Auflistung Geochemie, Mineralogie, Petrologie nach Titel
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Cadmium Background Levels in Groundwater in an Area Dominated by Agriculture
(Integrated Environmental Assessment and Management, 2019)Cadmium is a highly toxic trace metal, which can be of geogenic or anthropogenic origin, for example, minerals, phosphate fertilizers, and combustion emissions. Due to its low sorption affinity compared to other heavy ... -
Calc-alkaline volcanic rocks and zircon ages of the late Tonian: early Cryogenian arc-related Big Naryn Complex in the Eastern Djetim-Too Range, Middle Tianshan block, Kyrgyzstan
(International Journal of Earth Sciences, 2020-11-24)The Big Naryn Complex (BNC) in the East Djetim-Too Range of the Kyrgyz Middle Tianshan block is a tectonized, at least 2 km thick sequence of predominantly felsic to intermediate volcanic rocks intruded by porphyric rhyolite ... -
Capturing the structural and compositional variability of Opalinus Clay: constraints from multidisciplinary investigations of Mont Terri drill cores (Switzerland)
(Environmental Earth Sciences, 2021-06-02)Opalinus Clay is considered a potential host rock for radioactive waste disposal. The Jurassic claystone formation is composed of several facies and subfacies types, which are characterized by varying amounts of quartz, ... -
Carbon release and transformation from coastal peat deposits controlled by submarine groundwater discharge: a column experiment study
(Limnology and Oceanography, 2020)Abstract Although the majority of coastal sediments consist of sandy material, in some areas marine ingression caused the submergence of terrestrial carbon-rich peat soils. This affects the coastal carbon balance, as peat ... -
Carbonates from the ancient world's longest aqueduct: A testament of Byzantine water management
(Geoarchaeology, 2021-05-06)The fourth‐ and fifth‐century aqueduct system of Constantinople is, at 426 km, the longest water supply line of the ancient world. Carbonate deposits in the aqueduct system provide an archive of both archaeological ... -
Cation distribution in Cu2ZnSnSe4, Cu2FeSnS4 and Cu2ZnSiSe4 by multiple‐edge anomalous diffraction
(Acta Crystallographica Section B, 2020-12-07)Multiple‐Edge Anomalous Diffraction (MEAD) has been applied to various quaternary sulfosalts belonging to the adamantine compound family in order to validate the distribution of copper, zinc and iron cations in the structure. ... -
Central Mediterranean tephrochronology between 313 and 366 ka: New insights from the Fucino palaeolake sediment succession
(Boreas, 2022-12-09)Thirty‐two tephra layers were identified in the time‐interval 313–366 ka (Marine Isotope Stages 9–10) of the Quaternary lacustrine succession of the Fucino Basin, central Italy. Twenty‐seven of these tephra layers yielded ... -
Changes in the Dust-Influenced Biological Carbon Pump in the Canary Current System: Implications From a Coastal and an Offshore Sediment Trap Record Off Cape Blanc, Mauritania
(Global Biogeochemical Cycles, 2019)Long-term data characterizing the oceans' biological carbon pump are essential for understanding impacts of climate variability on marine ecosystems. The “Bakun upwelling intensification hypothesis” suggests intensified ... -
Characterisation of an artesian groundwater system in the Valle de Iglesia in the Central Andes of Argentina
(International Journal of Earth Sciences, 2021-06-04)Despite its location in the “Arid Diagonal” of South America, the Valle de Iglesia contains a number of artesian springs, the most important of which are the Baños Pismanta thermal springs, which release water at ~ 45 °C. ... -
Characterizing As, Cu, Fe and U solubilization by natural waters
(Springer-Verlag, Berlin/HeidelbergSpringer, Berlin/Heidelberg2008)The effects of carbonate concentration and the presence of in-situ generated iron oxide and hydroxide phases (iron oxyhydroxides) on arsenic (As), copper (Cu), and uranium (U) release from natural rocks were investigated ... -
Chemical Evolution of the Exceptional Arctic Stratospheric Winter 2019/2020 Compared to Previous Arctic and Antarctic Winters
(Journal of Geophysical Research: Atmospheres, 2021-09-21)The winter 2019/2020 showed the lowest ozone mixing ratios ever observed in the Arctic winter stratosphere. It was the coldest Arctic stratospheric winter on record and was characterized by an unusually strong and long‐lasting ... -
Chemical Geodynamics Insights From a Machine Learning Approach
(Geochemistry, Geophysics, Geosystems, 2022-10-19)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 ... -
Chemical Weathering of Loess and Its Contribution to Global Alkalinity Fluxes to the Coastal Zone During the Last Glacial Maximum, Mid-Holocene, and Present
(Geochemistry, Geophysics, Geosystems, 2020)Loess sediments are windblown silt deposits with, in general, a carbonate grain content of up to 30%. While regionally, loess was reported to increase weathering fluxes substantially, the influence on global weathering ... -
Classification of CM chondrite breccias—Implications for the evaluation of samples from the OSIRIS-REx and Hayabusa 2 missions
(Meteoritics & Planetary Science, 2020)CM chondrites are complex impact (mostly regolith) breccias, in which lithic clasts show various degrees of aqueous alteration. Here, we investigated the degree of alteration of individual clasts within 19 different CM ... -
Clay fraction properties and grassland management imprint on soil organic matter composition and stability at molecular level
(Soil Use and Management, 2022-05-07)The dynamics of soil carbon in grassland are partly determined by soil organic matter (SOM) composition. However, it remains unclear which role grassland management plays in the interplay between SOM composition and carbon ... -
Clay mineral formation in Permian rocks of a geothermal borehole at Northern Upper Rhine Graben, Germany
(International Journal of Earth Sciences, 2021-03-27)Hydrothermally altered rhyolite rocks in the Permian Donnersberg Formation of a geothermal borehole in the Northern Upper Rhine Graben (Germany) were investigated to find out answers for the low hydraulic conductivity of ... -
Collisional mixing between inner and outer solar system planetesimals inferred from the Nedagolla iron meteorite
(Meteoritics & Planetary Science, 2021-10-18)The ungrouped iron meteorite Nedagolla is the first meteorite with bulk Mo, Ru, and Ni isotopic compositions that are intermediate between those of the noncarbonaceous (NC) and carbonaceous (CC) meteorite reservoirs. The ... -
Combined X-ray and neutron single-crystal diffraction in diamond anvil cells
(Journal of Applied Crystallography, 2019)It is shown that it is possible to perform combined X-ray and neutron single-crystal studies in the same diamond anvil cell (DAC). A modified Merrill–Bassett DAC equipped with an inflatable membrane filled with He gas has ... -
Combining reverse Monte Carlo analysis of X‐ray scattering and extended X‐ray absorption fine structure spectra of very small nanoparticles
(Journal of Applied Crystallography, 2022-12-23)Finite size effects in partial pair distribution functions generate artefacts in the scattering structure factor and scattering intensity. It is shown how they can be overcome using a binned version of the Debye scattering ... -
Comments on "Comparison of reductive dechlorination of p-chlorophenol using Fe0 and nanosized Fe0 by R. Cheng, et al. [J. Hazard. Mater. 144 (2007) 334]
(Journal of hazardous materials, 2007)