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Sub‐micrometer focusing setup for high‐pressure crystallography at the Extreme Conditions beamline at PETRA III
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- Journal of Synchrotron Radiation
, 2022-04-05)
Scientific tasks aimed at decoding and characterizing complex systems and processes at high pressures set new challenges for modern X‐ray diffraction instrumentation in terms of X‐ray flux, focal spot size and sample ...
The Subducting Slab as a Chromatographic Column: Regimes of Sub‐Solidus Mass Transport as a Function of Lithospheric Hydration State, With Special Reference to the Fate of Carbonate
(
- Journal of Geophysical Research: Solid Earth
, 2022-05-31)
We investigate the chemical budget of subduction zones at sub‐solidus conditions using a thermodynamic‐numerical simulation in which all major rock components are treated as soluble and potentially mobile in aqueous fluids. ...
Precipitation and Lake Water Evaporation Recorded by Terrestrial and Aquatic n‐Alkane δ2H Isotopes in Lake Khar Nuur, Mongolia
(
- Geochemistry, Geophysics, Geosystems
, 2022-02-17)
The compound‐specific hydrogen isotopic composition (δ2H) of n‐alkanes is a valuable proxy to investigate hydrological conditions in lake sediments. While terrestrial n‐alkanes reflect the isotopic signal of the local ...
Probability Distributions of Radiocarbon in Open Linear Compartmental Systems at Steady‐State
(
- Journal of Geophysical Research: Biogeosciences
, 2022-03-24)
Radiocarbon (14C) is commonly used as a tracer of the carbon cycle to determine how fast carbon moves between different reservoirs such as plants, soils, rivers, or oceans. However such studies mostly emphasize the mean ...
Thermolab: A Thermodynamics Laboratory for Nonlinear Transport Processes in Open Systems
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- Geochemistry, Geophysics, Geosystems
, 2022-03-31)
We developed a numerical thermodynamics laboratory called “Thermolab” to study the effects of the thermodynamic behavior of nonideal solution models on reactive transport processes in open systems. The equations of the ...
Toward Reconciling Radiocarbon Production Rates With Carbon Cycle Changes of the Last 55,000 Years
(
- Paleoceanography and Paleoclimatology
, 2022-02-16)
Since it is currently not understood how changes in 14C production rate (Q), and in the carbon cycle, can be combined to explain the reconstructed atmospheric Δ14C record, we discuss possible reasons for this knowledge ...
The Effect of Land Use Classification on the Gas‐Phase and Particle Composition of the Troposphere: Tree Species Versus Forest Type Information
(
- Journal of Geophysical Research: Atmospheres
, 2022-04-08)
Relationships between vegetation and air quality are intricate and still not fully understood. For regional air quality assessments, a better understanding of the diverse feedback mechanisms is crucial. The present article ...
Secondary Minerals Drive Extreme Lithium Isotope Fractionation During Tropical Weathering
(
- Journal of Geophysical Research: Earth Surface
, 2022-02-15)
Lithium isotopes are used to trace weathering intensity, but little is known about the processes that fractionate them in highly weathered settings, where secondary minerals play a dominant role in weathering reactions. ...
H2O in omphacite of quartz and coesite eclogite from Erzgebirge and Fichtelgebirge, Germany
(
- Journal of Metamorphic Geology
, 2021-12-13)
Major and trace elements in omphacite, including hydrogen, were determined in eclogites from two Variscan basement complexes in Germany: Erzgebirge (EG) and Fichtelgebirge (FG). Erzgebirge eclogite is derived from three ...
Geochronology and petrogenesis of granitoids and associated mafic enclaves from Ghohroud in the Urumieh–Dokhtar Magmatic Arc (Iran): Evidence for magma mixing during the closure of the Neotethyan Ocean
(
- Geological Journal
, 2022-05-18)
The Ghohroud granitoids (GG), containing mafic microgranular enclaves (MMEs) are located in the central part of the Urumieh‐Dokhtar Magmatic Arc (UDMA) in central Iran. They are associated with the subduction‐related ...