A5005526748- Astro and Planetary Science
- Planetary Science and Exploration
- Geological and Geochemical Analysis
- Isotope Analysis in Ecology
- Paleontology and Stratigraphy of Fossils
- Geology and Paleoclimatology Research
- Geochemistry and Elemental Analysis
- High-pressure geophysics and materials
- Radioactive element chemistry and processing
- Stellar, planetary, and galactic studies
- Nuclear Physics and Applications
- Geomagnetism and Paleomagnetism Studies
- Astronomical and nuclear sciences
- Geochemistry and Geologic Mapping
- earthquake and tectonic studies
- Space Exploration and Technology
- Hydrocarbon exploration and reservoir analysis
- Radioactive contamination and transfer
- Silicon Effects in Agriculture
- Methane Hydrates and Related Phenomena
- Gamma-ray bursts and supernovae
- Nuclear physics research studies
- Astrophysics and Star Formation Studies
- Space Science and Extraterrestrial Life
- Groundwater and Isotope Geochemistry
Fermi National Accelerator Laboratory
2014-2025
University of Chicago
2016-2025
Nanjing University
2024
National Museum of Nature and Science
2024
Tohoku University
2024
Goddard Space Flight Center
2023
Lunar and Planetary Institute
2023
University of New Mexico
2023
University of Aizu
2023
Johnson Space Center
2023
High‐precision iron isotopic compositions for Fe‐bearing geological reference materials and chondrites with a wide range of matrices (e.g., silicates, oxides, organic‐bearing materials) are reported. This comprehensive data set should serve as studies across biological disciplines both quality assurance inter‐laboratory calibration. Where comparison is available, the most measured in this study were agreement previously published within quoted uncertainties. Recommendations reporting future...
Magmatic differentiation helps produce the chemical and petrographic diversity of terrestrial rocks. The extent to which magmatic fractionates nonradiogenic isotopes is uncertain for some elements. We report analyses iron in basalts from Kilauea Iki lava lake, Hawaii. isotopic compositions (56Fe/54Fe) late-stagemeltveins are 0.2 permil (per thousand) greater than values olivine cumulates. Olivine phenocrysts up 1.2 per thousand lighter those whole These results demonstrate that fractionate...
Research Article| January 01, 2017 Iron Isotope Systematics Nicolas Dauphas; Dauphas Origins Lab, Department of the Geophysical Sciences and Enrico Fermi Institute, The University Chicago, 5734 South Ellis Avenue, Chicago IL 60637, USA, dauphas@uchicago.edu Search for other works by this author on: GSW Google Scholar Seth G. John; John Southern California, Earth Science, Marine Trace Element Laboratory, 3651 Trousdale Pkwy, Los Angeles, CA 90089, sethjohn@usc.edu Olivier Rouxel IFREMER,...
Isotopic variations usually follow mass-dependent fractionation, meaning that the relative in isotopic ratios scale with difference mass of isotopes involved (e.g., δ 17 O ≈ 0.5×δ 18 O). In detail, however, dependence is not always same, and different natural processes can define distinct slopes three-isotope diagrams. These are subtle, but improvements analytical capabilities now allow precise measurement these effects make it possible to draw inferences about caused them reaction kinetics...
Carbonaceous meteorites are thought to be fragments of C-type (carbonaceous) asteroids. Samples the asteroid (162173) Ryugu were retrieved by Hayabusa2 spacecraft. We measured mineralogy and bulk chemical isotopic compositions samples. The samples mainly composed materials similar those carbonaceous chondrite meteorites, particularly CI (Ivuna-type) group. consist predominantly minerals formed in aqueous fluid on a parent planetesimal. primary altered fluids at temperature 37° ± 10°C, about...
Research Article| January 01, 2017 Non-Traditional Stable Isotopes: Retrospective and Prospective Fang-Zhen Teng; Teng Isotope Laboratory, Department of Earth Space Sciences, University Washington, Seattle WA 98195, USA, fteng@uwashington.edu Search for other works by this author on: GSW Google Scholar Nicolas Dauphas; Dauphas Origins Lab, the Geophysical Sciences Enrico Fermi Institute, The Chicago, Chicago IL 60637, dauphas@uchicago.edu James M. Watkins Oregon, Eugene OR 97403,...
Earth exhibits a dichotomy in elevation and chemical composition between the continents ocean floor. Reconstructing when this arose is important for understanding plate tectonics started how supply of nutrients to oceans changed through time. We measured titanium isotopic shales constrain continental crust exposed weathering found that all ages have uniform composition. This can only be explained if emerged was predominantly felsic (silica-rich) since 3.5 billion years ago, requiring an...
Abstract An Erratum has been published for this article in Mass Spectrometry Reviews 25: 831–832, 2006 . Although the processes that govern iron isotope variations nature are just beginning to be understood, multiple studies attest of virtue system solve important problems geosciences and biology. In article, we review recent advances geochemistry, cosmochemistry, biochemistry isotopes. Section 2, briefly address question nucleosynthesis Fe 3, describe different methods purifying analyzing...
Archean rocks may provide a record of early Earth environments. However, such have often been metamorphosed by high pressure and temperature, which can overprint the signatures their original formation. Here, we show that banded from Isua, Akilia, Innersuartuut, Greenland, are enriched in heavy iron isotopes 0.1 to 0.5 per mil atomic mass unit relative igneous worldwide. The observed enrichments compatible with transport, oxidation, subsequent precipitation ferrous emanating hydrothermal...