A5033506416- Methane Hydrates and Related Phenomena
- Seismic Imaging and Inversion Techniques
- earthquake and tectonic studies
- Hydrocarbon exploration and reservoir analysis
- CO2 Sequestration and Geologic Interactions
- Atmospheric and Environmental Gas Dynamics
- Geological and Geophysical Studies
- Reservoir Engineering and Simulation Methods
- Seismic Waves and Analysis
- Geological and Geophysical Studies Worldwide
- Geological Modeling and Analysis
- Geology and Paleoclimatology Research
- Geological formations and processes
- Drilling and Well Engineering
- Ocean Acidification Effects and Responses
- High-pressure geophysics and materials
- Geological Studies and Exploration
- Geological and Geochemical Analysis
- Hydraulic Fracturing and Reservoir Analysis
- Landslides and related hazards
- Enhanced Oil Recovery Techniques
- Digital Imaging for Blood Diseases
- Oil Spill Detection and Mitigation
- Offshore Engineering and Technologies
Federal Institute for Geosciences and Natural Resources
2022-2024
GEOMAR Helmholtz Centre for Ocean Research Kiel
2019-2023
GEOMAR Technologie GmbH - GTG
2020
Abstract Marine sediments host large amounts of methane (CH4), which is a potent greenhouse gas. Quantitative estimates for release from marine are scarce, and poorly constrained temporal variability leads to uncertainties in emission scenarios. Here, we use 2‐D 3‐D seismic reflection, multibeam bathymetric, geochemical, sedimentological data (I) map describe pockmarks the Witch Ground Basin (central North Sea), (II) characterize associated fluid migration structures, (III) analyze related...
Carbon capture and storage is a key mitigation strategy proposed for keeping the global temperature rise below 1.5 °C. Offshore can provide up to 13% of CO2 reduction required achieve Intergovernmental Panel on Climate Change goals. The public must be assured that potential leakages from reservoirs detected therefore safely contained. We conducted controlled release 675 kg within sediments at 120 m water depth, simulate leak test novel detection, quantification attribution approaches. show...
Evaluation of seismic reflection data has identified the presence fluid escape structures cross-cutting overburden stratigraphy within sedimentary basins globally. Seismically-imaged chimneys/pipes are considered to be possible pathways for flow, which may hydraulically connect deeper strata seabed. The properties migration through must constrained enable secure, long-term subsurface carbon dioxide (CO2) storage. We have investigated a site natural active in North Sea, Scanner pockmark...
Abstract Volcanic flank collapses, especially those in island settings, have generated some of the most voluminous mass transport deposits on Earth and can trigger devastating tsunamis. Reliable tsunami hazard assessments for collapse‐driven tsunamis require an understanding complex emplacement processes involved. The seafloor sequence southeast Montserrat (Lesser Antilles) is a key site study volcanic collapse that span subaerial to submarine environments. Here, we present new 2D 3D seismic...
In 1964, exploration drilling in the German Sector of North Sea hit a gas pocket at ∼2900 m depth below seafloor and triggered blowout, which formed 550 m-wide up to 38 deep crater now known as Figge Maar. Although craters by fluid flow are very common structures, little is about their formation dynamics. Here, we present 2D reflection seismic, sediment echosounder, multibeam echosounder data from three geoscientific surveys Maar blowout crater, used reconstruct its formation. Reflection...
Abstract Focused fluid flow shapes the evolution of marine sedimentary basins by transferring fluids and pressure across geological formations. Vertical conduits may form where localized overpressure breaches a cap rock (permeability barrier) thereby transports overpressured towards shallower reservoirs or surface. Field outcrops an Eocene system at Pobiti Kamani Beloslav Quarry ( ca 15 km west Varna, Bulgaria) reveal large carbonate‐cemented conduits, which formed in highly permeable,...
Subsurface CO2 storage is a key strategy to reduce greenhouse gas emission, but leakage of along natural fluid pathways may affect formation integrity. However, the internal structure and physical properties these focused conduits are poorly understood. Here, we present three-dimensional seismic velocity model an active conduit beneath Scanner Pockmark in Central North Sea, derived from ocean-bottom seismometer data. We show that conduit, which manifests as pipe data, separated into two...
RV MARIA S MERIAN cruise MSM 71 sailed in the Ligurian Sea from Feb 07 to 27, 2018 de-install a network of broadband ocean bottom seismometers (OBS) deployed June 2017 and acquire two refraction seismic profiles using short period OBS. The long-term comprising 30 forms an integral part European AlpArray initiative German DFG Priority Programme SPP ‚Mountain Building 4 Dimensions‘ MB 4D (http://www.spp-mountainbuilding.de/). consists stations provided by DEPAS-Pool as well institutes IPGP,...
Abstract not provided to SSRN.
Three tectonic plates meet at the Rodriguez Triple Junction in Central Indian Ocean. The are separated by Ridge (CIR), South-East (SEIR) and South-West ridge (SWIR), which all show highly different spreading behaviours. While northernmost segment of SEIR is magmatically robust, eastern tip SWIR amagmatic. CIR appears to oscillate between opening mechanisms, associated either with magmatic or magma-starved processes, can be observed over a very confined stretch crust. Even though area has...
The aim of the work is to verify hypothesis for possibility registration underwater methane emissions with a drone an RGB camera. A brief overview research in Bulgaria related gas seeps presented, focus on best-studied area shallow seeps, Zelenka, west Cape Kaliakra. covered by 1070 georeferenced images which each individual seep registered 6 consecutive captured 15 s. Four groups have 30–>100 single visible. Advantages method are quick obtaining detailed data large areas, but its...
Large volcanic debris flows associated with island flank collapses may cause devastating tsunamis as they enter the ocean. Computer simulations show that largest of these on oceanic islands such Hawaii or Canaries can ocean-wide (Lovholt et al., 2008; Waythomas 2009). However, magnitude is subject to on-going debate it depends particularly landslide transport and emplacement processes (Harbitz al. 2013). A robust understanding factors thus essential in order assess hazard collapses. Recent...
Abstract Mechanisms related to sub‐seabed fluid flow processes are complex and inadequately understood. Petrophysical properties, availability of gases, topography, stress directions, various geological parameters determine the location intensity leakage which change over time. From tens seafloor pockmarks mapped along Vestnesa Ridge on west‐Svalbard margin, only six show persistent present‐day seepage activity in sonar data. To investigate causes such restricted gas seepage, we conducted a...