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Herbin, Jean-Paul; Masure, Edwige; Roucaché, J (1987): Geochemical characterizations of the Cretaceous formations at DSDP Holes 93-603B and 11-105 [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.789175, Supplement to: Herbin, J-P et al. (1987): Cretaceous formations from the lower continental rise off Cape Hatteras: Organic geochemistry, dinoflagellate cysts, and the Cenomanian/Turonian boundary event at Sites 603 (Leg 93) and 105 (Leg 11). In: van Hinte, JE; Wise, SW Jr; et al. (eds.), Initial Reports of the Deep Sea Drilling Project, Washington (U.S. Govt. Printing Office), 93, 1139-1162, https://doi.org/10.2973/dsdp.proc.93.147.1987

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Abstract:
Geochemical characterizations of the Cretaceous formations at Site 603 are quite comparable with those at Site 105. In the Blake-Bahama and the Hatteras formations, the petroleum potential is medium (<5 kg HC/t of rock) to very low (<0.5 kg HC/t of rock), and the organic matter is mainly of type III origin, that is, terrestrial. At the top of the Hatteras Formation, there is a condensed series, which chiefly contains organic matter of type II origin, with up to 20 wt.% total organic carbon content in Core 603B-34 and 25 wt.% in Core 105-9. This accumulation corresponds to the Cenomanian/Turonian boundary event. An examination of dinoflagellates in the kerogen concentration assigns dates to the samples studied by organic geochemistry. The Cenomanian and Turonian age of the organic-matter-rich black claystones indicates a low rate of sedimentation, about 1 m/Ma. Furthermore, the occurrence of type II organic matter indicates an anoxic environment with insufficient oxygen renewal to oxidize the sinking hemipelagic organic matter. This organic enrichment is not related to local phenomena but to sedimentation over an extended area, because deposits are well known in various areas with different paleodepths in the North Atlantic.
Project(s):
Deep Sea Drilling Project (DSDP)
Coverage:
Median Latitude: 35.345225 * Median Longitude: -69.814700 * South-bound Latitude: 34.895300 * West-bound Longitude: -70.028500 * North-bound Latitude: 35.495200 * East-bound Longitude: -69.173300
Date/Time Start: 1970-05-13T00:00:00 * Date/Time End: 1983-05-05T00:00:00
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. Herbin, J-P; Masure, E; Roucaché, J (1987): (Table 2) Carbonate, organic carbon, hydrogen and oxygen index of sediments at DSDP Sections 11-105-9-2 to 11-105-9-6. https://doi.org/10.1594/PANGAEA.789171
  2. Herbin, J-P; Masure, E; Roucaché, J (1987): (Figure 7) Stratigraphic distribution of selected dinoflagellate species in DSDP Hole 93-603B. https://doi.org/10.1594/PANGAEA.789574
  3. Herbin, J-P; Masure, E; Roucaché, J (1987): (Table 1) Geochemistry, hydrogen and oxygen index, phytane, pyrite and ash free of pyrite of sediments at DSDP Hole 93-603B. https://doi.org/10.1594/PANGAEA.789168
  4. Herbin, J-P; Masure, E; Roucaché, J (1987): (Table 3) Carbonate, organic carbon, hydrogen and oxygen index of sediments at DSDP Sections 93-603B-34-1 to 93-603B-34-6 and 93-603B-35-1 to 93-603B-35-4. https://doi.org/10.1594/PANGAEA.789173