Geologie: Recent submissions
Now showing items 1-25 of 755
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Spontaneously Exsolved Free Gas During Major Storms as an Ephemeral Gas Source for Pockmark Formation
; ; ; ; (Geochemistry, Geophysics, Geosystems, 2022-08-12)
Abrupt fluid emissions from shallow marine sediments pose a threat to seafloor installations like wind farms and offshore cables. Quantifying such fluid emissions and linking pockmarks, the seafloor manifestations of fluid ... -
Influence of Rarely Mobile Boulders on Channel Width and Slope: Theory and Field Application
; ; ; ; (Journal of Geophysical Research: Earth Surface, 2022-09-16)
Large, rarely mobile boulders are observed globally in mountainous bedrock channels. Recent studies suggest that high concentrations of boulders could be associated with channel morphological adjustment. However, a ... -
Seasonal Landslide Activity Lags Annual Precipitation Pattern in the Pacific Northwest
; (Geophysical Research Letters, 2022-09-26)
Seasonal variations in landslide activity remain understudied compared to recent advances in landslide early warning at hourly to daily timescales. Here, we learn the seasonal pattern of monthly landslide activity in the ... -
Hillslope Sediment Supply Limits Alluvial Valley Width
; ; (AGU Advances, 2022-10-31)
River‐valley morphology preserves information on tectonic and climatic conditions that shape landscapes. Observations suggest that river discharge and valley‐wall lithology are the main controls on valley width. Yet, current ... -
Locally Resolved Stress‐State in Samples During Experimental Deformation: Insights Into the Effect of Stress on Mineral Reactions
; ; ; (Journal of Geophysical Research: Solid Earth, 2022-08-22)
Understanding conditions in the Earth's interior requires data derived from laboratory experiments. Such experiments provide important insights into the conditions under which mineral reactions take place as well as processes ... -
The Influence of Grain Size Distribution on Laboratory‐Generated Volcanic Lightning
; ; ; ; ; (Journal of Geophysical Research: Solid Earth, 2022-10-04)
Over the last decades, remote observation tools and models have been developed to improve the forecasting of ash‐rich volcanic plumes. One challenge in these forecasts is knowing the properties at the vent, including the ... -
The Interconnected Magmatic Plumbing System of the Natron Rift
; ; (Geophysical Research Letters, 2022-08-14)
Understanding the magmatic plumbing system of rift volcanoes is essential when examining the interplay between magmatic and tectonic forces. Recent seismicity, volcanic activity, magma emplacement, and volatile release ... -
Modeling Lithospheric Thickness Along the Conjugate South Atlantic Passive Margins Implies Asymmetric Rift Initiation
; ; ; ; ; (Tectonics, 2022-09-20)
The lithospheric architecture of passive margins is crucial for understanding the tectonic processes that caused the breakup of Gondwana. We highlight the evolution of the South Atlantic passive margins by a simple thermal ... -
On the Role of Rheological Memory for Convection‐Driven Plate Reorganizations
; (Geophysical Research Letters, 2022-09-21)
Understanding the temporal variability of plate tectonics is key to unraveling how mantle convection transports heat, and one critical factor for the formation and evolution of plate boundaries is rheological “memory,” ... -
Numerical Modeling of Structurally Controlled Ore Formation in Magmatic‐Hydrothermal Systems
; ; (Geochemistry, Geophysics, Geosystems, 2022-08-11)
Faults and fractures can be permeable pathways for focused fluid flow in structurally controlled ore‐forming hydrothermal systems. However, quantifying their role in fluid flow on the scale of several kilometers with ... -
Stochastic Modeling Approach to Identify Uncertainties of Karst Conduit Networks in Carbonate Aquifers
; ; ; ; (Water Resources Research, 2022-08-09)
The characterization of the karst conduit network is an essential task to understand the complex flow system within karst aquifers. However, this task is challenging and often associated with uncertainty. Equivalent porous ... -
Constraining Andean Propagation of Exhumation at the Limit of the Eastern Cordillera, NW Argentina, Using Low‐Temperature Thermochronology in a Structural Context
; ; ; ; (Tectonics, 2022-08-16)
Within the Central Andes of NW Argentina, the spatiotemporal distribution and style of deformation is strongly influenced by pre‐Cenozoic heterogeneities, mostly related to the Salta rift extension in the Cretaceous. At ... -
Scaling Laws in Aeolian Sand Transport Under Low Sand Availability
; ; (Geophysical Research Letters, 2022-05-31)
The transport of sand by wind shapes the Earth's surface and constitutes one major factor for the emission of dust aerosols. The accurate modeling of wind‐blown sand transport is thus important to achieve reliable climate ... -
From Dynamic Groundwater Level Measurements to Regional Aquifer Parameters— Assessing the Power of Spectral Analysis
; ; ; ; (Water Resources Research, 2022-05-24)
Large‐scale groundwater models are required to estimate groundwater availability and to inform water management strategies on the national scale. However, parameterization of large‐scale groundwater models covering areas ... -
Strain Signals Governed by Frictional‐Elastoplastic Interaction of the Upper Plate and Shallow Subduction Megathrust Interface Over Seismic Cycles
; ; (Tectonics, 2022-05-03)
The behavior of the shallow portion of the subduction zone, which generates the largest earthquakes and devastating tsunamis, is still insufficiently constrained. Monitoring only a fraction of a single megathrust earthquake ... -
High groundwater levels: Processes, consequences, and management
; ; ; (Wiley Interdisciplinary Reviews: Water, 2022-08-19)
In recent years, the issue of high groundwater levels has caught attention. Unfavorable consequences of high groundwater levels are especially damage to buildings, infrastructure, and the environment. Processes that lead ... -
Spatial Markov Model for the Prediction of Travel‐Time‐Based Solute Dispersion in Three‐Dimensional Heterogeneous Media
; ; (Water Resources Research, 2022-06-13)
In recent years, Spatial Markov Models have gained popularity in simulating solute transport in heterogeneous formations. They describe the transition times of particles between equidistant observation planes by statistical ... -
Holocene variability in sea‐ice conditions in the eastern Baffin Bay‐Labrador Sea – A north–south biomarker transect study
; ; ; ; ; (Boreas, 2022-02-10)
Reconstructions of sea‐surface conditions during the Holocene were achieved using three sediment cores from northeastern Baffin Bay (GeoB19948‐3 and GeoB19927‐3) and the Labrador Sea (GeoB19905‐1) along a north–south ... -
Reassessing evidence of Moon–Earth dynamics from tidal bundles at 3.2 Ga (Moodies Group, Barberton Greenstone Belt, South Africa)
; ; ; ; ; ; ; ; ; ; ; (Sedimentology, 2022-04-05)
Past orbital parameters of the Moon are difficult to reconstruct from geological records because relevant data sets of tidal strata are scarce or incomplete. The sole Archean data point is from the Moodies Group (ca 3.22 Ga) ... -
The Hidden Giant: How a rift pulse triggered a cascade of sector collapses and voluminous secondary mass‐transport events in the early evolution of Santorini
; ; ; ; ; ; (Basin Research, 2022-04-19)
Volcanic island sector collapses have the potential to trigger devastating tsunamis and volcanic eruptions that threaten coastal communities and infrastructure. Considered one of the most hazardous volcano‐tectonic regions ... -
Plate corner subduction and rapid localized exhumation: Insights from 3D coupled geodynamic and geomorphological modelling
; ; (Terra Nova, 2022-02-25)
Rapid, localized exhumation has been reported at many plate corners between adjacent subduction/collision segments. Here we use a fully‐coupled geodynamic and geomorphological modelling approach to investigate overriding ... -
Evolution of Rift Systems and Their Fault Networks in Response to Surface Processes
; ; ; ; ; (Tectonics, 2022-02-24)
Continental rifting is responsible for the generation of major sedimentary basins, both during rift inception and during the formation of rifted continental margins. Geophysical and field studies revealed that rifts feature ... -
Thickness of Fluvial Deposits Records Climate Oscillations
; ; ; ; (Journal of Geophysical Research: Solid Earth, 2022-04-08)
Fluvial deposits offer Earth’s best‐preserved geomorphic record of past climate change over geological timescales. However, quantitatively extracting this information remains challenging in part due to the complexity of ... -
An Adaptive Hybrid Vertical Equilibrium/Full‐Dimensional Model for Compositional Multiphase Flow
; ; ; ; (Water Resources Research, 2022-01-21)
Efficient compositional models are required to simulate underground gas storage in porous formations where, for example, gas quality (such as purity) and loss of gas due to dissolution are of interest. We first extend the ... -
A Combined Cosmogenic Nuclides Approach for Determining the Temperature‐Dependence of Erosion
; (Journal of Geophysical Research: Earth Surface, 2022-04-07)
Physical weathering in cold, steep bedrock hillslopes occurs at rates that are thought to depend on temperature, but our ability to quantify the temperature‐dependence of erosion remains limited when integrating over ...
