A5020515245- Astro and Planetary Science
- Planetary Science and Exploration
- Geological and Geochemical Analysis
- Isotope Analysis in Ecology
- Space Exploration and Technology
- High-pressure geophysics and materials
- Geology and Paleoclimatology Research
- Stellar, planetary, and galactic studies
- Geochemistry and Geologic Mapping
- Nuclear Physics and Applications
- Hydrocarbon exploration and reservoir analysis
- Space Science and Extraterrestrial Life
- Image Processing and 3D Reconstruction
- Paleontology and Stratigraphy of Fossils
- Gamma-ray bursts and supernovae
- Spacecraft and Cryogenic Technologies
- Metallurgy and Cultural Artifacts
- Mineralogy and Gemology Studies
- Geomagnetism and Paleomagnetism Studies
- earthquake and tectonic studies
- Metal Extraction and Bioleaching
- Astrophysics and Star Formation Studies
- Archaeology and ancient environmental studies
- Spaceflight effects on biology
- Geological and Geophysical Studies
Curtin University
2015-2024
Australian Museum
2015-2024
Planetary Science Institute
2019-2024
Western Australian Museum
2016-2024
Johannes Gutenberg University Mainz
2013
Natural History Museum
2005-2012
Imperial College London
2005-2011
University of Washington
2008
Washington University in St. Louis
2004-2007
The Open University
2005
Orbital data indicate that the youngest volcanic units on Moon are basalt lavas in Oceanus Procellarum, a region with high levels of heat-producing elements potassium, thorium, and uranium. The Chang’e-5 mission collected samples these young lunar basalts returned them to Earth for laboratory analysis. We measure an age 1963 ± 57 million years determine their chemical mineralogical compositions. This constrains impact chronology inner Solar System thermal evolution Moon. There is no evidence...
Abstract— We studied 26 IAB iron meteorites containing silicate‐bearing inclusions to better constrain the many diverse hypotheses for formation of this complex group. These contain that fall broadly into five types: (1) sulfide‐rich, composed primarily troilite and abundant embedded silicates; (2) nonchondritic, silicate‐rich, comprised basaltic, troctolitic, peridotitic mineralogies; (3) angular, chondritic most common type, with approximately mineralogy closely resembling winonaites in...
Bulk chondritic meteorites and terrestrial planets show a monotonic depletion in moderately volatile elements relative to the Sun's photosphere CI carbonaceous chondrites. Although was most fundamental chemical process affecting inner solar nebula, debate continues as its cause. Carbonaceous chondrites are primitive rocks available us, fine-grained, volatile-rich matrix is component these rocks. Several models posit pristine matrix, with uniform CI-like chemistry across different chondrite...
Abstract The only martian rock samples on Earth are meteorites ejected from the surface of Mars by asteroid impacts. locations and geological contexts launch sites currently unknown. Determining impact is essential to unravel relations between evolution interior its surface. Here we adapt a Crater Detection Algorithm that compile database 90 million craters, allowing determine potential position these through observation secondary crater fields. We show Tooting 09-000015 both located in...
Abstract— We investigate the possibility that Mercury's crust is very reduced with FeO concentrations of less than ˜0.1 wt%. believe such a surface could have composition enstatite, plagioclase, diopside, and sulfide, similar to mineral assemblages found in aubritic meteorites. To test this hypothesis, we investigated spectra aubrites their constituent minerals as analogs for Mercury. some sulfides distinctive absorption features shortwards ˜0.6 μm may be apparent spectrum an object....
Triangulated observations of fireballs allow us to determine orbits and fall positions for meteorites. The great majority basaltic meteorites are derived from the asteroid 4 Vesta. We report on a recent that has orbital properties an oxygen isotope composition suggest distinct parent body. Although its orbit was almost entirely contained within Earth's orbit, modeling indicates it originated innermost main belt. Because meteorite body would likely be classified as V-type asteroid, precursors...
Abstract The formation and differentiation of the crust Mars in first tens millions years after its accretion can only be deciphered from incredibly limited records. martian breccia NWA 7034 paired stones is one them. This meteorite contains oldest igneous material ever dated: ~4.5 Ga old. However, source geological context have so far remained unknown. Here, we show that was ejected 5–10 Ma ago north-east Terra Cimmeria—Sirenum province, southern hemisphere Mars. More specifically, belongs...
Research Article| January 01, 2008 Record of Low-Temperature Alteration in Asteroids Michael E. Zolensky; Zolensky Astromaterials and Exploration Science, NASA Johnson Space Center, Houston, Texas 77058, U.S.A., michael.e.zolensky@nasa.gov Search for other works by this author on: GSW Google Scholar Alexander N. Krot; Krot Hawai’i Institute Geophysics Planetology, School Ocean Earth Science Technology, University at Manoa, Honolulu, Hawaii 96822, U.S.A. Gretchen Benedix Department...
Through an international collaboration between Imperial College London, the Ondřejov Observatory in Czech Republic and Western Australian Museum, installation of Desert Fireball Network Nullarbor Region Australia was completed 2007. Currently, Network, which is first to be established southern hemisphere, comprises four all-sky autonomous observatories providing precise triangulation fireball records constrain pre-atmospheric orbits fall positions meteorites over area approximately 200 000...
Zinc isotope compositions (δ66Zn) and concentrations were determined for metal samples of 15 iron meteorites across groups IAB, IIAB, IIIAB. Also analyzed troilite other inclusions from the IAB Toluca. Furthermore, first Zn data are presented metal–silicate partitioning experiments that conducted at 1.5 GPa 1650 K. Three with run durations between 10 60 min provide consistent partition coefficients ∼0.7 indicate fractionation molten silicate is either small (at less than about ±0.2‰) or...
Abstract Impact craters are the most common feature on Moon’s surface. Crater size–frequency distributions provide critical insight into timing of geological events, surface erosion rates, and impact fluxes. The crater follows a power law (meter‐sized few orders magnitude more numerous than kilometric ones), making it tedious to manually measure all within an area smallest sizes. We can bridge this gap by using machine learning algorithm. adapted Detection Algorithm work highest resolution...