Search Results - "VON BLANCKENBURG, Friedhelm"

Modes of planetary-scale Fe isotope fractionation by Schoenberg, Ronny, Blanckenburg, Friedhelm von

“…A comprehensive set of high-precision Fe isotope data for the principle meteorite types and silicate reservoirs of the Earth is used to investigate iron…”
Get full text

Quantifying nutrient uptake as driver of rock weathering in forest ecosystems by magnesium stable isotopes by Uhlig, David, Schuessler, Jan A, Bouchez, Julien, Dixon, Jean L, von Blanckenburg, Friedhelm

“…Plants and soil microbiota play an active role in rock weathering and potentially couple weathering at depth with erosion at the soil surface. The nature of…”
Get full text

The Iron Stable Isotope Fingerprint of the Human Diet by von Blanckenburg, Friedhelm, Noordmann, Janine, Guelke-Stelling, Monika

“…The stable isotopes of iron disclose the metabolic pathways of iron within the human food chain. We have measured with precise multicollector ICP-MS the iron…”
Get full text

Deep weathering in the semi-arid Coastal Cordillera, Chile by Krone, Laura V., Hampl, Ferdinand J., Schwerdhelm, Christopher, Bryce, Casey, Ganzert, Lars, Kitte, Axel, Übernickel, Kirstin, Dielforder, Armin, Aldaz, Santiago, Oses-Pedraza, Rómulo, Perez, Jeffrey Paulo H., Sanchez-Alfaro, Pablo, Wagner, Dirk, Weckmann, Ute, von Blanckenburg, Friedhelm

“…The weathering front is the boundary beneath Earth’s surface where pristine rock is converted into weathered rock. It is the base of the “critical zone”, in…”
Get full text

Natural Iron Isotope Variations in Human Blood by Walczyk, Thomas, von Blanckenburg, Friedhelm

“…Isotopic analysis of human blood and liver and muscle tissue indicates that each individual bears a long-term iron (Fe) isotope signature in the blood. Blood…”
Get full text

Long-term stability of global erosion rates and weathering during late-Cenozoic cooling by von Blanckenburg, Friedhelm, Willenbring, Jane K

“…Over geologic timescales, CO2 is emitted from the Earth’s interior and is removed from the atmosphere by silicate rock weathering and organic carbon burial…”
Get full text

The control mechanisms of erosion and weathering at basin scale from cosmogenic nuclides in river sediment by von Blanckenburg, Friedhelm

“…The study of a sample of river sediment enables the determination of spatially averaged denudation rates that provide an exceptional perspective on erosion and…”
Get full text

Meteoric cosmogenic Beryllium-10 adsorbed to river sediment and soil: Applications for Earth-surface dynamics by Willenbring, Jane K., von Blanckenburg, Friedhelm

“…Rainfall scavenges meteoric cosmogenic 10Be from the atmosphere. 10Be falls to the Earth's surface, where it binds tightly to sediment particles in non-acidic…”
Get full text

How Slow Rock Weathering Balances Nutrient Loss During Fast Forest Floor Turnover in Montane, Temperate Forest Ecosystems by Uhlig, David, von Blanckenburg, Friedhelm

“…Mineral nutrient cycling between trees and the forest floor is key to forest ecosystem nutrition. However, in sloping, well-drained landscapes the forest floor…”
Get full text

Do degree and rate of silicate weathering depend on plant productivity? by Oeser, Ralf A, von Blanckenburg, Friedhelm

“…Plants and their associated below-ground microbiota possess the tools for rock weathering. Yet the quantitative evaluation of the impact of these biogenic…”
Get full text

Precipitation Control on Weathering Intensity and Depositional Flux of Meteoric 10Be Revealed From Soil Profiles Along a Climate Gradient (Chile) by Krone, Laura V., Wittmann, Hella, Blanckenburg, Friedhelm

“…Along a climate gradient in the Chilean coastal mountains, we investigated denudation rates using the meteoric cosmogenic nuclide 10Be and its ratio to stable…”
Get full text

Late Neoproterozoic seawater oxygenation by siliceous sponges by Tatzel, Michael, von Blanckenburg, Friedhelm, Oelze, Marcus, Bouchez, Julien, Hippler, Dorothee

“…The Cambrian explosion, the rapid appearance of most animal phyla in the geological record, occurred concurrently with bottom seawater oxygenation. Whether…”
Get full text

Systematic changes in serpentine Si isotope signatures across the Mariana forearc – a new proxy for slab dehydration processes by Geilert, Sonja, Albers, Elmar, Frick, Daniel A., Hansen, Christian T., von Blanckenburg, Friedhelm

“…•δ30Si was measured with micrometer resolution in mantle wedge serpentinites.•Serpentine δ30Si varies depending on w/r ratios and δ30Si of interacting…”
Get full text

The effect of Al on Si isotope fractionation investigated by silica precipitation experiments by Oelze, Marcus, von Blanckenburg, Friedhelm, Bouchez, Julien, Hoellen, Daniel, Dietzel, Martin

“…Mass-dependent isotope fractionation occurring during precipitation of solids in low-temperature environments often depends on precipitation rate. Using a…”
Get full text

The circular nutrient economy of terrestrial ecosystems and the consequences for rock weathering by Maher, Kate, von Blanckenburg, Friedhelm

“…Earth’s biosphere is thought to exert a substantial influence on regolith evolution and chemical weathering rates. However, ecosystems are also highly…”
Get full text

The silicon isotope record of early silica diagenesis by Tatzel, Michael, von Blanckenburg, Friedhelm, Oelze, Marcus, Schuessler, Jan A., Bohrmann, Gerhard

“…The heavy isotopes of silicon are strongly enriched in some of the youngest, early diagenetically formed porcellanite layers from the Southwest Indian Ridge…”
Get full text

Investigation on elemental and isotopic fractionation during 196 nm femtosecond laser ablation multiple collector inductively coupled plasma mass spectrometry by Horn, Ingo, von Blanckenburg, Friedhelm

“…Despite the large number of successful applications of laser ablation, elemental and isotopic fractionation coupled to inductively coupled plasma mass…”
Get full text

Slow advance of the weathering front during deep, supply-limited saprolite formation in the tropical Highlands of Sri Lanka by Hewawasam, Tilak, von Blanckenburg, Friedhelm, Bouchez, Julien, Dixon, Jean L., Schuessler, Jan A., Maekeler, Ricarda

“…Silicate weathering – initiated by major mineralogical transformations at the base of ten meters of clay-rich saprolite – generates the exceptionally low…”
Get full text

Fractionation of Stable Iron Isotopes in Higher Plants by Guelke, Monika, von Blanckenburg, Friedhelm

“…Although the fractionation of stable iron isotopes by biological processes in the environment is currently a matter of intense debate, the isotope…”
Get full text

Silicon uptake and isotope fractionation dynamics by crop species by Frick, Daniel A, Remus, Rainer, Sommer, Michael, Augustin, Jürgen, Kaczorek, Danuta, von Blanckenburg, Friedhelm

“…That silicon is an important element in global biogeochemical cycles is widely recognised. Recently, its relevance for global crop production has gained…”
Get full text