Journal ArticleDOI
Gypsum precipitation from cold brines in an anoxic basin in the eastern Mediterranean
Maria Bianca Cita,Kim A. Kastens,Floyd W. McCoy,F. S. Aghib,A. Cambi,Angelo Camerlenghi,Cesare Corselli,Elisabetta Erba,M. Giambastiani,Timothy D Herbert,C. Leoni,P. Malinverno,A. Nosetto,Elisabetta Parisi +13 more
TLDR
In this article, the authors reported the discovery of cold brines in an entirely different geodynamic situation, a convergent plate boundary in the eastern Mediterranean, where the heatflow is very low and no hydrothermal activity occurs.Abstract:
In 1968 hot brines from which gypsum had precipitated were discovered in the Red Sea, in a divergent plate boundary setting with hydrothermal activity1. We now report the discovery of cold brines in an entirely different geodynamic situation, a convergent plate boundary in the eastern Mediterranean, where the heatflow is very low2 and no hydrothermal activity occurs. Decimetric pure gypsum crystals precipitate from the cold brines, which occupy the bottom of a rimmed anoxic basin near the southern edge of the Mediterranean Ridge, close to the Sirte Abyssal Plain. Nucleation of the crystals does not occur at the surface, but from the deep brines, because the salinity of the water is normal down to the depth of −3,000 m. We propose the name ‘Bacino Bannock’ for this basin, after the Consiglio Nazionale delle Ricerche R/V Bannock from which the bottom-water brines were surveyed and sampled.read more
Citations
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Journal ArticleDOI
Review and new aspects concerning the formation of eastern Mediterranean sapropels
TL;DR: In this article, the formation of sapropels in an anti-estuarine type of circulation was proposed, which was to some degree weakened relative to the present in response to reduction of the eastern Mediterranean excess of evaporation over freshwater input.
Journal ArticleDOI
The Messinian Salinity Crisis: Past and future of a great challenge for marine sciences
Marco Roveri,Rachel Flecker,Wout Krijgsman,Johanna Lofi,Stefano Lugli,Vinicio Manzi,Francisco Javier Sierro,Adele Bertini,Angelo Camerlenghi,Gert J. de Lange,Rob Govers,Frits Hilgen,Christian Hübscher,Paul Meijer,Marius Stoica +14 more
TL;DR: In this paper, a unifying stratigraphic framework of the Messinian Salinity Crisis (MSC) events has been constructed, derived mainly from onshore data and observations, but incorporating different perspectives for the offshore and provides hypotheses that can be tested by drilling the deep Mediterranean basins.
Journal ArticleDOI
Stratified prokaryote network in the oxic-anoxic transition of a deep-sea halocline
Daniele Daffonchio,Sara Borin,Tullio Brusa,Lorenzo Brusetti,Pwjj van der Wielen,Henk Bolhuis,Michail M. Yakimov,Giuseppe D'Auria,Laura Giuliano,Danielle Marty,Christian Tamburini,Terry J. McGenity,John E. Hallsworth,Andrea Sass,Kenneth N. Timmis,Anastasios Tselepides,G. J. de Lange,Andreas Hübner,John Thomson,SP Varnavas,F. Gasparoni,Hans W. Gerber,Elisa Malinverno,Cesare Corselli,Jean Garcin,Boyd A. McKew,Peter N. Golyshin,Nikolaos Lampadariou,Paraskevi N. Polymenakou,D. Calore,S. Cenedese,F. Zanon,Sven Hoog +32 more
TL;DR: A 2.5-m-thick chemocline with a steep NaCl gradient at 3.3 km within the water column betweeen Bannock anoxic hypersaline brine and overlying sea water is reported, supporting some of the most biomass-rich and active microbial communities in the deep sea.
Journal ArticleDOI
Microbiology of the Red Sea (and other) deep-sea anoxic brine lakes
TL;DR: A general overview of these unusual biotopes in the Red Sea is presented and compares them with other similar environments in the Mediterranean Sea and the Gulf of Mexico, with a focus on their microbial ecology.
Oxygen isotope and sapropel stratigraphy in the Eastern Mediterranean during the last 3.2 million years
Dick Kroon,Ian T Alexander,Mark G Little,Lucas Joost Lourens,A Matthewson,Alastair H. F. Robertson,Tatsuhiko Sakamoto +6 more
TL;DR: In this paper, stable oxygen isotope data from four holes drilled at the Ocean Drilling Program Site 967, which is located on the lower northern slope of the Eratosthenes Seamount, provide a continuous record of Eastern Mediterranean surface-water conditions during the last 3.2 Ma.
References
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BookDOI
Hot Brines and Recent Heavy Metal Deposits in the Red Sea
Egon T. Degens,David A. Ross +1 more
Journal ArticleDOI
Recent sapropel formation in the eastern Mediterranean
G. J. de Lange,H. L. ten Haven +1 more
TL;DR: In this paper, the authors report that the bottom water is strongly anoxic, whereas the sediment down to at least 400 cm is sapropel-to-sapropelic.
Journal ArticleDOI
Discovery of an anoxic basin within the Strabo Trench, eastern Mediterranean
D. Jongsma,A. R. Fortuin,W. Huson,Simon Troelstra,Gerard Th. Klaver,J. M. Peters,D. van Harten,G. J. de Lange,L. ten Haven +8 more
TL;DR: The Tyro Basin this paper is a basin in the eastern Mediterranean in which anoxic conditions exist and organic-rich sediments are accumulating, and bottom water samples show extremely high salt concentrations.
Journal ArticleDOI
Local submarine salt-karst formation on the Hellenic Outer Ridge, eastern Mediterranean
TL;DR: In this article, a region of the eastern Mediterranean dominated by compressional tectonic relief was detected as karst-like areas of collapse breccia (incorporating Messinian evaporites and Pliocene-Quaternary sediments) above surfaces of submarine salt dissolution.