Auflistung Geochemie, Mineralogie, Petrologie nach Erscheinungsdatum
Anzeige der Dokumente 61-80 von 567
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Geostandards and Geoanalytical Research Bibliographic Review 2021
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This GGR Bibliographic Review is a survey of approximately 5200 geoanalytical publications for the year 2021. Selected articles, numbering over 340, containing measurement results for relevant geological and environmental ... -
The PERCIVAL detector: first user experiments
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The PERCIVAL detector is a CMOS imager designed for the soft X‐ray regime at photon sources. Although still in its final development phase, it has recently seen its first user experiments: ptychography at a free‐electron ... -
Updates in SASfit for fitting analytical expressions and numerical models to small‐angle scattering patterns
(Journal of Applied Crystallography, 2022-11-21)Small‐angle scattering is an increasingly common method for characterizing particle ensembles in a wide variety of sample types and for diverse areas of application. SASfit has been one of the most comprehensive and flexible ... -
Automatic bad‐pixel mask maker for X‐ray pixel detectors with application to serial crystallography
(Journal of Applied Crystallography, 2022-11-21)X‐ray crystallography has witnessed a massive development over the past decade, driven by large increases in the intensity and brightness of X‐ray sources and enabled by employing high‐frame‐rate X‐ray detectors. The ... -
Authigenic Formation of Clay Minerals in the Abyssal North Pacific
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Present estimates of the biogeochemical cycles of calcium, strontium, and potassium in the ocean reveal large imbalances between known input and output fluxes. Using pore fluid, incubation, and solid sediment data from ... -
Disk transport rates from Ti isotopic signatures of refractory inclusions
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The early solar system was a dynamic period during which the formation of early solids set into motion the process of planet building. Although both astrophysical observations and theoretical modeling demonstrate the ... -
Quantifying Ice‐Sheet Derived Lead (Pb) Fluxes to the Ocean; A Case Study at Nioghalvfjerdsbræ
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Concentrations of the toxic element lead (Pb) are elevated in seawater due to historical emissions. While anthropogenic atmospheric emissions are the dominant source of dissolved Pb (dPb) to the Atlantic Ocean, evidence ... -
Zircon Dates Long‐Lived Plume Dynamics in Oceanic Islands
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Abstract In this contribution we report the first systematic study of zircon U‐Pb geochronology ...
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Extending MIEZE spectroscopy towards thermal wavelengths
(Journal of Applied Crystallography, 2022-10-27)A modulation of intensity with zero effort (MIEZE) setup is proposed for high‐resolution neutron spectroscopy at momentum transfers up to 3 Å−1, energy transfers up to 20 meV and an energy resolution in the ... -
Chemical Geodynamics Insights From a Machine Learning Approach
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The radiogenic isotope heterogeneity of oceanic basalts is often assessed using 2D isotope ratio diagrams. But because the underlying data are at least six dimensional (87Sr/86Sr, 143Nd/144Nd, 176Hf/177Hf, and 208,207,20 ... -
Young magmatism and Si‐rich melts on Mars as documented in the enriched gabbroic shergottite NWA 6963
; ; ; ; (Meteoritics & Planetary Science, 2022-10-17)
Enriched shergottites contain interstitial Si‐rich mesostasis; however, it is unclear whether such mesostasis is formed by impact or magmatic processes. We use laser ablation multicollector inductively coupled plasma mass ... -
Experimentally Induced Thermal Fatigue on Lunar and Eucrite Meteorites—Influence of the Mineralogy on Rock Breakdown
; (Journal of Geophysical Research: Planets, 2022-10-07)
Thermal fatigue has been proven to be of fundamental importance for the nature and evolution of surfaces of airless bodies in the solar system. It is a rock erosive process acting in conjunction with meteoroid bombardment. ... -
X‐ray diffraction with micrometre spatial resolution for highly absorbing samples
(Journal of Synchrotron Radiation, 2022-10-05)X‐ray diffraction with high spatial resolution is commonly used to characterize (poly)crystalline samples with, for example, respect to local strain, residual stress, grain boundaries and texture. However, the investigation ... -
Domain Auto Finder (DAFi) program: the analysis of single‐crystal X‐ray diffraction data from polycrystalline samples
(Journal of Applied Crystallography, 2022-09-29)This paper presents the Domain Auto Finder (DAFi) program and its application to the analysis of single‐crystal X‐ray diffraction (SC‐XRD) data from multiphase mixtures of microcrystalline solids and powders. Superposition ... -
HTD2: a single‐crystal X‐ray diffractometer for combined high‐pressure/low‐temperature experiments at laboratory scale
(Journal of Applied Crystallography, 2022-09-29)High‐pressure (HP) X‐ray diffraction experiments at low temperature (LT) require dedicated instruments as well as non‐standard sample environments and measuring strategies. This is especially true when helium cryogenic ... -
Spatial and temporal dynamics of water isotopes in the riverine‐marine mixing zone along the German Baltic Sea coast
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River estuaries are characterized by mixing processes between freshwater discharge and marine water masses. Since the first are depleted in heavier stable isotopes compared with the marine realm, estuaries often show a ... -
Sediment Release in the Benguela Upwelling System Dominates Trace Metal Input to the Shelf and Eastern South Atlantic Ocean
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Upwelling of subsurface waters injects macronutrients (fixed N, P, and Si) and micronutrient trace metals (TMs) into surface waters supporting elevated primary production in Eastern Boundary Upwelling Regions. The eastern ... -
Developing a Laser Induced Liquid Beam Ion Desorption Spectral Database as Reference for Spaceborne Mass Spectrometers
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Spaceborne impact ionization mass spectrometers, such as the Cosmic Dust Analyzer on board the past Cassini spacecraft or the SUrface Dust Analyzer being built for NASA's upcoming Europa Clipper mission, are of crucial ... -
A New Method for Determining Fluid Flux at High Pressures Applied to the Dehydration of Serpentinites
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A new method to determine fluid flux at high pressures and temperatures has been developed and used to study serpentinites at subduction zone conditions. Drill cores of a natural antigorite‐serpentinite with a strong ... -
Site dependence of the magnetocaloric effect in Mn5−xFexSi3
(Journal of Applied Crystallography, 2022-09-06)The nuclear and magnetic structures of Mn3Fe2Si3 are investigated in the temperature range from 20 to 300 K. The magnetic properties of Mn3Fe2Si3 were measured on a single crystal. The compound undergoes a paramagnetic to ...
