Martinez-Ruiz, Francisca C; Kastner, Miriam; Paytan, Adina; Ortega-Huertas, M; Bernasconi, Stefano M (2000): Geochemistry on sapropel deposition in the eastern Mediterranean from cores TTR-GL94 and M25/4-KL11 [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.738508, Supplement to: Martinez-Ruiz, FC et al. (2000): Geochemical evidence for enhanced productivity during S1 sapropel deposition in the eastern Mediterranean. Paleoceanography, 15(2), 200-209, https://doi.org/10.1029/1999PA000419
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Abstract:
The geochemistry of the youngest Mediterranean sapropel layer suggests changes in productivity and water column oxygen conditions during sapropel deposition. The Ba-enriched interval is broader than the organic-carbon-rich interval of this sapropel. We suggest that the Ba-enriched horizon records the original thickness of the sapropel prior to subsequent partial oxidation. The main carrier of Ba is barite, as microcrystals (0.5-5 µm ) having a morphology characteristic of marine barite, particularly abundant beneath high productivity regions. Ba concentrations do not change at the sapropel layer oxidation front and diagenetic barite crystals are absent, thus the Ba-enriched layer reflects original oceanic conditions of increased biological productivity during sapropel deposition and not diagenetic Ba remobilization. Paleoredox indicators point to restricted oxygenated bottom water but not to fully anoxic conditions. Detrital elements within this layer indicate a lower eolian terrigenous input, enhanced humidity, and increased precipitation/runoff, thus likely higher nutrient supply.
Coverage:
Median Latitude: 36.416667 * Median Longitude: 19.842500 * South-bound Latitude: 36.087500 * West-bound Longitude: 17.717500 * North-bound Latitude: 36.745833 * East-bound Longitude: 21.967500
Event(s):
M25/4-KL11 (25/4-11) * Latitude: 36.745833 * Longitude: 17.717500 * Elevation: -3376.0 m * Penetration: 14 m * Recovery: 9.43 m * Campaign: M25/4 * Basis: Meteor (1986) * Method/Device: Piston corer (BGR type) (KL)
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
2 datasets
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Datasets listed in this publication series
- Martinez-Ruiz, FC; Kastner, M; Paytan, A et al. (2000): Geochemistry on sapropel deposition in the eastern Mediterranean from core M25/4-KL11. https://doi.org/10.1594/PANGAEA.738197
- Martinez-Ruiz, FC; Kastner, M; Paytan, A et al. (2000): Geochemistry on sapropel deposition in the eastern Mediterranean from core TTR-GL94. https://doi.org/10.1594/PANGAEA.738198