Mediterranean-Black Sea gateway exchange

Author(s)
, Wout Krijgsman, Iuliana Vasiliev, Anouk Beniest, Timothy Lyons, Johanna Lofi, Gabor Tari, Caroline P. Slomp, Namik Cagatay, Maria Triantaphyllou, Rachel Flecker, Dan Palcu, Cecilia McHugh, Helge Arz, Pierre Henry, Karen Lloyd, Gunay Cifci, Özgür Sipahioglu, Dimitris Sakellariou, Konstantina Agiadi, Federico Andreetto, Diksha Bista, Francesca Bulian, Geanina Butiseaca, Pinar Ertepinar, Luca Gasperini, Liviu Giosan, Christian Gorini, Erhan Gülyüz, Thomas Hoyle, Yongsong Huang, Nuretdin Kaymakci, Sergei Lazarev, Lucas Lourens, Oleg Mandic, David McInroy, Javier Molina-Hernandez, Jimmy Moneron, Andreas Mulch, Fadl Raad, Elisabeth Skampa, Antje Wegwerth, Frank Wesselingh, Anastasia Yanchilina
Abstract

The MagellanPlus workshop "BlackGate"addressed fundamental questions concerning the dynamic evolution of the Mediterranean-Black Sea (MBS) gateway and its palaeoenvironmental consequences. This gateway drives the Miocene-Quaternary circulation patterns in the Black Sea and governs its present status as the world's largest example of marine anoxia. The exchange history of the MBS gateway is poorly constrained because continuous Pliocene-Quaternary deposits are not exposed on land adjacent to the Black Sea or northern Aegean. Gateway exchange is controlled by climatic (glacio-eustatic-driven sea-level fluctuations) and tectonic processes in the catchment as well as tectonic propagation of the North Anatolian Fault Zone (NAFZ) in the gateway area itself. Changes in connectivity trigger dramatic palaeoenvironmental and biotic turnovers in both the Black Sea and Mediterranean domains. Drilling a Messinian to Holocene transect across the MBS gateway will recover high-amplitude records of continent-scale hydrological changes during glacial-interglacial cycles and allow us to reconstruct marine and freshwater fluxes, biological turnover events, deep biospheric processes, subsurface gradients in primary sedimentary properties, patterns and processes controlling anoxia, chemical perturbations and carbon cycling, growth and propagation of the NAFZ, the timing of land bridges for Africa and/or Asia-Europe mammal migration, and the presence or absence of water exchange during the Messinian salinity crisis. During thorough discussions at the workshop, three key sites were selected for potential drilling using a mission-specific platform (MSP): one on the Turkish margin of the Black Sea (Arkhangelsky Ridge, 400mb.s.f., metres below the seafloor), one on the southern margin of the Sea of Marmara (North Imrali Basin, 750mb.s.f.), and one in the Aegean (North Aegean Trough, 650mb.s.f.). All sites target Quaternary oxic-anoxic marl-sapropel cycles. Plans include recovery of Pliocene lacustrine sediments and mixed marine-brackish Miocene sediments from the Black Sea and the Aegean. MSP drilling is required because the JOIDES Resolution cannot pass under the Bosporus bridges. The wider goals are in line with the aims and scope of the International Ocean Discovery Program (IODP) "2050 Science Framework: Exploring Earth by Scientific Ocean Drilling"and relate specifically to the strategic objectives "Earth's climate system", "Tipping points in Earth's history", and "Natural hazards impacting society".

Organisation(s)
Department of Geology, Department of Palaeontology
External organisation(s)
Utrecht University, Senckenberg Forschungsinstitut und Naturmuseum, Vrije Universiteit Amsterdam, University of California, Riverside, Université Paul-Valéry Montpellier 3, OMV, Istanbul Technical University, National & Kapodistrian University of Athens, University of Bristol, Instituto Oceanográfico, City University of New York, Lamont-Doherty Earth Observatory, Leibniz-Institut für Ostseeforschung, National Center for Scientific Research (CNRS), Aix-Marseille Université, University of Tennessee at Knoxville, Dokuz Eylül University, Turkish Petroleum Corporation, Hellenic Centre for Marine Research, British Geological Survey, Universidad de Salamanca, Middle East Technical University, Institute of Genetics and Biophysics "Adriano Buzzati-Traverso", CNR, Woods Hole Oceanographic Institution, Université Paris VI - Pierre-et-Marie-Curie, Czech Academy of Sciences, CASP, Brown University, Université de Fribourg, Naturhistorisches Museum Wien (NHM), University of London, Hebrew University Jerusalem, Naturalis Biodiversity Center
Journal
Scientific Drilling
Volume
31
Pages
93-110
No. of pages
18
ISSN
1816-8957
DOI
https://doi.org/10.5194/sd-31-93-2022
Publication date
10-2022
Peer reviewed
Yes
Austrian Fields of Science 2012
105101 General geology
ASJC Scopus subject areas
Energy Engineering and Power Technology, Mechanical Engineering
Portal url
https://ucris.univie.ac.at/portal/en/publications/mediterraneanblack-sea-gateway-exchange(08aaf1a1-9ac6-49f1-97b6-b24cbb4da3bf).html