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Krijgsman, Wout; Vasiliev, Iuliana; Beniest, Anouk; Lyons, Timothy; Lofi, Johanna; Tari, Gabor; Slomp, Caroline P.; Cagatay, Namik; Triantaphyllou, Maria; Flecker, Rachel; Palcu, Dan; McHugh, Cecilia; Arz, Helge; Henry, Pierre; Lloyd, Karen; Cifci, Gunay; Sipahioglu, Özgür; Sakellariou, Dimitris

Mediterranean–Black Sea gateway exchange: scientific drilling workshop on the BlackGate project

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  • Media type: E-Article
  • Title: Mediterranean–Black Sea gateway exchange: scientific drilling workshop on the BlackGate project
  • Contributor: Krijgsman, Wout; Vasiliev, Iuliana; Beniest, Anouk; Lyons, Timothy; Lofi, Johanna; Tari, Gabor; Slomp, Caroline P.; Cagatay, Namik; Triantaphyllou, Maria; Flecker, Rachel; Palcu, Dan; McHugh, Cecilia; Arz, Helge; Henry, Pierre; Lloyd, Karen; Cifci, Gunay; Sipahioglu, Özgür; Sakellariou, Dimitris
  • Published: Copernicus GmbH, 2022
  • Published in: Scientific Drilling, 31 (2022), Seite 93-110
  • Language: English
  • DOI: 10.5194/sd-31-93-2022
  • ISSN: 1816-3459
  • Origination:
  • Footnote:
  • Description: Abstract. The MagellanPlus workshop “BlackGate” addressed fundamental questionsconcerning the dynamic evolution of the Mediterranean–Black Sea (MBS)gateway and its palaeoenvironmental consequences. This gateway drives theMiocene–Quaternary circulation patterns in the Black Sea and governs itspresent status as the world's largest example of marine anoxia. The exchangehistory of the MBS gateway is poorly constrained because continuousPliocene–Quaternary deposits are not exposed on land adjacent to the BlackSea or northern Aegean. Gateway exchange is controlled by climatic(glacio-eustatic-driven sea-level fluctuations) and tectonic processes inthe catchment as well as tectonic propagation of the North Anatolian FaultZone (NAFZ) in the gateway area itself. Changes in connectivity triggerdramatic palaeoenvironmental and biotic turnovers in both the Black Sea andMediterranean domains. Drilling a Messinian to Holocene transect across theMBS gateway will recover high-amplitude records of continent-scalehydrological changes during glacial–interglacial cycles and allow us toreconstruct marine and freshwater fluxes, biological turnover events, deepbiospheric processes, subsurface gradients in primary sedimentaryproperties, patterns and processes controlling anoxia, chemicalperturbations and carbon cycling, growth and propagation of the NAFZ, thetiming of land bridges for Africa and/or Asia–Europe mammal migration, and thepresence or absence of water exchange during the Messinian salinity crisis.During thorough discussions at the workshop, three key sites were selectedfor potential drilling using a mission-specific platform (MSP): one on theTurkish margin of the Black Sea (Arkhangelsky Ridge, 400 m b.s.f., metres below the seafloor), one on thesouthern margin of the Sea of Marmara (North İmrali Basin, 750 m b.s.f.), and onein the Aegean (North Aegean Trough, 650 m b.s.f.). All sites target Quaternaryoxic–anoxic marl–sapropel cycles. Plans include recovery of Pliocenelacustrine sediments and mixed marine–brackish Miocene sediments from theBlack Sea and the Aegean. MSP drilling is required because the JOIDES Resolutioncannot pass under the Bosporus bridges. The wider goals are in line with theaims and scope of the International Ocean Discovery Program (IODP) “2050 Science Framework: Exploring Earth byScientific Ocean Drilling” and relate specifically to the strategicobjectives “Earth's climate system”, “Tipping points in Earth's history”, and“Natural hazards impacting society”.
  • Access State: Open Access