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Baker, Earl W; Louda, William (1985): Porphyrin geochemistry of DSDP Hole 71-511 [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.763295, Supplement to: Baker, EW; Louda, W (1985): Porphyrin geochemistry of Atlantic Jurassic-Cretaceous black shales. Organic Geochemistry, 10(4-6), 905-914, https://doi.org/10.1016/S0146-6380(86)80028-6

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Abstract:
Late Jurassic-early Cretaceous black shales and an overlying sequence of Albian-Campanian zeolitic claystones from the Falkland Plateau (DSDP/IPOD Leg 71, Site 511) were analyzed for tetrapyrrole pigment type and abundance. The “black shale” sequence was found to be rich in DPEP-series dominated free-base, nickel (Ni) and, to a lesser extent, vanadyl (V = 0) porphyrins. A low level of organic maturity (i.e. precatagenesis) is indicated for these strata as nickel chelation by free-base porphyrins is only 50–75% complete, proceeding down-hole to 627 meters sub-bottom. Electronic and mass spectral data reveal that the proposed benzo-DPEP (BD) and tetrahydrobenzo-DPEP (THBD) series are present in the free-base and Ni species, as well as the more usual occurrence in V = 0 porphyrin arrays. Highly reducing conditions are suggested by an abundance of the PAH perylene, substantial amounts of the THBD/BD series and a redox equilibrium between free-base DPEP and 7,8-dihydro-DPEP series, which exist in a 7:1 molar ratio. The Albian-Campanian claystone strata were found to be tetrapyrrolepoor, and those pigments present were typed as Cu/Ni highly dealkylated (C26 max.) etioporphyrins, thought to be derived via redeposition and oxidation of terrestrial organic matter (OM). Results from the present study are correlated to our past analyses of Jurassic-Cretaceous sediments from Atlantic margins in an effort to relate tetrapyrrole quality and quantity to basin evolution and OM sources in the proto-Atlantic.
Related to:
Deroo, Gerard; Herbin, Jean-Paul; Roucaché, J (1983): Organic geochemistry of upper Jurassic–Cretaceous sediments from Site 511, Leg 71, western South Atlantic. In: Ludwig, WJ; Krasheninnikov, VA; et al. (eds.), Initial Reports of the Deep Sea Drilling Project (U.S. Govt. Printing Office), 71, 1001-1013, https://doi.org/10.2973/dsdp.proc.71.137.1983
von der Dick, Hans; Rullkötter, Jürgen; Welte, Dietrich Hugo (1983): Content, type, and thermal evolution of organic matter in sediments from the eastern Falkland Plateau, Deep Sea Drilling Project, Leg 71. In: Ludwig, WF; Krasheninnikov, VA; et al. (eds.), Initial Reports of the Deep Sea Drilling Project, Washington (U.S. Government Print Office), 71, 1015-1032, https://doi.org/10.2973/dsdp.proc.71.138.1983
Weaver, F M; von der Dick, Hans; Usher, John L; Salloway, J; Robert, Christian; Goldstein, E H; Ciesielski, Paul F; Bornhold, Brian D; Bloemendal, Jan; Bayer, Ulf; Basov, Ivan A; Ludwig, Wolfgang; Krasheninnikov, Valery A; Wise, Sherwood W (1983): Initial Reports of the Deep Sea Drilling Project. U. S. Government Printing Office, LXXI, 999 pp + 477 pp, https://doi.org/10.2973/dsdp.proc.71.1983
Project(s):
Deep Sea Drilling Project (DSDP)
Coverage:
Latitude: -51.004700 * Longitude: -46.971700
Date/Time Start: 1980-01-15T00:00:00 * Date/Time End: 1980-01-15T00:00:00
Event(s):
71-511 * Latitude: -51.004700 * Longitude: -46.971700 * Date/Time: 1980-01-15T00:00:00 * Elevation: -2589.0 m * Penetration: 632 m * Recovery: 384.4 m * Location: South Atlantic/PLATEAU * Campaign: Leg71 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 68 cores; 616.5 m cored; 14.5 m drilled; 62.4 % recovery
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
4 datasets

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Datasets listed in this publication series

  1. Baker, EW; Louda, W (1985): (Table 4) Mass spectra of metal-lophorphyrins isolated from DSDP Hole 71-511. https://doi.org/10.1594/PANGAEA.763358
  2. Baker, EW; Louda, W (1985): (Table 1) Pigment yields in DSDP Hole 71-511. https://doi.org/10.1594/PANGAEA.763293
  3. Baker, EW; Louda, W (1985): (Table 3) Mass spectra of free-base porphyrins isolated from DSDP Hole 71-511. https://doi.org/10.1594/PANGAEA.763357
  4. Baker, EW; Louda, W (1985): (Table 2) Tetrapyrrole pigment classes separated from DSDP Hole 71-511 samples. https://doi.org/10.1594/PANGAEA.763294