A5045870096- Geology and Paleoclimatology Research
- Geological and Geochemical Analysis
- Geological formations and processes
- Methane Hydrates and Related Phenomena
- earthquake and tectonic studies
- Geological Studies and Exploration
- Geological and Geophysical Studies
- Marine Biology and Ecology Research
- Maritime and Coastal Archaeology
- Hydrocarbon exploration and reservoir analysis
- Oceanographic and Atmospheric Processes
- Aeolian processes and effects
- Veterinary Orthopedics and Neurology
- Climate change and permafrost
- Paleontology and Stratigraphy of Fossils
- Geophysical and Geoelectrical Methods
- Geomagnetism and Paleomagnetism Studies
- Isotope Analysis in Ecology
- Underwater Acoustics Research
- Marine and fisheries research
- Arctic and Antarctic ice dynamics
- Geochemistry and Geologic Mapping
- Geological Modeling and Analysis
- High-pressure geophysics and materials
- Geological Formations and Processes Exploration
GEOMAR Helmholtz Centre for Ocean Research Kiel
2018-2023
Monterey Bay Aquarium Research Institute
2015-2021
GEOMAR Technologie GmbH - GTG
2021
Université de Bretagne Occidentale
2014-2018
Centre National de la Recherche Scientifique
2014-2018
Institut Universitaire Européen de la Mer
2014-2018
Geo-Ocean
2018
Abstract Meter‐scale AUV bathymetric mapping and ROV sampling of the entire 47 km‐long Alarcon Rise between Pescadero Tamayo transforms show that shallowest inflated portion segment hosts all four active hydrothermal vent fields youngest, hottest, highest effusion rate lava flows. This part is located ∼1/3 way paved by a 16 km 2 channelized flow erupted from 9 en echelon fissures larger than historic flows on East Pacific or Gorda Juan de Fuca Ridges. Starting ∼5 south transform, 6.5...
The Mohns Ridge is located in the Norwegian-Greenland Sea, between Jan Mayen Transform Fault and Mohns-Knipovich Bend. It an ultra-slow spreading ridge section with a full rate of 15 to 17 mm/yr. Over its 580 km, variations axis depth crustal thickness attest overall decrease magma supply associated distance from Hotspot. In parallel seafloor ages based on sediment sedimentation axial valley relatively young volcanic activity (
The vast majority of the Earth’s volcanism takes place in deep ocean along mid-ocean ridges (MORs), yet because it is difficult to detect and observe, also relatively poorly understood. MOR occurs where tectonic plates spread apart mainly produces effusive basaltic fissure eruptions dikes reach surface. character frequency varies greatly as a function spreading rate magma supply, does morphology ridge crest, balance between volcanic construction faulting, scales segmentation. depth...
Abstract During eruptions onto low slopes, basaltic Pahoehoe lava can form thin lobes that progressively coalesce and inflate to many times their original thickness, due a steady injection of magma beneath brittle viscoelastic layers cooled develop sufficient strength retain the flow. Inflated flows forming tumuli pressure ridges have been reported in different kinds environments, such as at contemporary subaerial Hawaiian‐type volcanoes Hawaii, La Réunion Iceland, continental environments...
Abstract Mapping and sampling four sections of the slow‐spreading Reykjanes Ridge provide insight into how tectonic volcanic activity varies with distance from Iceland plume. The studied areas are characterized by significant variations in water depth, lava chemistry, crustal thickness, thermal structure, ridge morphology. For each study area, fault pattern dimension, strain, seamount morphology, density inferred 15 m‐resolution bathymetry. These observations combined geochemical analysis...
Abstract The Endeavour Segment of the Juan de Fuca Ridge is well known for its abundance hydrothermal vents and chimneys. One‐meter scale multibeam mapping data collected by an autonomous undersea vehicle revealed 572 chimneys along central 14 km segment, although only 47 are named to be active. Hydrothermal deposits restricted axial graben near‐rims above a seismically mapped magma lens. sparse eruptive activity on segment during last 4,300 years has not buried inactive chimneys, as occurs...
Abstract Quantifying eruption dynamics in submarine environments is challenging. During the 2015 of Axial Seamount, formation hummocky mounds along north rift was accompanied by tens thousands impulsive acoustic signals generated interaction lava and seawater. A catalog these sounds integrated with detailed seafloor mapping to better understand eruptive processes time space. Mounds grew over a period 28 days average extrusion rates 22 45 m 3 s −1 . The most distant mounds, ~9.5 15.5 km down...
During RV MS Merian expedition MSM75, an international, multidisciplinary team explored the Reykjanes Ridge from June to August 2018. The first area of study, Steinahóll (150–350 m depth), was chosen based on previous seismic data indicating hydrothermal activity. sampling strategy included ship- and AUV-mounted multibeam surveys, Remotely Operated Vehicle (ROV), Epibenthic Sledge (EBS), van Veen grab (vV) deployments. Upon returning during final days vent sites were discovered using ROV...
The Ægir Ridge System (ARS) is an ancient extinct spreading axis in the Nordic seas extending from upper slope east of Iceland (∼550 m depth), as part its Exclusive Economic Zone (EEZ), to a depth ∼3,800 Norwegian basin. Geomorphologically rift valley, ARS has canyon-like structure that may promote increased diversity and faunal density. main objective this study was characterize benthic habitats related macro- megabenthic communities along ARS, influence water mass variables on them. During...
Abstract Spreading processes at the axes of fast spreading ridges are mainly controlled by magmatic activity, whereas tectonic activity dominates further away from axis. High‐resolution near‐bottom bathymetry data, photographs, videos, and human observations submersible surveys used to develop a detailed analysis 16°N segment East Pacific Rise (EPR). These data evaluate how highly segment, close hot spot, affects nucleation evolution faulting patterns impacts evaluation strain within 2 km...
Abstract The 16°N segment of the East Pacific Rise is most overinflated and shallowest this fast‐spreading ridge, in relation with an important magma flux due to proximity Mathematician hotspot. Here, we analyze detailed morphology axial dome Axial Summit Trough (AST), lava morphology, geometry fissures faults, regard attributes chamber beneath nearby data used are 1 m resolution bathymetry combined seafloor photos videos. At summit, AST highly segmented by 10 third‐order fourth‐order...
Abstract Mid‐ocean ridge axes are marked by segmentation of the and underlying magmatic systems. Fine‐scale has mainly been studied along fast‐spreading ridges. Here we offer insight into third‐ fourth‐order intermediate‐spreading ridges their temporal evolution. The Alarcón Rise Endeavour Segment have similar spreading rates (49 52.5 mm/year, respectively) but contrasting morphologies that vary from an axial high with a relatively narrow summit trough to valley. One‐meter resolution...
Abstract Plate divergence along mid‐ocean ridges is accommodated through faulting and magmatic accretion, and, at overlapping spreading centers (OSC), distributed across two curvilinear ridge axes. One‐meter resolution bathymetry acquired by autonomous underwater vehicles, combined with distribution ages of lava flows, used to: (a) analyze the spatial temporal faults, fissures in OSC between distal south rift zone Axial Seamount Vance Segment, (b) locate axes, (c) calculate extension, (d)...
The mid-ocean rift in the Red Sea is one of youngest rifting systems on Earth. Only recently, state-of-the-art methods and modern deep-sea instruments have been used to explore this young unique volcanic system. During first autonomous underwater vehicle surveys Rift Spring 2022, we collected multibeam bathymetry, backscatter, sub-bottom profiler data, water column data over a 9 km long ridge segment Hadarba Deep between 22.49°N 22.56°N investigate volcano-tectonic processes ultra-slow...