Auflistung Geochemie, Mineralogie, Petrologie nach Titel
Anzeige der Dokumente 385-404 von 567
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Quantitative Rietveld-Analyse von amorphen Materialien - am Beispiel von Hochofenschlacken und Flugaschen
(Univ. Halle, 2007)Zsfassung in engl. Sprache -
Quartz and cristobalite ballen in impact melt rocks from the Ries impact structure, Germany, formed by dehydration of shock‐generated amorphous phases
(Meteoritics & Planetary Science, 2020-11-24)Quartz and cristobalite ballen aggregates surrounded by dendritic cristobalite in gneiss clasts of impact melt rocks from the Ries impact structure are analyzed by Raman spectroscopy, microscopy, and electron backscattered ... -
Quartz Cementation in Polycrystalline Sandstone: Insights From Phase-Field Simulations
(Journal of Geophysical Research: Solid Earth, 2020)Present work investigates the dynamics of polycrystalline quartz cement growth in sandstone using a multiphase-field model. First, the model parameters corresponding to common reservoir temperature and pressure conditions ... -
Quartzite procurement in conglomerates and deposits: Geoarchaeological characterization of potential catchment areas in the central part of the Cantabrian Region, Spain
(Geoarchaeology, 2021-01-05)Raw material characterization in Paleolithic archaeology has widened our knowledge of Middle Paleolithic societies. Procurement of raw material, specifically flint, has allowed the tracing of the mobility of both stones ... -
Radiocarbon Evidence for the Contribution of the Southern Indian Ocean to the Evolution of Atmospheric CO2 Over the Last 32,000 Years
(Paleoceanography and Paleoclimatology, 2020)It is widely assumed that the ventilation of the Southern Ocean played a crucial role in driving glacial-interglacial atmospheric CO2 levels. So far, however, ventilation records from the Indian sector of the Southern Ocean ... -
Radiometric Temperature Measurements in Nongray Ferropericlase With Pressure- Spin- and Temperature-Dependent Optical Properties
(Journal of Geophysical Research: Solid Earth, 2019)Accurate temperature determination is central to measurements of physical and chemical properties in laser-heated (LH) diamond anvil cells (DACs). Because the optical properties of samples at high pressure-temperature (P-T) ... -
Rapid eclogitisation of the Dabie–Sulu UHP terrane: Constraints from Lu–Hf garnet geochronology
(Earth and Planetary Science Letters, 2008)Rapid eclogitisation of the Dabie–Sulu UHP terrane: Constraints from Lu–Hfgarnet geochronologyAlexander Schmidta,⁎, Stefan Weyera, Klaus Mezgerb, Erik E. Schererb, Yilin Xiaoc,d,Jochen Hoefsd, Gerhard P. BreyaaInstitut für ... -
Reassessing zircon-monazite thermometry with thermodynamic modelling: insights from the Georgetown igneous complex, NE Australia
(Contributions to Mineralogy and Petrology, 2020-11-05)Accessory mineral thermometry and thermodynamic modelling are fundamental tools for constraining petrogenetic models of granite magmatism. U–Pb geochronology on zircon and monazite from S-type granites emplaced within a ... -
Recent developments in the Inorganic Crystal Structure Database: theoretical crystal structure data and related features
(Journal of Applied Crystallography, 2019-09-23)The Inorganic Crystal Structure Database (ICSD) is the world's largest database of fully evaluated and published crystal structure data, mostly obtained from experimental results. However, the purely experimental approach ... -
Recycling and Burial of Biogenic Silica in an Open Margin Oxygen Minimum Zone
(Global Biogeochemical Cycles, 2021-02-17)An extensive data set of biogenic silica (BSi) fluxes is presented for the Peruvian oxygen minimum zone (OMZ) at 11°S and 12°S. Each transect extends from the shelf to the upper slope (∼1,000 m) and dissects the permanently ... -
Relationships between spectral features, iron oxides and colours of surface soils in northern Jordan
(European Journal of Soil Science, 2020)Ground data on spectral characteristics of Jordan's soils remain sparse, which makes the interpretation of remote sensing datasets challenging. These are, however, very useful for predicting soil properties and agricultural ... -
Relativistic correction of atomic scattering factors for high-energy electron diffraction
(Acta Crystallographica Section A, 2019)Relativistic electron diffraction depends on linear and quadratic terms in the electric potential, the latter being neglected in the frequently used relativistically corrected Schrödinger equation. The quadratic electric ... -
Resolution of a bent‐crystal spectrometer for X‐ray free‐electron laser pulses: diamond versus silicon
(Acta Crystallographica Section A, 2021-05-27)The resolution function of a spectrometer based on a strongly bent single crystal (bending radius of 10 cm or less) is evaluated. It is shown that the resolution is controlled by two parameters: (i) the ratio of the lattice ... -
Restricted Oxygen‐Deficient Basins on the Northern European Epicontinental Shelf Across the Toarcian Carbon Isotope Excursion Interval
(Paleoceanography and Paleoclimatology, 2021-06-09)The worldwide recognition of the Toarcian carbon isotope excursion (T‐CIE) in organic‐rich sedimentary rocks has been linked to an oceanic anoxic event (OAE) which implies the world's deep oceans were anoxic ∼183 Ma. The ... -
Rheology of melts from the colli albani volcanic district (Italy): a case study
(Contributions to Mineralogy and Petrology, 2020-08-14)In this study the first viscosity measurements in the glass transition range of melts from highly explosive large-volume eruptions from the Colli Albani Volcanic District (CAVD) are presented. The magmas are ultrapotassic, ... -
Riparian Microtopography Affects Event‐Driven Stream DOC Concentrations and DOM Quality in a Forested Headwater Catchment
(Journal of Geophysical Research: Biogeosciences, 2022-12-21)The transport of dissolved organic carbon (DOC) from the soils to inland waters plays an important role in the global carbon cycle. Widespread increases in DOC concentrations have been observed in surface waters over the ... -
ROBL‐II at ESRF: a synchrotron toolbox for actinide research
(Journal of Synchrotron Radiation, 2020-11-23)ROBL‐II provides four different experimental stations to investigate actinide and other alpha‐ and beta‐emitting radionuclides at the new EBS storage ring of ESRF within an energy range of 3 to 35 keV. The XAFS station ... -
Robust approaches for model‐free small‐angle scattering data analysis
(Journal of Applied Crystallography, 2022-05-28)The small‐angle neutron scattering data of nanostructured magnetic samples contain information regarding their chemical and magnetic properties. Often, the first step to access characteristic magnetic and structural length ...