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| Messinian Basin | |
|---|---|
| Name | Messinian Basin |
| Type | Basin |
| Location | Mediterranean Sea |
Messinian Basin The Messinian Basin is a major depositional and structural depression in the western and central Mediterranean Sea associated with the late Miocene Mediterranean events. It records crucial evidence for the Messinian Salinity Crisis, links to the Betic Cordillera, Apennines, Atlas Mountains, and preserves stratigraphic archives used by researchers from institutions such as the National Research Council (Italy), CNRS, Instituto Geológico y Minero de España, and the International Ocean Discovery Program. The basin is central to studies by geologists tied to the International Union of Geological Sciences and paleoclimatologists from the Woods Hole Oceanographic Institution.
The basin underlies parts of the Tyrrhenian Sea, Balearic Sea, Alboran Sea, and eastern reaches near the Adriatic Sea, bounded by the Sicilian Channel, Gibraltar Arc, Corsica, Sardinia, and the Iberian Peninsula. Bathymetric features include abyssal plains, continental shelves, submarine canyons such as the Nile Canyon, and structural highs linked to the Calabrian Arc and Hercynian Belt. Regional circulation patterns interact with water masses from the Atlantic Ocean, the Alboran Gyre, and the Levantine Basin influencing sediment dispersal studied by researchers at the University of Barcelona and University of Naples Federico II.
The basin’s history is dominated by the Messinian Salinity Crisis at the end of the Miocene, when restriction of the Mediterranean Sea from the Atlantic Ocean through the Strait of Gibraltar produced widespread evaporite deposition including halite and gypsum layers. Competing hypotheses include desiccation models invoked by investigators affiliated with the Royal Society, the European Geosciences Union, and proponents of the Zanclean flood recovery scenario supported by teams from the University of Cambridge and National Oceanography Centre (UK). Geological evidence was gathered during expeditions like ODP Leg 160, ICDP drilling, and cruises organized by the Ifremer and the Spanish Institute of Oceanography.
Stratigraphic units encompass Miocene marine marls, evaporitic suites, turbidites, and Pliocene transgressive sequences correlated with sections at Gibraltar, Sicily, Algeria, Tunisia, and the Balearic Islands. Sedimentological studies document cyclicity, seismites, and prograding clinoforms associated with episodes reported by teams at the University of Granada and the University of Salamanca. Key lithologies are pelagic marls, siliciclastic turbidites, laminated evaporites, and fluvial-derived conglomerates tied to regional rivers like the Ebro River and Rhône River provenance systems analyzed via isotopic work at the Institut de Physique du Globe de Paris.
Proxy records from the basin include stable isotopes, foraminiferal assemblages, and paleomagnetic chronologies integrated by researchers from the Lamont–Doherty Earth Observatory, ETH Zurich, Scripps Institution of Oceanography, and the Max Planck Institute for Chemistry. Reconstructions suggest extreme salinity fluctuations, evaporative drawdown, and transient hypersaline lakes contrasted with rapid reflooding events linked to the Zanclean transgression. Climate links connect Messinian events to global Miocene cooling trends observed in cores from the Pacific Ocean, the Atlantic Ocean, and terrestrial records in the Rocky Mountains and Himalayas.
Fossil assemblages include benthic and planktonic foraminifera, ostracods, bivalves, gastropods, and vertebrate remains recovered from basinal and marginal sequences near Sicily, Gibraltar, Tunisia, and Morocco. Terrestrial faunas and floras preserved in marginal basins provide ties to faunal provinces documented in the Iberian Peninsula, North Africa, Balkans, and the Levant. Paleontologists from the Natural History Museum, London, Museo di Storia Naturale di Milano, and the National Museum of Natural Sciences (Spain) have described assemblages that inform biogeographic patterns paralleling records from the Pannonian Basin and Paratethys.
Tectonic drivers include convergence related to the African Plate and Eurasian Plate collision, slab roll-back beneath the Calabrian Arc, and back-arc extension in the Tyrrhenian Sea producing subsidence, uplift, and strike-slip reorganization along faults such as the Maghreb–Europe Ridge and the Alboran Fault System. Regional evolution has been modeled by groups at the University of Lisbon, King’s College London, and the Politecnico di Milano, integrating seismic reflection profiles from surveys conducted by ENI and academic consortia. Interaction with the Apennine orogeny and rift-related processes shapes the basin’s long-term architecture.
Evaporite-hosted deposits, halite layers, and syn-evaporitic sandstones have implications for hydrocarbons explored by energy companies including ENI, TotalEnergies, and consortia working with national agencies such as OGA (Algeria) and the Dirección General de Política Energética y Minas (Spain). Salt-related structures create traps for hydrocarbons analogous to plays in the Gulf of Mexico and North Sea fields developed by BP and Shell. Mineral extraction, deep brine resources, and potential CO2 storage in evaporitic sequences have been assessed by teams at Imperial College London and the European Commission research programs. Exploration campaigns have involved seismic acquisition contracts with firms like Schlumberger and drilling programs coordinated with the International Seabed Authority.
Category:Basins of the Mediterranean Sea