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Gallego-Torres, David; Martinez-Ruiz, Francisca C; de Lange, Gert J; Jiménez-Espejo, Francisco Jose; Ortega-Huertas, M (2010): Sapropels in the Mediterranean Sea [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.777777, Supplement to: Gallego-Torres, D et al. (2010): Trace-elemental derived paleoceanographic and paleoclimatic conditions for Pleistocene Eastern Mediterranean sapropels. Palaeogeography, Palaeoclimatology, Palaeoecology, 293(1-2), 76-89, https://doi.org/10.1016/j.palaeo.2010.05.001

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Abstract:
Eastern Mediterranean sediments are characterized by cyclic deposition of organic-rich sediments known as sapropels. Enhanced primary productivity combined with bottom water oxygen depletion are thought to be the main drivers for sapropel deposition. We selected sapropel layers from a suite of ODP-Leg 160 cores, and applied a set of geochemical proxies to determine paleo-productivity variations, redox conditions of the water column during deposition, and provenance of detrital material.
High sedimentary Ba/Al and Corg contents indicate enhanced primary production, whereas the sedimentary La/Lu ratio, points to an enhanced contribution from a North African riverine source, during sapropel formation. These features are especially pronounced on Sapropels S5 and S7, deposited during a particularly warm climatic interval. This indicates a more intense North African drainage/weathering and consequently run-off for those sapropels that have the most enhanced expression of productivity too. Correspondingly, the latter has also resulted in bottom water redox conditions that have been more severe during these sapropels than during others.
Deepwater formation from Adriatic and Aegean areas, thought to be mainly controlled by sustained cooling of preconditioned surface waters, triggers the onset of bottomwater ventilation, thus sapropel duration. Our data, therefore, suggest that the intensity of sapropel formation is determined by the North African monsoonal system, whereas their duration is directed by northern borderlands climatic conditions.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: 34.975792 * Median Longitude: 25.588537 * South-bound Latitude: 33.796583 * West-bound Longitude: 17.750433 * North-bound Latitude: 36.260533 * East-bound Longitude: 32.725433
Date/Time Start: 1995-03-17T00:00:00 * Date/Time End: 1995-04-16T00:00:00
Event(s):
160-964 * Latitude: 36.260533 * Longitude: 17.750433 * Date/Time Start: 1995-03-17T00:00:00 * Date/Time End: 1995-03-21T00:00:00 * Elevation: -3659.0 m * Penetration: 531.1 m * Recovery: 512.3 m * Location: Eastern Basin * Campaign: Leg160 * Basis: Joides Resolution * Method/Device: Composite Core (COMPCORE) * Comment: 55 cores; 498.6 m cored; 0 m drilled; 102.8% recovery
160-966 * Latitude: 33.796583 * Longitude: 32.701267 * Date/Time Start: 1995-03-27T00:00:00 * Date/Time End: 1995-04-01T00:00:00 * Elevation: -925.8 m * Penetration: 880.8 m * Recovery: 451.6 m * Location: Eastern Basin * Campaign: Leg160 * Basis: Joides Resolution * Method/Device: Composite Core (COMPCORE) * Comment: 98 cores; 821.8 m cored; 0 m drilled; 55% recovery
160-967 * Latitude: 34.069600 * Longitude: 32.725433 * Date/Time Start: 1995-04-01T00:00:00 * Date/Time End: 1995-04-03T00:00:00 * Elevation: -2553.2 m * Penetration: 1003.2 m * Recovery: 487.4 m * Location: Eastern Basin * Campaign: Leg160 * Basis: Joides Resolution * Method/Device: Composite Core (COMPCORE) * Comment: 97 cores; 891.3 m cored; 0 m drilled; 54.7% recovery
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
3 datasets

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Datasets listed in this publication series

  1. Gallego-Torres, D; Martinez-Ruiz, FC; de Lange, GJ et al. (2010): (Table 3) Average La/Lu ratios for each sapropel in the Mediterranean Sea. https://doi.org/10.1594/PANGAEA.777776
  2. Gallego-Torres, D; Martinez-Ruiz, FC; de Lange, GJ et al. (2010): (Table 2b) Calculated ages and linear sedimentation rates of sapropels in the Mediterranean Sea. https://doi.org/10.1594/PANGAEA.777775
  3. Gallego-Torres, D; Martinez-Ruiz, FC; de Lange, GJ et al. (2010): (Table 1) Sapropels and i-cycles in the Mediterranean Sea. https://doi.org/10.1594/PANGAEA.777773