A5065561806- earthquake and tectonic studies
- Seismic Imaging and Inversion Techniques
- High-pressure geophysics and materials
- Geological and Geochemical Analysis
- Methane Hydrates and Related Phenomena
- Seismic Waves and Analysis
- Geological and Geophysical Studies
- Geological and Geophysical Studies Worldwide
- Geological Studies and Exploration
- Hydrocarbon exploration and reservoir analysis
- Reservoir Engineering and Simulation Methods
- Underwater Acoustics Research
- Seismology and Earthquake Studies
- Geological Formations and Processes Exploration
- Geological and Tectonic Studies in Latin America
- Geophysics and Sensor Technology
- Atmospheric and Environmental Gas Dynamics
- Marine and environmental studies
- Geological Modeling and Analysis
- Hydraulic Fracturing and Reservoir Analysis
- Geological formations and processes
- Maritime and Coastal Archaeology
- Earthquake Detection and Analysis
- Landslides and related hazards
- Advances in Oncology and Radiotherapy
GEOMAR Helmholtz Centre for Ocean Research Kiel
2016-2025
Clinical Research Center Kiel
2024
GEOMAR Technologie GmbH - GTG
2017-2021
Kiel University
2019
Deep-sea mineral deposits potentially represent vast metal resources that could make a major contribution to future global raw material supply. Increasing demand for these metals, many of which are required enable low-carbon and high-technology society relieve pressure on land-based resources, may result in deep sea mining within the next decade. Seafloor massive sulphide (SMS) deposits, containing abundant copper, zinc, gold silver, have been subject recent ongoing commercial interest....
Abstract The depth of earthquakes along mid-ocean ridges is restricted by the relatively thin brittle lithosphere that overlies a hot, upwelling mantle. With decreasing spreading rate, may occur deeper in lithosphere, accommodating strain within thicker layer. New data from ultraslow-spreading Mid-Cayman Spreading Center (MCSC) Caribbean Sea illustrate to 10 km below seafloor and, hence, than most other slow-spreading ridges. MCSC spreads at 15 mm/yr full while similarly well-studied...
Abstract The nature of incoming sediments is a key controlling factor for the occurrence megathrust earthquakes in subduction zones. In 2011 Mw 9 Tohoku earthquake (offshore Japan), smectite-rich clay minerals transported by subducting oceanic plate played critical role development giant interplate coseismic slip near trench. Recently, we conducted intensive controlled-source seismic surveys at northwestern part Pacific to investigate plate. Our reflection data reveal that thickness sediment...
Research Article| July 26, 2017 Magmatic-tectonic conditions for hydrothermal venting on an ultraslow-spread oceanic core complex Jennifer L. Harding; Harding 1Institute Geophysics, Jackson School of Geosciences, University Texas at Austin, J.J. Pickle Campus, 10100 Burnet Road, Building 196, 78758, USA Search other works by this author on: GSW Google Scholar Harm J.A. Van Avendonk; Avendonk Nicholas W. Hayman; Hayman Ingo Grevemeyer; Grevemeyer 2GEOMAR Helmholtz Centre Ocean Research,...
Abstract The Chilean margin is one of the Earth's tectonically most active plate boundaries, and yet, some its segments are still underexplored. Here, we present amphibious data from Copiapó region at ∼27°S located within mature Atacama seismic gap. Combined 2D refraction, multibeam bathymetry, local seismicity show a typical oceanic crust thickness 6–7 km P‐wave velocities between 3.0 7.3 km/s with slightly lower increased thicknesses underneath Ridge seamounts. latter likely due to...
Gas hydrates are relevant to global carbon cycling, climate change and ocean acidification. In particular, play an important role in sub-seafloor fluid migration because they reduce the porosity permeability of sediments. hydrates, their associated underlying free gas zones, have also been linked sediment failure submarine mass transports. The active Hikurangi Margin hosts New Zealand’s largest hydrate province, with concentrated accumulations generally focused below accretionary...
Wide-angle refraction seismic experiments are generally executed along 2D profiles. In this study, we investigate the potential and limitations of using adjacent wide-angle profiles for 3D tomography. From this, provide suggestions on best practices when designing new offshore so that data can be used both We use two example from Ligurian Sea, 2006 SARDINIA Experiment 2017/8 AlpArray—LOBSTER Experiment, to highlight benefits pitfalls common station-shot geometries: parallel crossing through...
Geophysical investigations of the northern Hikurangi subduction zone northeast New Zealand, image fore‐arc and surrounding upper lithospheric structures. A seismic velocity (Vp) field is determined from wide‐angle data, our structural interpretation supported by multichannel reflection stratigraphy gravity magnetic modeling. We found that subducting Plateau carries about 2 km sediments above a mixed layer volcaniclastics, limestone, chert. The plateau crust characterized Vp = 4.9–6.7 km/s...
We present results from a seismic refraction and wide‐angle experiment surveying an oceanic core complex on the Mid‐Atlantic Ridge at 22°19′N. Oceanic complexes are settings where petrological sampling found exposed lower crustal upper mantle rocks, exhumed by asymmetric accretion involving detachment faulting magmatically starved ridge sections. Tomographic inversion of our data yielded lateral variations P wave velocity within 3 to 4 km lithosphere across median valley. A joint modeling...
Abstract. The Ligurian Basin is located in the Mediterranean Sea to north-west of Corsica at transition from Western Alpine orogen Apennine system and was generated by south-eastward trench retreat Apennines–Calabrian subduction zone. Late-Oligocene-to-Miocene rifting caused continental extension subsidence, leading opening basin. Yet it remains unclear if break-up seafloor spreading. To reveal its lithospheric architecture, we acquired a 130 km long seismic refraction wide-angle reflection...
Abstract New marine geophysical data acquired across the partly ice‐covered northern East Greenland continental margin highlight a complex interaction between tectonic and magmatic events. Breakup‐related lava flows are imaged in reflection seismic as seaward dipping reflectors, which found to decrease size both northward southward from central point at 75°N. We provide evidence that magnetic anomaly pattern shelf area is related volcanic phases not presence of oceanic crust. The remnant...
SUMMARY To constrain seismic anisotropy under and around the Alps in Europe, we study SKS shear wave splitting from region densely covered by AlpArray network. We apply a technique based on measuring intensity, constraining well both fast orientation delay. Four years of teleseismic earthquake data were processed, 723 temporary permanent broad-band stations deployment including ocean-bottom seismometers, providing spatial coverage that is unprecedented. The applied automatically (without...
Abstract. The nature of the Ionian Sea crust has been subject scientific debate for more than 30 years, mainly because seismic imaging deep and upper mantle Abyssal Plain (IAP) not conclusive to date. IAP is sandwiched between Calabrian Hellenic subduction zones in central Mediterranean. A NNE–SSW-oriented 131 km long refraction wide-angle reflection profile, consisting eight ocean bottom seismometers hydrophones, was acquired 2014. profile designed univocally confirm proposed oceanic as a...
Summary We take advantage of the new large AlpArray Seismic Network (AASN) as part research initiative (www.alparray.ethz.ch), to establish a consistent seismicity-catalogue for greater Alpine region (GAR) time period 2016 January 1–2019 December 31. use data from 1103 stations including AASN backbone composed 352 permanent and 276 (including 30 OBS) temporary broad-band (network code Z3). Although characterized by moderate seismic hazard, European Alps surrounding regions have higher risk...
Active ridge propagation frequently occurs along spreading ridges and profoundly affects crest segmentation over time. The mechanisms controlling propagation, however, are poorly understood. At the slow Mid-Atlantic Ridge at 21.5°N a seismic refraction wide-angle reflection profile surveyed crustal structure segment controlled by rapid propagation. Tomographic traveltime inversion of data suggests that axis is melt supply; thus, crust thickest, 8 km, domed center decreases in thickness...
Abstract The DOBRE-2 wide-angle reflection and refraction profile was acquired in June 2007 as a direct, southwestwards prolongation of the 1999 DOBREfraction'99 that crossed Donbas Foldbelt eastern Ukraine. It crosses Azov Massif East European Craton, Sea, Kerch Peninsula (the easternmost part Crimea) northern Black Sea Basin, thus traversing entire Crimea–Caucasus compressional zone centred on Peninsula. recorded mix onshore explosive sources well airguns at sea. A variety single-component...
Abstract Crustal structure provides the key to understand interplay of magmatism and tectonism, while oceanic crust is constructed at Mid‐Ocean Ridges (MORs). At slow spreading rates, magmatic processes dominate central areas MOR segments, whereas segment ends are highly tectonized. The TAMMAR Mid‐Atlantic Ridge (MAR) between 21°25′N 22°N a magmatically active segment. ~4.5 Ma this started propagate south, causing termination transform fault 21°40′N. This stopped long‐lived detachment...
Abstract Due to the complexity of 2D magnetic anomaly maps north 18°S and sparsity seismic data, tectonic evolution northern Lau Basin has not yet been unraveled. We use a multi‐method approach reconstruct formation basin at ∼16°S by compiling seismic, magnetic, gravimetric geochemical data along 185 km‐long crustal transect. identified zonation which preserves level subduction input time crust's formation. Paired with seafloor magnetization, enabled us qualitatively approximate dynamic...
Abstract We report the results of a two‐dimensional tomographic inversion marine seismic refraction data from an array ocean‐bottom seismographs (OBSs), which produced image crustal structure along axial valley ultraslow spreading Mid‐Cayman Spreading Center (MCSC). The velocity model shows variations in thickness and properties young oceanic crust that are consistent with existence two magmatic‐tectonic segments 110 km long center. Seismic wave speeds exhumed mantle at boundary between...