the also contains lithic clasts with zoned pigeonite augite plus two feldspars, microbasaltic vitrophyric spherules, shards. The rocks clump‐like aggregates orthopyroxene surrounded by aureoles plagioclase. Some shards vesicular resemble pyroxene‐plagioclase...
Lunar meteorites provide a potential opportunity to expand the study of ancient (>4000 Ma) basaltic volcanism on Moon, which there are only few examples in Apollo sample collection. Secondary Ion Mass Spectrometry (SIMS) was used determine Pb isotopic compositions multiple mineral phases (Ca-phosphates, baddeleyite K-feldspar, K-rich glass and plagioclase) two lunar meteorites, Miller Range (MIL) 13317 Kalahari (Kal) 009. These data were calculate crystallisation ages 4332±2 Ma (95%...
In the event of a rogue nuclear attack or interception illicit materials, timely forensic investigations are critical for accurate source attribution. Uranium (U) and plutonium (Pu) isotopic ratios intercepted materials postdetonation samples are, perhaps, most valuable evidence in modern forensics. These simultaneously provide information regarding material's ''age'' (i.e., time elapsed since last purification), actinide concentrations, relevant ratios/enrichment values. Consequently, these...
Research Article| February 02, 2018 A 4463 Ma apparent zircon age from the Jack Hills (Western Australia) resulting ancient Pb mobilization Rongfeng Ge; Ge * 1The Institute for Geoscience Research, Department of Applied Geology, Curtin University, Perth, WA 6845, Australia2State Key Laboratory Mineral Deposits School Earth Sciences and Engineering, Nanjing 210093, China *E-mails: gerongfeng@gmail.com; S.Wilde@curtin.edu.au Search other works by this author on: GSW Google Scholar Simon A....
Abstract Constraining the duration of magmatic activity on Moon is essential to understand how lunar mantle evolved chemically through time. Determining age and initial isotopic compositions mafic meteorites a critical step in defining periods that occurred during history constrain chemical characteristics components involved sources magmas. We have used situ Pb‐Pb SIMS technique investigate eight gabbros basalts, including six from Northwest Africa (NWA) 773 clan (NWA 2727, NWA 2700, 3333,...
Abstract Secondary ion mass spectrometry ( SIMS ) U‐Pb ages of Ca‐phosphates from four texturally distinct breccia samples (72255, 76055, 76015, 76215) collected at the Apollo 17 landing site were obtained in an attempt to identify whether they represent a single or several impact event(s). The determined ages, combined with inferences petrologic relationships, may indicate two possibly three different events 3920 ± 3 Ma, 3922 5 and 3930 Ma (all errors 2σ). Searching for possible sources...