A5079809665- Geological and Geochemical Analysis
- earthquake and tectonic studies
- Geochemistry and Geologic Mapping
- Drilling and Well Engineering
- High-pressure geophysics and materials
- Geology and Paleoclimatology Research
- Reservoir Engineering and Simulation Methods
- Methane Hydrates and Related Phenomena
- Seismic Imaging and Inversion Techniques
- Force Microscopy Techniques and Applications
- Metallic Glasses and Amorphous Alloys
- Metal and Thin Film Mechanics
- Hydrocarbon exploration and reservoir analysis
- Material Dynamics and Properties
- CO2 Sequestration and Geologic Interactions
- Geological and Geophysical Studies Worldwide
- Seismology and Earthquake Studies
- Hydraulic Fracturing and Reservoir Analysis
- Mechanical and Optical Resonators
- Seismic Waves and Analysis
- Phase-change materials and chalcogenides
- Geothermal Energy Systems and Applications
- Geophysical and Geoelectrical Methods
- Marine and environmental studies
- Cryospheric studies and observations
GFZ Helmholtz Centre for Geosciences
2007-2024
Luleå University of Technology
2021
Japan External Trade Organization
2017
Los Alamos National Laboratory
2002-2004
Technische Universität Braunschweig
1999-2002
Industrial Union of Metalworkers
1996
Technische Universität Berlin
1987-1995
University of Göttingen
1968
The German Continental Deep Drilling Program (KTB) drilled two holes through crystalline rocks which are rich in both high‐salinity fluids and graphite accumulated along shear zones. Analyses of a large number borehole measurements yield models for the electrical resistivity upper middle crust vicinity KTB holes. High observed resistivity, more than 10 5 Ω m lowermost part 9000 deep main hole, rather “wet” crust, indicates that effective mechanisms exist to cut down connections between fluid...
Whole-rock Rb-Sr studies on six suites of highly metamorphosed basement rocks from southern Egypt and northern Sudan, west the River Nile, yield Pan-African ages (562–918 Ma): these are interpreted as reset. Orthogneisses give Nd model 1600 to 2600 Ma for their calc-alkaline plutonic precursors. A gneiss derived sedimentary precursors gave a mean crustal residence age 2200 Ma. series I-type, late-tectonic, granitoids were intruded during period uplift, erosion, wrench faulting at 560–620...
We have measured the density of Pd40Ni40−xCuxP20 (x=0–40) alloys in amorphous and crystalline states. For x>30, are denser than states, which is contrary to behavior all known metallic glasses. other bulk glasses where data available both we find a correlation between stability supercooled liquids difference molar volumes glassy phases. The liquid region largest for those that show no change volume upon crystallization.
ABSTRACT Mafic–ultramafic sequences in the Jebel Rahib fold‐and‐thrust belt of NW Sudan comprise metamorphosed equivalents obducted oceanic lithosphere. Primary features like pillow‐structures, quenchtextures, igneous layering and primary minerals chromian spinels pyroxenes are partly preserved. Geochemical investigations confirm field evidence reveal occurrence harzburgites, ophiolitic chromites, gabbros, gabbroic cumulates basalts primitive tholeiitic compositions resembling transitional...
Abstract The modern, over 250-m-deep basin of Lake Constance represents the underfilled northern part an 400-m-deep, glacially overdeepened trough, which reaches well into Alps at its southern end. overdeepening was formed by repeated glacial advance-retreat cycles Rhine Glacier throughout Middle to Late Pleistocene. A seismic survey revealed a Quaternary sediment fill more than 150 m thickness representing least last cycle. stratified sedimentary consists base ice-contact deposits on top...
We present an apparatus that permits quasisimultaneous measurements of several vibrating modes in a reed experiment. Position detection by laser beam deflection offers simple setup and good sensitivity for higher flexural as well torsional vibrations. Frequency damping from free decay data are determined software which high accuracy, especially at low damping. This is particularly interesting the measurement mechanical properties thin films deposited on reed. As example results Al film...
Abstract. In January 2020, a scientific borehole planning workshop sponsored by the International Continental Scientific Drilling Program was convened at Cornell University in northeastern United States. is to drill test wells evaluate potential use geothermal heat from depths range of 2700–4500 m and rock temperatures about 60 120 ∘C its campus buildings. encourages Earth sciences community envision how these boreholes can also be used advance high-priority subsurface research questions....
We use Rayleigh waves and a Kelvin probe to measure the elastic modulus work function of thin polycrystalline metallic films prepared by electron beam evaporation. A high-resolution in situ measurement Rayleigh-wave velocities enables us determine topmost layer film (while it is being grown). Using this technique, we can at interfaces between Ir, Pd, Pt, Ag, Au. For many metal-pair combinations (e.g., or Ir on Pd), each film's equals that bulk from onset deposition. However, first couple...
Abstract. Imaging spectroscopy is increasingly used for surface mapping. Therefore different expert systems are being utilized to identify cover materials. Those mainly rely on the spectral comparison between unknown and library spectra, but their performances were only limited qualified. This study aims comparative analysis of drill core samples from recently discovered maar system in Czech Republic. Drill surrounding area Mýtina analyzed by X-Ray diffraction (XRD) hyperspectral...
Abstract— Impact structures in the solar system are mainly recognized and explored through remote sensing and, on Earth, geophysical deep sounding. To date, a continuous scientific sampling of large impact craters from cover rocks to target material has only seldom been performed. The first project deep‐drill core into one largest well‐preserved terrestrial was executed winter 2001/2002 65 Myr‐old Chicxulub crater Mexico using integrated coring situ measurements. combined use different...
Abstract. The record of past environmental conditions and changes archived in lacustrine sediments serves as an important element paleoenvironmental climate research. A main barrier accessing these archives is the undisturbed recovery long cores from deep lakes. In this study, we have developed tested a new, environmentally friendly coring tool modular barge, centered around down-the-hole hydraulic hammering advanced piston system, called Hipercorig. Test beds for evaluation performance...