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Thurow, Juergen W; Moullade, Michel; Brumsack, Hans-Jürgen; Masure, Edwige; Taugourdeau-Lantz, Josette; Dunham, Keith W (1988): The Cenomanian/Turronian Boundary Event at ODP Hole 103-641A [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.743476, Supplement to: Thurow, JW et al. (1988): The Cenomanian/Turonian Boundary Event (CTBE) at Hole 641A, ODP Leg 103 (Compared with the CTBE interval at Site 398). In: Boillot, G; Winterer, EL; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 103, 587-634, https://doi.org/10.2973/odp.proc.sr.103.172.1988

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Abstract:
Drilling at ODP Site 641 (on the western margin of Galicia Bank, off northwestern Spain) revealed a thin, but pronounced, interval of black shale and gray-green claystone. Our high-resolution study combines the sedimentology, micropaleontology (palynomorphs and others), organic and inorganic geochemistry, and isotopic values of this layer to demonstrate the distinct nature of the sediment and prove that the sequence represents the local sedimentary expression of the global Cenomanian/Turonian Oceanic Anoxic Event (OAE) of Schlanger and Jenkyns (1976), Arthur and Schlanger (1979), and Jenkyns (1980), also called the Cenomanian/Turonian Boundary Event (CTBE).
The most striking evidence is that the strong positive d13C excursion characterizing the CTBE sequences in shallow areas can be traced into a pronounced deep-sea expression, thus providing a good stratigraphic marker for the CTBE in various paleosettings. The isotopic excursion at Site 641 coincides with an extremely enriched trace metal content, with values that were previously unknown for the Cretaceous Atlantic. Similar to other CTBE occurrences, the organic carbon content is high (up to 11%) and the organic matter is of dominantly marine origin (kerogen type II).
The bulk mineralogy of the CTBE sediments does not differ significantly from the general trend of Cretaceous North Atlantic sediments (dominance of smectite and zeolite with minor amounts of illite and scattered palygorskite, kaolinite, and chlorite); thus, no evidence for either increased volcanic activity nor a drastic climatic change in the borderlands was found.
Results from Site 641 are compared with the CTBE section found at Site 398, DSDP Leg 47B (Vigo Seamount at the southern end of the Galicia Bank).
Project(s):
Deep Sea Drilling Project (DSDP)
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: 41.898929 * Median Longitude: -11.868114 * South-bound Latitude: 40.960000 * West-bound Longitude: -12.181700 * North-bound Latitude: 42.155000 * East-bound Longitude: -10.718300
Date/Time Start: 1976-04-14T00:00:00 * Date/Time End: 1985-06-15T13:30:00
Event(s):
47-398D * Latitude: 40.960000 * Longitude: -10.718300 * Date/Time: 1976-04-14T00:00:00 * Elevation: -3910.0 m * Penetration: 1740 m * Recovery: 928.4 m * Location: North Atlantic/SEAMOUNT * Campaign: Leg47 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 135 cores; 1269 m cored; 28.5 m drilled; 73.2 % recovery
103-641A * Latitude: 42.155000 * Longitude: -12.181700 * Date/Time Start: 1985-06-08T03:30:00 * Date/Time End: 1985-06-10T14:30:00 * Elevation: -4646.0 m * Penetration: 63.6 m * Recovery: 40.37 m * Location: South Atlantic Ocean * Campaign: Leg103 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 7 cores; 63.6 m cored; 0 m drilled; 63.5 % recovery
103-641C * Latitude: 42.155000 * Longitude: -12.181700 * Date/Time Start: 1985-06-11T10:45:00 * Date/Time End: 1985-06-15T13:30:00 * Elevation: -4650.0 m * Penetration: 305.2 m * Recovery: 112.48 m * Location: South Atlantic Ocean * Campaign: Leg103 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 16 cores; 154.2 m cored; 0 m drilled; 72.9 % recovery
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
7 datasets

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Datasets listed in this publication series

  1. Thurow, JW; Moullade, M; Brumsack, H-J et al. (1988): (Table 5) Stratigraphic distribution of spores and pollen grains in the transition interval between the Hatteras Formation and the Plantagenet Formation at DSDP Hole 47-398D. https://doi.org/10.1594/PANGAEA.743463
  2. Thurow, JW; Moullade, M; Brumsack, H-J et al. (1988): (Table 4) Stratigraphic distribution of spores and pollen grains in the transition interval between the Hatteras Formation and the Plantagenet Formation at ODP Site 103-641. https://doi.org/10.1594/PANGAEA.743462
  3. Thurow, JW; Moullade, M; Brumsack, H-J et al. (1988): (Table 1) Description of CTBE samples from ODP Hole 103-641A and DSDP Hole 43-398D. https://doi.org/10.1594/PANGAEA.743472
  4. Thurow, JW; Moullade, M; Brumsack, H-J et al. (1988): (Table 2) Compilation of biostratigraphy and organic geochemistry studies at ODP Hole 103-641A. https://doi.org/10.1594/PANGAEA.743475
  5. Thurow, JW; Moullade, M; Brumsack, H-J et al. (1988): (Table 3) Distribution of dinoflagellate cysts in ODP Hole 103-641A. https://doi.org/10.1594/PANGAEA.743459
  6. Thurow, JW; Moullade, M; Brumsack, H-J et al. (1988): (Table 6) Relative abundance of pollen grains and spores at ODP Hole 103-641A. https://doi.org/10.1594/PANGAEA.743478
  7. Thurow, JW; Moullade, M; Brumsack, H-J et al. (1988): (Appendix A) Trace metal content of sediments around the CTBE at ODP Hole 103-641A. https://doi.org/10.1594/PANGAEA.743477