A5031936023- Geological formations and processes
- Geological and Geophysical Studies
- Geological Studies and Exploration
- Geological and Geochemical Analysis
- earthquake and tectonic studies
- Hydrocarbon exploration and reservoir analysis
- Methane Hydrates and Related Phenomena
- Landslides and related hazards
- Geology and Paleoclimatology Research
- Geological and Geophysical Studies Worldwide
- Seismic Imaging and Inversion Techniques
- Geochemistry and Geologic Mapping
- Paleontology and Stratigraphy of Fossils
- High-pressure geophysics and materials
- Hydraulic Fracturing and Reservoir Analysis
- Geological Modeling and Analysis
- graph theory and CDMA systems
- Finite Group Theory Research
- Geological and Tectonic Studies in Latin America
- Chronic Myeloid Leukemia Treatments
- Cryospheric studies and observations
- Geophysics and Gravity Measurements
Friedrich-Alexander-Universität Erlangen-Nürnberg
2020-2024
University of Bergen
2020-2021
Johannes Gutenberg University Mainz
1985-2017
University of Münster
2011-2013
Diagenetic processes alter petrophysical properties, such as porosity and permeability, of clastic sediments. An understanding these is therefore pivotal for any reservoir quality assessments. Thermal exposure among the crucial factors influencing diagenesis can vary significantly in widespread formations, e.g. due to regional variations burial history. Especially quartz overgrowth controlled by temperature we here demonstrate effect spatial thermal variability on degree cementation. Our...
Rifting has occurred worldwide along preexisting mobile belts, which are therefore thought to control rift orientation on a large scale. On smaller scale, shear zones within belts reactivated as faults. In NW Namibia, of the Neoproterozoic Kaoko Belt run subparallel present-day continental passive margin and inferred have been during opening South Atlantic Ocean. However, extent this reactivation influence rifting largely unknown. A combined remote sensing field study was conducted quantify...
In 1861, one of the most destructive earthquakes in history Argentina destroyed city Mendoza (currently 1 million inhabitants). The magnitude M S∼7.0 earthquake is inferred to have occurred on 31‐km‐long La Cal thrust fault, which extends from north, where it offsets an alluvial fan and small inset terraces along a well‐preserved fault scarp. A trench excavated terrace that vertically offset by ∼2.5 m exposes two main stratigraphic units separated erosional unconformity. coarse‐grained...
Well constrained numerical ages of alluvial fan sediments are key to understanding the chronology episodes and tectonic activity at front Andean Precordillera. We tested application radiocarbon optically stimulated luminescence (OSL) dating in distal part an five kilometers north Mendoza. For OSL a large number aliquots (n > 70) — each composed ∼50 quartz grains were measured order obtain reliable burial despite scattered dose distributions. Owing feldspar contamination all samples,...
Abstract. In marine rift basins, deep-water clastics (>200 m) in the hanging wall of rift- or basin-bounding fault systems are commonly juxtaposed against crystalline “basement” rocks footwall. A distinct feature such is therefore juxtaposition relatively highly permeable, unconsolidated sediments low-permeable basement rocks. Due to limited surface exposure zones, studies elucidating their structure and evolution rare. Consequently, impact on fluid circulation diagenesis within proximal...
Faults commonly form loci for high fluid flux in sedimentary basins, where fluids, rocks and deformation processes frequently interact. Here, we elucidate the interaction of flow, diagenesis near basin-bounding faults basins through a study vicinity (0–3.5 km) Dombjerg Fault NE Greenland rift system. Due to fault-controlled circulation, fault-proximal syn-rift clastics underwent pervasive calcite cementation, whereas uncemented at some distance from fault remained highly porous friable....
In porous sandstone, fluids are guided by major features such as faults or lithologic discontinuities. At the local scale, deformation bands common structures to baffle fluid flow in rock. Potential flow-hindering less frequently reported of veins sandstone (Skurtveit et al., 2015, a rare case), which may root circumstance that they do not appear very often and/or have simply been overlooked.  We here present case where calcite formed highly (up 25 % porosity) and partially poorly...
Aeolian sandstones are capable of forming excellent reservoir rock due to their textural and compositional maturity. Often spanning across large areas, such formations may however experience spatial variability in burial temperature exposure potentially leading a heterogeneous diagenesis subsequent quality. To assess potential variability, this case study focusses on the aeolian units Lower Jurassic Etjo Formation Namibia, exposed at three key localities lying >100 km apart from each other....
Abstract The Eastern California shear zone (USA) is a broad of transtensional deformation related to the relative motion between Pacific and North American plates. Due its active seismicity, receives great attention, with specific focus on slip rates major faults. To contribute better understanding long-term strain accumulation in this zone, study quantifies E–W-directed extensional rate based analysis N–S-trending normal fault scarps 765-k.y.-old Bishop tuff (Volcanic Tableland). average...
It is well known that every local formation of finite soluble groups possesses three distinguished definitions consisting groups: the minimal one, full and integrated maximal one. As far as first second these are concerned, this statement remains true in context arbitrary groups. Doerk, Šemetkov, Schmid have posed problem whether has a (that is, unique) definition. In paper description formations with unique definition given, from which counter-examples emerge. Furthermore, criterion for...