Katherine R Bermingham

Katherine R Bermingham
University of Maryland, College Park | UMD, UMCP, University of Maryland College Park · Department of Geology

PhD

About

38
Publications
3,805
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722
Citations
Citations since 2017
18 Research Items
612 Citations
2017201820192020202120222023050100150
2017201820192020202120222023050100150
2017201820192020202120222023050100150
2017201820192020202120222023050100150

Publications

Publications (38)
Article
The IC iron meteorite group is characterized utilizing nucleosynthetic mass-independent isotopic compositions and ¹⁸²W age constraints, coupled with siderophile element concentration measurements and modeling of crystal-liquid fractionation processes. The six IC irons analyzed, Arispe, Bendego, Chihuahua City, Nocoleche, NWA 2743, and Winburg have...
Chapter
Full-text available
The NASA Dawn mission, launched in 2007, aimed to visit two of the most massive protoplanets of the main asteroid belt: Vesta and Ceres. The aim was to further our understanding of the earliest days of the Solar System, and compare the two bodies to better understand their formation and evolution. This book summarises state-of-the-art results from...
Article
Full-text available
The past decade has seen significant advancements in analytical capabilities and with it a marked increase in the use of Ca isotopes to advance our understanding of the Solar System's and Earth's evolution. Here, mass-dependent and non-mass-dependent Ca isotopic variations in bulk meteorites and chondrite components are discussed. This contribution...
Article
Full-text available
Understanding the formation of our planetary system requires identification of the materials from which it originated and the accretion processes that produced the planets. The compositional evolution of the solar system can be constrained by synthesizing astronomical datasets and numerical models with elemental and isotopic compositions from objec...
Article
Full-text available
The Moon forming giant impact marks the end of the main stage of Earth’s accretion and sets the stage for the subsequent evolution of our planet. The giant impact theory has been the accepted model of lunar origin for 40 years, but the parameters of the impact and the mechanisms that led to the formation of the Moon are still hotly debated. Here we...
Article
Full-text available
The eight iron meteorites currently classified as belonging to the IIC group were characterized with respect to the compositions of 21 siderophile elements. Several of these meteorites were also characterized for mass independent isotopic compositions of Mo, Ru and W. Chemical and isotopic data for one, Wiley, indicate that it is not a IIC iron met...
Article
Identifying Earth’s building blocks from terrestrial rocks is challenging because these ingredients have become mixed as the planet evolved. Evidence of an unknown building block in ancient rocks provides fresh insight. Evidence of mantle material preserved from before the late veneer.
Article
Full-text available
The nucleosynthetic Mo, Ru, and W isotopic compositions of the South Byron Trio iron meteorite grouplet (SBT) are consistent with all three meteorites originating on a single parent body that formed in the carbonaceous chondrite (CC) isotopic domain within the Solar nebula. Consistent with a common origin, the highly siderophile element (HSE) conce...
Article
When corrected for the effects of cosmic ray exposure, Mo and Ru nucleosynthetic isotope anomalies in iron meteorites from at least nine different parent bodies are strongly correlated in a manner consistent with variable depletion in s-process nucleosynthetic components. In contrast to prior studies, the new results show no significant deviations...
Article
The Ca isotope composition of meteorites and their components may vary due to mass-dependent and/or -independent isotope effects. In order to evaluate the origin of these effects, five amoeboid olivine aggregates (AOAs), three calcium aluminum inclusions (CAIs), five chondrules (C), a dark inclusion from Allende (CV3), two dark fragments from North...
Article
The approximately chondritic relative, and comparatively high absolute mantle abundances of the highly siderophile elements (HSE), suggest that their concentrations in the bulk silicate Earth were primarily established during a final ∼0.5 to 1% of “late accretion” to the mantle, following the cessation of core segregation. Consequently, the isotopi...
Article
The IAB iron meteorite complex consists of a main group (MG) and five chemical subgroups (sLL, sLM, sLH, sHL, and sHH). Here, mass-independent Mo and radiogenic ¹⁸²W isotope compositions are reported for IAB complex meteorites to evaluate the genetics and chronology, respectively, of the MG and subgroups. Osmium isotopes are used to correct for cos...
Article
Here we describe a new analytical technique for the high-precision measurement of ¹⁸²W/¹⁸⁴W and ¹⁸³W/¹⁸⁴W using negative thermal ionization mass spectrometry (N-TIMS). We improve on the recently reported method of Trinquier et al. (2016), which described using Faraday cup collectors coupled with amplifiers utilizing 10¹³ Ω resistors to continuously...
Article
Procedures for the separation, purification, and high-precision analysis of mass independent isotopic variations in Mo using negative thermal ionization mass spectrometry are reported. Separation and purification of Mo from silicate and metal matrices is achieved using a two-stage anion exchange chromatographic procedure. Molybdenum is ionized as t...
Article
Siderophile trace element abundances and the 187Re-187Os isotopic systematics of the metal phases of 58 IAB complex iron meteorites were determined in order to investigate formation processes and how meteorites within chemical subgroups may be related. Close adherence of 187Re-187Os isotopic data of most IAB iron meteorites to a primordial isochron...
Article
A refined method for the isolation, purification, and high precision measurement of Ru isotope compositions in natural samples by negative thermal ionization mass spectrometry (N-TIMS) is reported. After chemical purification of Ru using ion exchange chromatography and microdistillation techniques, the Ru isotopic composition is measured as RuO3− v...
Article
Full-text available
Understanding core formation in meteorite parent bodies is critical for constraining the fundamental processes of protoplanet accretion and differentiation within the solar protoplanetary disk. We report variations of 5 to 20 parts per million in 182W, resulting from the decay of now-extinct 182Hf, among five magmatic iron meteorite groups. These 1...
Article
The abundance and distribution of isotopes throughout the Solar System can be used to constrain the number and type of nucleosynthetic events that contributed material to the early nebula. Barium is particularly well suited to quantifying the degree of isotope heterogeneity in the Solar System because it comprises seven stable isotopes that were sy...
Article
Results from a time-dependent multi-reservoir mixing code are used to constrain the origin(s) of nucleosynthetic isotope variations on the whole rock scale.
Conference Paper
W- and Os-isotope and HSE abundance data from IAB iron meteorites are used to constrain the chronology and crystallization history of IAB subgroups.
Article
Full-text available
Small 182W variations between iron meteorite parent bodies indicate distinct times of core formation, but coeval accretion at 0.2-0.7 m.y. after CAI formation.
Article
New Ba-isotope data from Allende CAIs may provide direct evidence for live ^135Cs in the early solar system.
Article
Several nucleosynthetic processes contributed material to the Solar System, but the relative contributions of each process, the timing of their input into the solar nebula, and how well these components were homogenized in the solar nebula remain only partially constrained. The Ba isotope system is particularly useful in addressing these issues bec...
Conference Paper
Using Pt-W-isotope correlations we obtained pre-exposure ^182W/^184W for the major iron meteorite groups (IIAB, IIIAB, IVA) that are unaffected by cosmic rays.
Conference Paper
IAB complex iron meteorite crystallization was studied using new HSE data. The genetic relationship of two groups in the complex was evaluated with Mo isotopes.
Article
A petrographic and geochemical study was undertaken to characterize Jiddat al Harasis (JaH) 556, a howardite find from the Sultanate of Oman. JaH 556 is a polymict impact melt breccia containing highly shocked clasts, including mosaicized olivine and recrystallized plagioclase, set in a finely recrystallized vesicular matrix (grain diameter <5-10 μ...
Article
Full-text available
Lynch 002, found in September 2010, is a highly brecciated meteorite containing diverse lunar lithologies and mineral phases, reflecting a wide range of igneous activity and multiple phases of impact and regolith processing.
Book
Full-text available
Evolution, broadly defined as a gradual development that may lead to a more advanced or complex form, is the most widely applicable scientific concept to understand processes at all scales, from the formation of Earth to human societies. In particular Charles Darwin’s theory of evolution based on heritable variation and selection is now being appli...
Article
We report on the Ba isotope abundances in eleven bulk meteorite and CAI samples. Our data indicates that bulk meteorite samples are isotopically indistinguishable from terrestrial standards and that some CAIs possess an excess in 135Ba of ~ ½ ε unit.
Article
The degree of isotopic homogeneity in the early Solar System provides information about its environment and dynamic evolution. If the Solar System is found to be isotopically heterogeneous, regional isochrons will have to be developed to obtain reliable age information on cosmochemical processes. Isotopic homogeneity in the Solar System can be inve...
Article
Whole rock major and trace element data for 12 noncumulate eucrites reveal a new variety with LREE-depleted patterns that cannot have formed either by melting of a primitive asteroid or fractional crystallization of a main group parental magma.

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