Klaus Bauer
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View article: Dependence of Archie’s saturation exponent on hydrate saturation and hydrate morphology: a study from fluid-displacing and fracture-filling hydrate reservoirs
Dependence of Archie’s saturation exponent on hydrate saturation and hydrate morphology: a study from fluid-displacing and fracture-filling hydrate reservoirs Open
SUMMARY Accurate quantification of natural gas hydrate is essential for resource potential and climate impact assessment. Archie’s empirical equations are commonly used to quantify hydrates from electrical resistivity measurements. One dom…
View article: Seismic imaging and petrophysical classification of the Balmuccia peridotite and surrounding upper crust
Seismic imaging and petrophysical classification of the Balmuccia peridotite and surrounding upper crust Open
An interdisciplinary approach is needed to fully understand the formation and evolution of the Earth’s crust. Different disciplines (geology, geophysics, geochemistry, etc.) provide complementary information that cover different dept…
View article: Geophysical overview of the planned phase 2 drilling sites of projet DIVE in Val Sesia, Italy
Geophysical overview of the planned phase 2 drilling sites of projet DIVE in Val Sesia, Italy Open
The Drilling the Ivrea-Verbano zonE (DIVE) project focuses on the continental lower crust from petrological, geophysical, fluid and gas, as well as microbiological perspectives in the framework of ICDP expedition 5071. Two scientific boreh…
View article: 3D shear wave velocity imaging of the subsurface structure of granite rocks in the arid climate of Pan de Azúcar, Chile, revealed by Bayesian inversion of HVSR curves
3D shear wave velocity imaging of the subsurface structure of granite rocks in the arid climate of Pan de Azúcar, Chile, revealed by Bayesian inversion of HVSR curves Open
Seismic methods are emerging as efficient tools for imaging the subsurface to investigate the weathering zone. The structure of the weathering zone can be identified by differing shear wave velocities as various weathering processes will a…
View article: Fibre-optic seismic imaging at the geothermal research platform Groß Schönebeck/Germany
Fibre-optic seismic imaging at the geothermal research platform Groß Schönebeck/Germany Open
The geothermal research platform Groß Schönebeck is located ca. 50 km northeast of Berlin and was set up for the development and research of geothermal energy technology in the Northeast German Basin. The geothermal reservoir lie…
View article: New insights into seismic structures around the Tauern Window and the Periadriatic Fault System from reprocessing of TRANSALP seismic reflection data
New insights into seismic structures around the Tauern Window and the Periadriatic Fault System from reprocessing of TRANSALP seismic reflection data Open
The TRANSALP project carried out around the Millenium provided unique geophysical sections across the orogenic structure in the Eastern Alps. Active and passive seismic experiments were conducted along a 300 km long profile between Munich …
View article: Comment on egusphere-2023-1813
Comment on egusphere-2023-1813 Open
Abstract. Seismic methods are emerging as efficient tools for imaging the subsurface to investigate the weathering zone. The structure of the weathering zone can be identified by differing shear wave velocities as various weathering proces…
View article: Fracture characterisation using 3-D seismic reflection data for advanced deep geothermal exploration in the NE German Basin
Fracture characterisation using 3-D seismic reflection data for advanced deep geothermal exploration in the NE German Basin Open
At the geothermal research platform Gross Schönebeck (NE German Basin), we analysed 3-D seismic reflection data to determine the degree and direction of azimuthal velocity anisotropy which is interpreted as the effect of sub-vertical fract…
View article: Neural network based classification of rock properties and seismic vulnerability
Neural network based classification of rock properties and seismic vulnerability Open
BACKGROUND AND OBJECTIVES: Soil or rock types in a region are often interpreted qualitatively by visually comparing various geophysical properties such as seismic wave velocity and vulnerability, as well as gravity data. Better insight and…
View article: 3D shear wave velocity imaging of the subsurface structure of granite rocks in the arid climate of Pan de Azúcar, Chile, revealed by Bayesian inversion of HVSR curves
3D shear wave velocity imaging of the subsurface structure of granite rocks in the arid climate of Pan de Azúcar, Chile, revealed by Bayesian inversion of HVSR curves Open
Seismic methods are emerging as efficient tools for imaging the subsurface to investigate the weathering zone. The structure of the weathering zone can be identified by differing shear wave velocities as various weathering processes will a…
View article: 3-D imaging of the Balmuccia peridotite body (Ivrea–Verbano zone, NW-Italy) using controlled source seismic data
3-D imaging of the Balmuccia peridotite body (Ivrea–Verbano zone, NW-Italy) using controlled source seismic data Open
SUMMARY We provide new results from a controlled-source seismic experiment on the deepest part of the Val Sesia crust–mantle section of the Ivrea–Verbano zone (IVZ) in the Italian Alps. The IVZ is a tilted, almost complete section through …
View article: Ice sheet induced salt tectonics – the example of surface cracks in northern Germany
Ice sheet induced salt tectonics – the example of surface cracks in northern Germany Open
The underground of the northern German lowlands, located in the Central European Basin System (CEBS), is characterized by numerous Permian Zechstein salt structures, which are found at depths of up to more than 2000m. The lowlands were tra…
View article: Combined seismic and borehole investigation of the deep granite weathering structure—Santa Gracia Reserve case in Chile
Combined seismic and borehole investigation of the deep granite weathering structure—Santa Gracia Reserve case in Chile Open
Imaging the critical zone at depth, where intact bedrock transforms into regolith, is critical in understanding the interaction between geological and biological processes. We acquired a 500 m‐long near‐surface seismic profile to investiga…
View article: From pilot site knowledge via integrated reservoir characterization to utilization perspectives of a deep geothermal reservoir: 3D geological model at the research platform Groß Schönebeck in the Northeast German Basin
From pilot site knowledge via integrated reservoir characterization to utilization perspectives of a deep geothermal reservoir: 3D geological model at the research platform Groß Schönebeck in the Northeast German Basin Open
The Groß Schönebeck site in the North German Basin serves as research platform for studying the geothermal potential of deeply buried Permian reservoir rocks and the technical feasibility to extract their geothermal heat. The structural se…
View article: SEismic imaging of the Ivrea ZonE (project SEIZE) reveals the 3D structure of the Ivrea body near Balmuccia, Italy
SEismic imaging of the Ivrea ZonE (project SEIZE) reveals the 3D structure of the Ivrea body near Balmuccia, Italy Open
<p>The Ivrea-Verbano Zone (IVZ) located in the Italian Alps is known as one of most complete archetypes of continental crust&#8211;upper mantle section on Earth (e.g. Pistone et al., 2017). Because of its accessibility at the sur…
View article: Integrated seismic and borehole investigation of the deep weathering structure &#8211; case study of Santa Gracia Reserve, Chile
Integrated seismic and borehole investigation of the deep weathering structure – case study of Santa Gracia Reserve, Chile Open
<p>Subsurface imaging of the critical zone, where are regolith is produced from bedrock, plays a significant role in understanding the geological and biological interaction at depths. The depth where we can find the intact bedrock is…
View article: Surface cracks—geomorphological indicators for late Quaternary halotectonic movements in Northern Germany
Surface cracks—geomorphological indicators for late Quaternary halotectonic movements in Northern Germany Open
Loading and unloading effects of the Scandinavian Ice Sheet triggered halotectonic movements in Northern Germany. We present newly detected geomorphological features—termed surface cracks—which indicate a relation between ice sheet‐induced…
View article: Cable reverberations during wireline distributed acoustic sensing measurements: their nature and methods for elimination
Cable reverberations during wireline distributed acoustic sensing measurements: their nature and methods for elimination Open
The application of distributed acoustic sensing in borehole measurements allows for the use of fibre optic cables to measure strain. This is more efficient in terms of time and costs compared with the deploying of conventional borehole sei…
View article: Wavelet transform‐based seismic facies classification and modelling: application to a geothermal target horizon in the NE German Basin
Wavelet transform‐based seismic facies classification and modelling: application to a geothermal target horizon in the NE German Basin Open
At the geothermal test site near Groß Schönebeck (NE German Basin), a new 3D seismic reflection survey was conducted to study geothermal target layers at around 4 km depth and 150°C. We present a workflow for seismic facies classification …
View article: 3-D seismic exploration across the deep geothermal research platform Groß Schönebeck north of Berlin/Germany
3-D seismic exploration across the deep geothermal research platform Groß Schönebeck north of Berlin/Germany Open
The North German Basin is one of the three major type localities in Germany for deep geothermal energy. Here, the pore space is the dominant parameter, in contrast to fractures (Rhine Graben) and karst (Molasse Basin). To further develop t…
View article: A Review of the Hydrochemistry of a Deep Sedimentary Aquifer and Its Consequences for Geothermal Operation: Klaipeda, Lithuania
A Review of the Hydrochemistry of a Deep Sedimentary Aquifer and Its Consequences for Geothermal Operation: Klaipeda, Lithuania Open
The Klaipeda Geothermal Demonstration Plant (KGDP), Lithuania, exploits a hypersaline sodium-chloride (salinity c. 90 g/L) groundwater from a 1100 m deep Devonian sandstone/siltstone reservoir. The hydrogen and oxygen stable isotope compos…
View article: AIC-based diffraction stacking for local earthquake locations at the Sumatran Fault (Indonesia)
AIC-based diffraction stacking for local earthquake locations at the Sumatran Fault (Indonesia) Open
We present a new workflow for the localization of seismic events which is based on a diffraction stacking approach. In order to address the effects from complex source radiation patterns, we suggest to compute diffraction stacking from a c…
View article: Reexamination of the subsurface fault structure in the vicinity of the 1989 moment-magnitude-6.9 Loma Prieta earthquake, central California, using steep-reflection, earthquake, and magnetic data
Reexamination of the subsurface fault structure in the vicinity of the 1989 moment-magnitude-6.9 Loma Prieta earthquake, central California, using steep-reflection, earthquake, and magnetic data Open
First posted June 13, 2018 For additional information, contact: Contact Information, Menlo Park, Calif. Office—Earthquake Science Center U.S. Geological Survey 345 Middlefield Road, MS 977 Menlo Park, CA 94025 https://earthquake.usgs.gov/ …