A5072531835- Planetary Science and Exploration
- Astro and Planetary Science
- Space Exploration and Technology
- Geological and Geochemical Analysis
- Space Science and Extraterrestrial Life
- Geology and Paleoclimatology Research
- Paleontology and Stratigraphy of Fossils
- Isotope Analysis in Ecology
- Geochemistry and Elemental Analysis
- Geochemistry and Geologic Mapping
- Hydrocarbon exploration and reservoir analysis
- Space exploration and regulation
- High-pressure geophysics and materials
- Geological and Geophysical Studies
- earthquake and tectonic studies
- Marine and environmental studies
- Geomagnetism and Paleomagnetism Studies
- Reservoir Engineering and Simulation Methods
- Methane Hydrates and Related Phenomena
- Spaceflight effects on biology
- Geological Studies and Exploration
- Analytical chemistry methods development
- Spacecraft and Cryogenic Technologies
- Scientific Research and Discoveries
- Inorganic Fluorides and Related Compounds
University of Notre Dame
2016-2025
University of Central Florida
2023-2024
Lunar and Planetary Institute
2014-2023
Goddard Space Flight Center
2023
University of New Mexico
2023
University of Aizu
2023
Johnson Space Center
2023
Johns Hopkins University Applied Physics Laboratory
2023
Washington University in St. Louis
2023
University of Maryland, College Park
2023
Microanalytical trace element techniques (such as ion probe or laser ablation ICP‐MS) are hampered by a lack of well characterized, homogeneous standards. Two silicate glass reference materials produced National Institute Standards and Technology (NIST), NIST SRM 610 612, have been shown to be spiked with up sixty one elements at nominal concentrations 500 μg g‐1 50 respectively. These samples (supplied 3 mm wafers) equivalent 611 613 respectively (which supplied 1 becoming more widely used...
The Hawaiian-Emperor hotspot track has a prominent bend, which served as the basis for theory that Hawaiian hotspot, fixed in deep mantle, traced change plate motion. However, paleomagnetic and radiometric age data from samples recovered by ocean drilling define an age-progressive paleolatitude history, indicating Emperor Seamount trend was principally formed rapid motion (over 40 millimeters per year) of plume during Late Cretaceous to early-Tertiary times (81 47 million years ago)....
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...
The preservation of the iridium-rich layer within Chicxulub crater captures timing K-Pg boundary events.
Remote sensing observations have shown that the far side of Moon (lunar farside) has different geology and rock composition to those nearside, including abundances potassium, rare earth elements, phosphorus (collectively known as KREEP). The Chang’e-6 (CE-6) spacecraft collected samples from South Pole–Aitken (SPA) basin on farside brought them Earth. We used lead-lead rubidium-strontium isotope systems date low-titanium basalt in a CE-6 sample, finding consistent age 2830 (±5) million...
Three groups of eclogite xenoliths have been identified from the DeBruyn and Martin Mine Bellsbank kimberlite, South Africa. These eclogites are divided into three on basis petrography, clinopyroxene garnet mineral chemistry, rare earth element (REE) contents whole rocks, clinopyroxenes, garnets. Abundances REE garnet-clinopyroxene Kd's consistent with a petrogenesis by fractional crystallization for Group A eclogites, but not Groups We suggest, bulk-rock major-element analyses reconstructed...
Automobile catalytic converters are dispersing platinum-group elements (PGEs) Rh, Pt, and Pd into the environment (1−3). This paper represents first detailed study to assess PGE content of soils grasses from U.S. roadsides. These were analyzed using cation exchange pretreatment ultrasonic nebulizer-ICP-MS (4). Highway several urban sites showed Pt abundances 64−73 ng/g immediately adjacent roadside, with corresponding Rh 18−31 3−7 ng/g, respectively. All most statistically above local...
Current models for the Moon's formation have yet to fully account thermal evolution of Moon in presence H2O and other volatiles. Of particular importance is chlorine, since most lunar samples are characterised by unique heavy δ37Cl values, significantly deviating from those planetary materials, including Earth, which values cluster around ∼0‰. In order unravel cause(s) chlorine isotope signature, we performed a comprehensive study high-precision situ Cl measurements apatite suite Apollo with...
Impact glasses found in lunar soils provide a possible window into the impact history of inner solar system. However, their use for precise reconstruction this is limited by an incomplete understanding physical mechanisms responsible origin and distribution relationships to local regional geology. Here, we report U-Pb isotopic dates chemical compositions from Chang'e-5 soil quantitative models melt formation ejection that account these glasses. The predominantly provenance indicated...
As a first step in preparing for the return of samples from Moon by Artemis Program, NASA initiated Apollo Next Generation Sample Analysis Program (ANGSA). ANGSA was designed to function as low-cost sample mission and involved curation analysis previously returned 17 that remained unopened or stored under unique conditions 50 years. These include lower portion double drive tube sealed on lunar surface, upper had unopened, variety at −27 °C approximately constitutes preliminary examination...
The island of Malaita, Solomon Islands, represents the obducted southern margin Ontong Java Plateau (OJP). basement Malaita formed during first and possibly largest plateau-building magmatic event at ∼122 ± 3 Ma. It subsequently drifted passively northwards amassing a 1–2 km thickness pelagic sediment overburden. A major change in OJP tectonics occurred Eocene, initiated by passing over Samoan or Raratongan hotspot. Extension facilitated increased sedimentation basin formation (e.g.,...
Ocean Drilling Program (ODP) Leg 183 was designed to investigate the origin and evolution of large igneous province composed Kerguelen Plateau Broken Ridge. Of eight sites drilled, basalt recovered from seven, five on plateau two We present results four these sites, 1136, 1138, 1141 1142. Although this is interpreted as being derived mantle plume, geochemical characteristics some parts indicate a role for continental lithosphere. The 118–119 Ma flows in Southern (Site 1136) have more subtle...
New trace element data have been generated by inductively coupled plasma‐mass spectrometry (ICP‐MS) for 65 high‐ and low‐Ti mare basalts from the Apollo 11, 12, 14, 15, 17 landing sites. These demonstrate that ratios of high field strength elements yttrium are generally chondritic in source regions but nonchondritic high‐Ti potassium, rare earth elements, phosphorus (KREEP); such differences can be explained addition subtraction (respectively) ilmenite. This interpretation is consistent with...
Abstract Northwest Africa ( NWA ) 4734 is an unbrecciated basaltic lunar meteorite that nearly identical in chemical composition to meteorites 032 and LaPaz Icefield LAP 02205. We have conducted a geochemical, petrologic, mineralogic, Sm‐Nd, Rb‐Sr, Ar‐Ar isotopic study of these constrain their petrologic relationships the origin young mare basalts. low‐Ti basalt with low Mg* (36.5) elevated abundances incompatible trace elements (e.g., 2.00 ppm Th). The Sm‐Nd isotope system dates isochron...
Direct analysis of the composition Mars is possible through delivery meteorites to Earth. Martian include ∼165 2400 Ma shergottites, originating from depleted enriched mantle sources, and ∼1340 nakhlites chassignites, formed by low degree partial melting a source. To date, no unified model has been proposed explain petrogenesis these distinct rock types, despite their importance for understanding formation evolution Mars. Here we report coherent geochemical dataset chassignites revealing...