A5029019995- Geological and Geophysical Studies Worldwide
- earthquake and tectonic studies
- Archaeological and Historical Studies
- Geological and Tectonic Studies in Latin America
- Geology and Paleoclimatology Research
- Methane Hydrates and Related Phenomena
- Geological and Geochemical Analysis
- Geological formations and processes
- Archaeological and Geological Studies
- Hydrocarbon exploration and reservoir analysis
- Geological and Geophysical Studies
- Coral and Marine Ecosystems Studies
- Geological Studies and Exploration
- Seismic Imaging and Inversion Techniques
- Marine Biology and Ecology Research
- Maritime and Coastal Archaeology
- Geomagnetism and Paleomagnetism Studies
- Coastal and Marine Dynamics
- Mediterranean and Iberian flora and fauna
- Underwater Acoustics Research
- Seismic Waves and Analysis
- Medieval Architecture and Archaeology
- Landslides and related hazards
- Oceanographic and Atmospheric Processes
- Marine and coastal plant biology
Institut Català de Ciències del Clima
2013-2024
Institut de Ciències del Mar
2015-2024
Centro de Investigaciones Biológicas Margarita Salas
2019-2020
Consejo Superior de Investigaciones Científicas
2004-2015
Marine Technology Unit
2002-2013
Centro Mediterráneo de Investigaciones Marinas y Ambientale
2002-2012
National Research Council
2006
Geociencias Barcelona
2000-2003
National Oceanography Centre
1997-2000
Universitat de Barcelona
1994-1997
First posted July 12, 2012 For additional information, contact: Active Tectonics and Seafloor Mapping LabOregon State UniversityCollege of Earth, Ocean, Atmospheric SciencesBurt 130, Corvallis OR 97331 Turbidite systems along the continental margin Cascadia Basin from Vancouver Island, Canada, to Cape Mendocino, California, United States, have been investigated with swath bathymetry; newly collected archive piston, gravity, kasten, box cores; accelerator mass spectrometry radiocarbon dates....
Log and core data document gas saturations as high 90% in a coarse‐grained turbidite sequence beneath the hydrate stability zone (GHSZ) at south Hydrate Ridge, Cascadia accretionary complex. The geometry of this gas‐saturated bed is defined by strong, negative‐polarity reflection 3D seismic data. Because buoyancy, pressure equals or exceeds overburden stress immediately GHSZ summit. We conclude that focused into from large volume complex trapped until forces to migrate through seafloor...
Research Article| January 01, 2003 Mapping active faults offshore Portugal (36°N–38°N): Implications for seismic hazard assessment along the southwest Iberian margin Eulàlia Gràcia; Gràcia 1Centre Mediterrani d'Investigacions Marines i Ambientals, Unidad de Tecnología Marina (CSIC), 08003 Barcelona, Spain Search other works by this author on: GSW Google Scholar Juanjo Dañobeitia; Dañobeitia Jaume Vergés; Vergés 2Institut Ciències la Terra "Jaume Almera" 08028 PARSIFAL Team 4See below...
The Gulf of Cadiz, located at the southwestern Iberian margin, is characterized by widespread seismicity, compressional and strike‐slip fault plane solutions a large, elongated positive free‐air gravity anomaly, Cadiz Gravity High (GCGH). Multichannel seismic profiles across along GCGH, together with bathymetric data, allow us to study in detail tectonic architecture crustal structure Cadiz. upper shelf slope includes main structural domains Betic fold thrust belt. In middle part Gulf,...
On November 1, 1755, the city of Lisbon was completely devastated by combined effect a tremendous earthquake, tsunami waves, and fire. The 1755 earthquake most destructive cataclysm recorded in western Europe since Roman Republic, with an estimated magnitude M w ∼8.5 [ Martins Mendes Victor , 1990] t = 8.5. felt as far away Great Britain Finland. hit many coastal cities along southwest Iberia North Africa, causing heavy destruction Tanger Casablanca.
Posidonia oceanica is a widespread coastal Mediterranean seagrass which accumulates in its subsurface large quantities of organic material derived from roots, rhizomes and leaf sheaths embedded sandy sediments. These deposits may be up to several meters thick as they accumulate over thousands years forming the matte , whose high content carbon plays major role global ocean cycle. In this study, very high‐resolution seismo‐acoustic methods were applied image features P. meadow at Portlligat...
We relate the late Holocene northern San Andreas fault (NSAF) paleo- seismic history developed using marine sediment cores along California continental margin to a similar dataset of collected Cascadia margin, including channels from Barclay Canyon off Vancouver Island just north Mon- terey Bay. Stratigraphic correlation and evidence synchronous triggering imply earthquake origin, both temporal records are compatible with onshore paleoseis- mic data. In order make comparisons between NSAF...
Marine transform faults and associated fracture zones (MTFFZs) cover vast stretches of the ocean floor, where they play a key role in plate tectonics, accommodating lateral movement tectonic plates allowing connections between ridges trenches. Together with continental counterparts MTFFZs, these structures also pose risk to human societies as can generate high magnitude earthquakes trigger tsunamis. Historical examples are Sumatra-Wharton Basin Earthquake 2012 (M8.6) Atlantic Gloria Fault...
Abstract We present a new classification of geological domains at the Africa‐Eurasia plate boundary off SW Iberia, together with regional geodynamic reconstruction spanning from Mesozoic extension to Neogene‐to‐present‐day convergence. It is based on seismic velocity and density models along transect running Horseshoe Seine abyssal plains, which combined previously available geophysical region. The basement structure Abyssal Plain indicates presence highly heterogeneous, thin oceanic crust...
We report on newly discovered mud volcanoes located at ~4500 m water depth ~90 km west of the deformation front accretionary wedge Gulf Cadiz, and thus outside their typical geotectonic environment.Seismic data suggest that fluid flow is mediated by a >400-km-long strike-slip fault marking transcurrent plate boundary between Africa Eurasia.Geochemical (Cl, B, Sr, 87 Sr/ 86 δ 18 O, δD) reveal fluids originate in oceanic crust older than 140 Ma.On rise to surface, these receive strong...
Recently acquired high‐resolution multichannel seismic profiles together with bathymetric and sub‐bottom profiler data from the external part of Gulf Cadiz (Iberia‐Africa plate boundary) reveal active deformation involving old (Mesozoic) oceanic lithosphere. This area is located 180 km offshore SW Iberian Peninsula embraces prominent NE‐SW trending Coral Patch Ridge, surrounding deep Horseshoe Seine abyssal plains. E‐W dextral strike‐slip faults showing surface flower‐like structures...
Abstract Seismicity and tectonic structure of the Alboran Sea were derived from a large amphibious seismological network deployed in offshore basins onshore Spain Morocco, an area where convergence between African Eurasian plates causes distributed deformation. Crustal local earthquake data suggests that is underlain by thinned continental crust with mean thickness about 20 km. During 5 months operation, total 229 earthquakes located within neighboring areas. Earthquakes generally crustal...