Auflistung Geochemie, Mineralogie, Petrologie nach Erscheinungsdatum
Anzeige der Dokumente 1-20 von 507
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Silicon and iron isotopes in components of enstatite chondrites: Implications for metal–silicate–sulfide fractionation in the solar nebula
; ; (Meteoritics & Planetary Science, 2023-06-28)
Silicon and iron isotope compositions of different physically separated components of enstatite chondrites (EC) were determined in this study to understand the role of nebular and planetary scale events in fractionating ... -
Towards joint in situ determination of pressure and temperature in the large volume press exclusively from X‐ray diffraction
(Journal of Synchrotron Radiation, 2023-06-21)Since high‐pressure devices have been used at synchrotron facilities, accurate determination of pressure and temperature in the sample has been a crucial objective, particularly for experiments that simulate the Earth's ... -
Stable Carbon Isotope Signature of Methane Released From Phytoplankton
; ; ; ; ; ; ; ; ; ; (Geophysical Research Letters, 2023-06-20)
Abstract Aquatic ecosystems play an important role in global methane cycling and many field studies ...
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Temporal Variability of Fluvial Sand Composition: An Annual Time Series From Four Rivers in SW Germany
; ; ; ; ; ; (Journal of Geophysical Research: Earth Surface, 2023-06-15)
Abstract The sampling of fluvial sediment is subject to many sources of uncertainty, for example, ...
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The Temperature and Composition of the Mantle Sources of Martian Basalts
; ; ; ; (Geophysical Research Letters, 2023-06-08)
Abstract The composition of basaltic melts in equilibrium with the mantle can be determined for ...
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A note on the wedge reversion antisymmetry operation and 51 types of physical quantities in arbitrary dimensions
(Acta Crystallographica Section A, 2023-06-05)The paper by Gopalan [
(2020). Acta Cryst. A76 , ... -
Phase‐Field Simulation of Texture Evolution in Magmatic Rocks
; ; (Journal of Geophysical Research: Solid Earth, 2023-05-24)
Abstract The tool of phase‐field modeling for the prediction of chemical as well as microstructural ...
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Triple‐Element Stable Isotope Analysis of Chloromethane Emitted by Royal Fern and Degraded by Club Moss
;; ; ; (Journal of Geophysical Research: Biogeosciences, 2023-05-17)
Abstract Chloromethane (CH3Cl) is the most abundant natural chlorinated organic compound ...
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Dynamic Two‐Phase Flow Modeling of Melt Segregation in Continental Crust: Batholith Emplacement Versus Crustal Convection, With Implications for Magmatism in Thickened Plateaus
; ; ; (Geochemistry, Geophysics, Geosystems, 2023-05-10)
Abstract Magmatic processes in the continental crust such as crustal convection, melt ascent, ...
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POWTEX visits POWGEN
(Journal of Applied Crystallography, 2023-04-25)The high‐intensity time‐of‐flight (TOF) neutron diffractometer POWTEX for powder and texture analysis is currently being built prior to operation in the eastern ...
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Upper limits of water contents in olivine and orthopyroxene of equilibrated chondrites and several achondrites
; ; (Meteoritics & Planetary Science, 2023-04-13)
Abstract Hydroxyl defects in nominally anhydrous minerals (NAMs) were potential carriers of water ...
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Energy‐dispersive X‐ray stress analysis under geometric constraints: exploiting the material's inherent anisotropy
(Journal of Applied Crystallography, 2023-04-01)Two data evaluation concepts for X‐ray stress analysis based on energy‐dispersive diffraction on polycrystalline materials with cubic crystal structure, almost random crystallographic texture and strong single‐crystal ... -
Use of electron backscatter diffraction patterns to determine the crystal lattice. Part 1. Where is the Bragg angle?
(Journal of Applied Crystallography, 2023-02-24)The derivation of a crystal structure and its phase‐specific parameters from a single wide‐angle backscattered Kikuchi diffraction pattern requires reliable extraction of the Bragg angles. By means of the first derivative ... -
Use of electron backscatter diffraction patterns to determine the crystal lattice. Part 2. Offset corrections
(Journal of Applied Crystallography, 2023-02-24)A band width determination using the first derivative of the band profile systematically underestimates the true Bragg angle. Corrections are proposed to compensate for the resulting offset Δa/a of the mean lattice parameters ... -
Use of electron backscatter diffraction patterns to determine the crystal lattice. Part 3. Pseudosymmetry
(Journal of Applied Crystallography, 2023-02-24)A pseudosymmetric description of the crystal lattice derived from a single wide‐angle Kikuchi pattern can have several causes. The small size (<15%) of the sector covered by an electron backscatter diffraction pattern, the ... -
Atmospheric CO2 Concentration Based on Boron Isotopes Versus Simulations of the Global Carbon Cycle During the Plio‐Pleistocene
(Paleoceanography and Paleoclimatology, 2023-02-21)
Atmospheric carbon dioxide concentrations (pCO2) beyond ice core records have been reconstructed from δ11B derived from planktic foraminifera found in equatorial sediment cores. Here, I applied a ... -
Crystal diffraction prediction and partiality estimation using Gaussian basis functions
(Acta Crystallographica Section A, 2023-02-17)The recent diversification of macromolecular crystallographic experiments including the use of pink beams, convergent electron diffraction and serial snapshot crystallography has shown the limitations of using the Laue ... -
Systematic and Temporal Geochemical Changes in the Upper Deccan Lavas: Implications for the Magma Plumbing System of Flood Basalt Provinces
; ; ; (Geochemistry, Geophysics, Geosystems, 2023-02-13)
Large Igneous Provinces (LIPs) are unusual volcanic events in which massive amounts of melt (∼106 km3) erupt in relatively short time periods (<106 years). Most LIP magmas have undergone extensive fractional crystallization ... -
Fingerprinting Kinetic Isotope Effects and Diagenetic Exchange Reactions Using Fluid Inclusion and Dual‐Clumped Isotope Analysis
; ; ; ; ; ; ; ; ; (Geochemistry, Geophysics, Geosystems, 2023-02-09)
Geochemical analyses of carbonate minerals yield multiple parameters which can be used to estimate the temperature and water composition at which they formed. Analysis of fluid trapped in minerals is a potentially powerful ... -
Authigenic and Detrital Carbonate Nd Isotope Records Reflect Pulses of Detrital Material Input to the Labrador Sea During the Heinrich Stadials
; ; ; ; ; (Paleoceanography and Paleoclimatology, 2023-01-28)
Limited constraints on the variability of the deep‐water production in the Labrador Sea complicate reconstructions of the strength of the Atlantic Meridional Overturning Circulation (AMOC) during the Late Quaternary. Large ...
