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  • 160-964D; 160-964E; 160-966C; 160-967C; 160-969E; Accumulation rate, total organic carbon; AGE; Barium; Cadmium; Carbon, organic, total; Code; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Eastern Basin; Enrichment factor; Event label; Isorenieratene derivative; Joides Resolution; Leg160; Molybdenum; Nickel; Ocean Drilling Program; ODP; Sample code/label; Selenium; Sulfur of pyrite; Vanadium; δ34S, pyrite  (1)
  • 201-1225A; 201-1226B; 201-1227A; 201-1227D; 201-1228A; 201-1228C; 201-1229A; 201-1231B; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Event label; Isotope ratio monitoring (IRM) mass spectrometry; Joides Resolution; Leg201; North Pacific Ocean; Ocean Drilling Program; ODP; Sample code/label; South Pacific Ocean; δ34S, sulfate  (1)
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  • 1
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    (Table 1) Geochemistry of Sapropels of the Mediterranean Sea (1997)
    PANGAEA
    In:  Supplement to: Passier, Hilde F; Bosch, Hendrik-Jan; Nijenhuis, Ivar A; Lourens, Lucas Joost; Böttcher, Michael Ernst; Leenders, Anke; Sinninghe Damsté, Jaap S; de Lange, Gert J; de Leeuw, Jan W (1999): Sulphidic Mediterranean surface waters during Pliocene sapropel formation. Nature, 397(6715), 146-149, https://doi.org/10.1038/16441
    Details
    Publication Date: 2024-01-09
    Description: Sapropels -organic-matter rich layers- are common in Neogene sediments of the eastern Mediterranean Sea. The formation of these layers has been attributed to climate-related increases in organic-matter production (Calvert et al., 1992, doi:10.1038/359223a0; Rossignol-Strick et al., 1982, doi:10.1038/295105a0; Rohling, 1994, doi:10.1016/0025-3227(94)90202-X) and increased organic-matter preservation due to oxygen depletion in more stagnant bottom waters (Rossignol-Strick et al., 1982, doi:10.1038/295105a0; Rohling, 1994, doi:10.1016/0025-3227(94)90202-X). Here we report that eastern Mediterranean Pliocene sapropels (Emeis et al., 1996, doi:10.2973/odp.proc.ir.160.102.1996) contain molecular fossils of a compound (isorenieratene) known to be synthesized by photosynthetic green sulphur bacteria, suggesting that sulphidic (euxinic) -and therefore anoxic- conditions prevailed in the photic zone of the water column. These sapropels also have a high trace-metal content, which is probably due to the efficient scavenging of these metals by precipitating sulphides in a euxinic water column. The abundance and sulphur-isotope composition of pyrite are consistent with iron sulphide formation in the water column. We conclude that basin-wide water-column euxinia occurred over substantial periods during Pliocene sapropel formation in the eastern Mediterranean Sea, and that the ultimate degradation of the increased organic-matter production was strongly influential in generating and sustaining the euxinic conditions.
    Keywords: 160-964D; 160-964E; 160-966C; 160-967C; 160-969E; Accumulation rate, total organic carbon; AGE; Barium; Cadmium; Carbon, organic, total; Code; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Eastern Basin; Enrichment factor; Event label; Isorenieratene derivative; Joides Resolution; Leg160; Molybdenum; Nickel; Ocean Drilling Program; ODP; Sample code/label; Selenium; Sulfur of pyrite; Vanadium; δ34S, pyrite
    Type: Dataset
    Format: text/tab-separated-values, 145 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 2
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    (Table T2) Sulfur isotopes of pore water from ODP Leg 201 sites (2006)
    PANGAEA
    In:  Supplement to: Böttcher, Michael Ernst; Ferdelman, Timothy G; Jørgensen, Bo Barker; Blake, Ruth E; Surkov, Alexander V; Claypool, George E (2006): Sulfur isotope fractionation by the deep biosphere within sediments of the eastern equatorial Pacific and Peru margin. In: Jørgensen, BB; D'Hondt, SL; Miller, DJ (eds.) Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 201, 1-21, https://doi.org/10.2973/odp.proc.sr.201.109.2006
    Details
    Publication Date: 2024-01-20
    Description: Fifty-seven interstitial water samples from six sites (Ocean Drilling Program Sites 1225-1229 and 1231) in the eastern equatorial Pacific Ocean and the Peru margin were analyzed for the stable sulfur isotopic composition (34S/32S) of dissolved sulfate along with major and minor ions. With the exception of Site 1231, sulfate from the interstitial fluids (d34S values as much as 89 per mil vs. the SF6-based Vienna-Canyon Diablo troilite standard) is found at depth to be enriched in 34S with respect to modern seawater sulfate (d34S = ~21 per mil), indicating that microbial sulfate reduction (MSR) took place to different extents at all investigated sites. Deeper sediments at Sites 1228 and 1229 are additionally influenced by diffusion of a sulfate-rich brine that has already undergone sulfate reduction. The intensity of MSR depends on the availability of substrate (organic matter), sedimentation conditions, and the active bacterial community structure. Formation of isotopically heavy diagenetic barite at the sulfate-methane transition zone is expected at Sites 1227 (one front), 1229 (two fronts), and probably Site 1228. At Site 1231, the constant sulfur isotopic composition of sulfate and concentrations of minor pore water ions indicate that suboxic (essentially iron and manganese oxide based) diagenesis dominates and no net MSR occurs.
    Keywords: 201-1225A; 201-1226B; 201-1227A; 201-1227D; 201-1228A; 201-1228C; 201-1229A; 201-1231B; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Event label; Isotope ratio monitoring (IRM) mass spectrometry; Joides Resolution; Leg201; North Pacific Ocean; Ocean Drilling Program; ODP; Sample code/label; South Pacific Ocean; δ34S, sulfate
    Type: Dataset
    Format: text/tab-separated-values, 112 data points
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    DATA PANGAEA
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