Auflistung Geochemie, Mineralogie, Petrologie nach Titel
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Arctic – Atlantic Exchange of the Dissolved Micronutrients Iron, Manganese, Cobalt, Nickel, Copper and Zinc With a Focus on Fram Strait
(Global Biogeochemical Cycles, 2022-05-16)The Arctic Ocean is considered a source of micronutrients to the Nordic Seas and the North Atlantic Ocean through the gateway of Fram Strait (FS). However, there is a paucity of trace element data from across the Arctic ... -
Arsenic release from a natural rock under near-natural oxidizing conditions
(Engineering in life sciences, 2008)The solubilization of arsenic (As) from an ore material (native Arsenic [As, trig.] with Lollingite [FeAs2, rh.]) was characterized in leaching tests lasting for ≤ 99 days. The experiments were performed with materials of ... -
Assessing the Potential for Mobilization of Old Soil Carbon After Permafrost Thaw: A Synthesis of 14C Measurements From the Northern Permafrost Region
(Global Biogeochemical Cycles, 2020-09-14)The magnitude of future emissions of greenhouse gases from the northern permafrost region depends crucially on the mineralization of soil organic carbon (SOC) that has accumulated over millennia in these perennially frozen ... -
Assessing the robustness of carbonate‐associated sulfate during hydrothermal dolomitization of the Latemar platform, Italy
(Terra Nova, 2021-09-12)Carbonate‐associated sulfate (CAS) is an important proxy for reconstructing marine sulfur cycling throughout Earth's history. In order to assess the impact of carbonate neomorphism on δ34SCAS data, a mineralogical‐spatial ... -
Assessing Volcanic Controls on Miocene Climate Change
(Geophysical Research Letters, 2022-01-18)The Miocene period saw substantially warmer Earth surface temperatures than today, particularly during a period of global warming called the Mid Miocene Climatic Optimum (MMCO; ∼17–15 Ma). However, the long‐term drivers ... -
Assessment of C, N, and Si Isotopes as Tracers of Past Ocean Nutrient and Carbon Cycling
(Global Biogeochemical Cycles, 2021-07-02)Biological productivity in the ocean directly influences the partitioning of carbon between the atmosphere and ocean interior. Through this carbon cycle feedback, changing ocean productivity has long been hypothesized as ... -
Association of S-type and I-type granitoids in the Neoproterozoic Cameroon orogenic belt, Bafoussam area, West Cameroon - geology, geochemistry and petrogenesis
(Univ. Würzburg, 2005)Die Region Bafoussam im westlichen Kamerun ist Teil des "Cameroon Neoproterozoic orogenic belt" (nördlich des Kongo Kratons), welcher zum "Central African Fold Belt" (CAFB)gehört. Die Entstehung des CAFB hängt ... -
Asteroid 2008 TC3, not a polymict ureilitic but a polymict C1 chondrite parent body? Survey of 249 Almahata Sitta fragments
(Meteoritics & Planetary Science, 2022-05-14)On October 7, 2008, the asteroid 2008 TC3 exploded as it entered the Earth’s atmosphere, producing significant dust (in the atmosphere) and delivering thousands of stones in a strewn field in Sudan, collectively known as ... -
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 ... -
ATSAS 3.0: expanded functionality and new tools for small‐angle scattering data analysis
(Journal of Applied Crystallography, 2020-12-02)The ATSAS software suite encompasses a number of programs for the processing, visualization, analysis and modelling of small‐angle scattering data, with a focus on the data measured from biological macromolecules. Here, ... -
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 ... -
Authigenic Formation of Clay Minerals in the Abyssal North Pacific
(Global Biogeochemical Cycles, 2022-11-10)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 ... -
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 ... -
Beam‐induced redox chemistry in iron oxide nanoparticle dispersions at ESRF–EBS
(Journal of Synchrotron Radiation, 2023-01-13)The storage ring upgrade of the European Synchrotron Radiation Facility makes ESRF–EBS the most brilliant high‐energy fourth‐generation light source, enabling in situ studies with unprecedented time resolution. While ... -
Benthic Carbon Remineralization and Iron Cycling in Relation to Sea Ice Cover Along the Eastern Continental Shelf of the Antarctic Peninsula
(Journal of Geophysical Research: Oceans, 2022-06-28)Rapid and profound climatic and environmental changes have been predicted for the Antarctic Peninsula with so far unknown impact on the biogeochemistry of the continental shelves. In this study, we investigate benthic ... -
Bioavailable DOC: reactive nutrient ratios control heterotrophic nutrient assimilation—An experimental proof of the macronutrient-access hypothesis
(Biogeochemistry, 2021-06-08)We investigate the "macronutrient-access hypothesis", which states that the balance between stoichiometric macronutrient demand and accessible macronutrients controls nutrient assimilation by aquatic heterotrophs. Within ... -
Biogeochemical cycling of phosphorus in subsoils of temperate forest ecosystems
(Biogeochemistry, 2020-10-01)Tree roots penetrate the soil to several meters depth, but the role of subsoils for the supply of nutrient elements such as phosphorus (P) to the trees is poorly understood. Here, we tested the hypothesis that increased P ... -
Biogeochemie gelöster Kohlenhydrate in der Arktis
(Univ. Bremen, 2001) -
Blaubeuren, Cloppenburg, and Machtenstein—Three recently recognized H‐group chondrite finds in Germany with distinct terrestrial ages and weathering effects
(Meteoritics & Planetary Science, 2022-01-17)In the last 7 years, three meteorites (Blaubeuren, Cloppenburg, and Machtenstein) found in Germany were identified as chondrites. Two of these rocks had been recovered from the impact sites decades ago but were not considered ... -
Brittle Deformation of Carbonated Peridotite—Insights From Listvenites of the Samail Ophiolite (Oman Drilling Project Hole BT1B)
(Journal of Geophysical Research: Solid Earth, 2020)Hole BT1B of the Oman Drilling Project provides a continuous sampling from listvenite into the metamorphic sole that preserves the deformation, hydration, and carbonation processes of oceanic mantle peridotite at the base ...