A5058013066- earthquake and tectonic studies
- Methane Hydrates and Related Phenomena
- Geological and Geochemical Analysis
- Geology and Paleoclimatology Research
- Geological formations and processes
- Marine and environmental studies
- Geological and Geophysical Studies
- Hydrocarbon exploration and reservoir analysis
- Geological Studies and Exploration
- Maritime and Coastal Archaeology
- Geochemistry and Geologic Mapping
- Oceanographic and Atmospheric Processes
- Geological and Geophysical Studies Worldwide
- Geophysics and Gravity Measurements
- High-pressure geophysics and materials
- Geochemistry and Elemental Analysis
- Isotope Analysis in Ecology
- Marine Biology and Ecology Research
- Groundwater and Isotope Geochemistry
- Coral and Marine Ecosystems Studies
- Maritime Navigation and Safety
- Underwater Acoustics Research
- Marine and coastal plant biology
- International Maritime Law Issues
- Radioactive contamination and transfer
GEOMAR Helmholtz Centre for Ocean Research Kiel
2016-2025
GEOMAR Technologie GmbH - GTG
2017-2022
Uppsala University
2016
Abstract Microbathymetry data, in situ observations, and sampling along the 13°20′N oceanic core complexes (OCCs) reveal mechanisms of detachment fault denudation at seafloor, links between tectonic extension mass wasting, expose nature corrugations, ubiquitous OCCs. In initial stages faulting high‐angle fault, scarps show extensive wasting that reduces their slope. Flexural rotation further lowers scarp slope, hinders resulting morphologically complex chaotic terrain breakaway denuded...
Abstract The crustal and tectonic structure of the Red Sea especially maximum northward extent (ultra)slow spreading centre has been debated—mainly due to a lack detailed data. Here, we use compilation earthquake vertical gravity gradient data together with high-resolution bathymetry show that ocean is occurring throughout entire basin similar in style at other mid-ocean ridges globally, only one first-order offset along axis. Off-axis traces axial volcanic highs, typical features...
Research Article| December 01, 2014 Drilling Shallow-Water Massive Sulfides at the Palinuro Volcanic Complex, Aeolian Island Arc, Italy Sven Petersen; Petersen † 1GEOMAR, Helmholtz Centre for Ocean Kiel, Wischhofstrasse 1-3, 24148 Germany †Corresponding author: e-mail, spetersen@geomar.de Search other works by this author on: GSW Google Scholar Thomas Monecke; Monecke 2Department of Geology and Geological Engineering, Colorado School Mines, 1516 Illinois Street, Golden, 80401 Anne Westhues;...
Abstract The Red Sea Rift is an ultra-slow spreading rift filled with Miocene salt and younger sediments. While volcanic features can be observed in exposed areas the southern Rift, evidence of volcanism sediment-blanketed regions central northern has been lacking, leaving open whether mid-ocean axis continues beneath them. Here, we present new multichannel seismic high-resolution bathymetric data these blanketed regions. Our reveals multiple instances where oceanic crust traced evaporite...
The Vesturdjúp Basin is located at the northeastern edge of Irminger Sea, bordered by southern Greenland to west, Denmark Strait and Iceland north, Reykjanes Ridge east. To south, it opens into North Atlantic Ocean. basin’s bathymetry characterized large sediment rafts shaped intense bottom-water currents, a distinctive ocean floor fabric, numerous cone-shaped volcanoes1. In summer 2024, Meteor Expedition M201 explored seamounts Basin1. addition comprehensive geological...
Hydrothermal activity has been intensively studied at mature mid-ocean ridges and is crucial for the formation of mineral resources, as habitats chemosynthetic communities, cooling newly formed oceanic lithosphere1. However, role hydrothermal circulation in early history a young emerging ocean basin shortly after continental breakup geological expression its vents, their geochemical characteristics, associated ecosystems can only be few locations. The Red Sea Rift one Earth’s...
The Red Sea is one of the youngest ocean basins on Earth and classified as an ultra-slow spreading ridge, with rates decreasing from 15 mm/year in Southern to 7 Northern Sea. Zabargad Fracture Zone (ZFZ), largest rift-axis offset (~100 km) (23.5oN 26oN), separates Central proximity seismically active ZFZ coastal cities infrastructure region has implications for regional seismic hazard. However, thick salt sedimentary covers obscure exact geometry oceanic axes, any potential transform faults...
Submarine explosive volcanism poses significant hazards to coastal communities, infrastructures, and marine air traffic. However, our understanding of the mechanisms, frequencies, distributions submarine eruptions is limited due their inaccessibility. This observational gap particularly critical for shallow environments, where interplay between magma seawater can lead violent that may trigger destructive tsunamis, pyroclastic surges, extensive pumice rafts, large airborne ash plumes. In this...
Seamounts are massive geological structures and hotspots of productivity biodiversity in the deep ocean, playing a crucial ecological role similar to that coral reefs shallow waters. They ocean currents, biogeochemical cycles, marine ecosystems, supporting diverse life providing essential ecosystem services. Among others, unique endemism seamounts offers significant potential for discovering bioactive agents could benefit humanity. Understanding seamount systems is vital, especially as...
Summary The ultramafic‐hosted Logatchev hydrothermal field (LHF) is characterized by vent fluids, which are enriched in dissolved hydrogen and methane compared with fluids from basalt‐hosted systems. Thick sediment layers LHF partly covered characteristic white mats. In this study, these sediments were investigated order to determine biogeochemical processes key organisms relevant for primary production. Temperature profiling at two mat‐covered sites showed a conductive heating of the...
Properly assessing the extent and magnitude of fault ruptures associated with large earthquakes is critical for understanding behavior hazard. Submarine faults can trigger tsunamis, whose characteristics are defined by geometry seafloor displacement, studied primarily through indirect observations (e.g., seismic event parameters, profiles, shipboard bathymetry, coring) rather than direct ones. Using deep-sea vehicles, we identify first time a marker coseismic slip on submarine plane along...
Habitat heterogeneity and species diversity are often linked. On the deep seafloor, sediment variability hard-substrate availability influence geographic patterns of richness turnover. The assumption a generally homogeneous, sedimented abyssal seafloor is at odds with fact that faunal in some regions exceeds shallow-water environments. Here we show, using ground-truthed analysis multibeam sonar data, may be much rockier than previously assumed. A combination bathymetry ruggedness,...
Abstract The relationships between tectonic processes, magmatism, and hydrothermal venting along ∼600 km of the slow‐spreading Mariana back‐arc 12.7°N 18.3°N reveal a number similarities differences compared to mid‐ocean ridges. Analysis volcanic geomorphology structure highlights complexity spreading center. Here, ridge segmentation is controlled by large‐scale basement structures that appear predate rifting. These also control orientation chains cross‐arc volcanoes characterize this...
Serpentinized peridotite and gabbronorite represent the host rocks to active, ultramafic‐hosted Logatchev hydrothermal field at Mid‐Atlantic Ridge. We use trace element, δ 18 O 87 Sr/ 86 Sr data from bulk rock samples mineral separates in order constrain controls on geochemical budget within system. The element of serpentinized show strong compositional variations indicating a range processes. Some peridotites experienced modifications associated with melt‐rock interaction processes prior...