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Ogg, James G; Robertson, Alastair H F; Jansa, Lubomir F (1983): Jurassic sedimentation history at DSDP Hole 76-534A [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.810029, Supplement to: Ogg, JG et al. (1983): Jurassic sedimentation history of Site 534 (western North Atlantic) and of the Atlantic-Tethys Seaway. In: Sheridan, RE; Gradstein, FM; et al. (eds.), Initial Reports of the Deep Sea Drilling Project (U.S. Govt. Printing Office), 76, 829-884, https://doi.org/10.2973/dsdp.proc.76.141.1983

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Abstract:
Site 534 reflects a complex interplay of global, basinal, and local influences on sedimentation during the Callovian and Late Jurassic. Rifting and rapid subsidence of the continental margins of the North Atlantic-Tethys seaway occurred during the late Early Jurassic (Sinemurian-Pliensbachian), but rapid spreading between the North American margin (Blake Spur Ridge and magnetic lineation) and the northwest African margin did not commence until the Bathonian or earliest Callovian.
Site 534, drilled on marine magnetic anomaly "M-28" of Bryan et al. (1980), was initially about 150 km from either continental margin. The ?middle Callovian basal sediments are dusky red silty marl. Callovian transgression led to active carbonate platforms on the margin, recorded at Site 534 as a rise in the CCD (carbonate compensation depth), then arrival of lime-rich turbidites from the Blake Plateau platform across the Blake Spur Ridge. The host pelagic sediment is greenish black, organic-rich, radiolarian-rich, silty claystone. Hydrothermal activity on the nearby spreading ridge enriched this lower unit in metals. In the Oxfordian, the input of terrestrial silt rapidly diminished; radiolarians or other bioclasts were not preserved. The dark variegated claystone has fine-grained marl and reddish claystone turbidite beds. The late Callovian-Oxfordian Western Tethys has radiolarian chert deposition, marine hiatuses, or organic-rich sediments.
The Kimmeridgian and Tithonian had a stable or receding sea level. Near the end of the Jurassic many of the carbonate platforms of the margins were buried beneath prograding fan or alluvial deposits. Carbonate deposition shifted to the deep sea. Site 534 records the deepening of the CCD and ACD (aragonite compensation depth) during the Kimmeridgian and early Tithonian, then a rise of the ACD in the middle Tithonian. Similar trends occurred throughout the Western Tethys-Atlantic. High nannofossil productivity of the seaway led to deposition of very widespread white micritic limestone in the late Tithonian-Berriasian. The underlying sediment had a slower deposition rate of carbonate, therefore its higher clay and associated Fe content produced a red marl. A short sea-level incursion occurred on the Atlantic margins during the Kimmeridgian and is reflected in the Site 534 greenish gray marl unit by numerous turbidite beds of shallow-water carbonates.
Project(s):
Deep Sea Drilling Project (DSDP)
Coverage:
Latitude: 28.343300 * Longitude: -75.381700
Date/Time Start: 1980-10-21T00:00:00 * Date/Time End: 1980-10-21T00:00:00
Event(s):
76-534A * Latitude: 28.343300 * Longitude: -75.381700 * Date/Time: 1980-10-21T00:00:00 * Elevation: -4971.0 m * Penetration: 1666.5 m * Recovery: 612.4 m * Location: North Atlantic/BASIN * Campaign: Leg76 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 127 cores; 1113.1 m cored; 31.5 m drilled; 55 % recovery
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
9 datasets

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Datasets listed in this publication series

  1. Ogg, JG; Robertson, AHF; Jansa, LF (1983): (Table 2) Geochemistry at DSDP Hole 76-534A basal sediments (on a CO3-free basis) and lithology. https://doi.org/10.1594/PANGAEA.810020
  2. Ogg, JG; Robertson, AHF; Jansa, LF (1983): (Table 4) Geochemistry of Cat Gap formation at DSDP Hole 76-534A samples (on a CO3-free basis). https://doi.org/10.1594/PANGAEA.810022
  3. Ogg, JG; Robertson, AHF; Jansa, LF (1983): (Table 1) Microfacies of Callovian claystone marl at DSDP Hole 76-534A. https://doi.org/10.1594/PANGAEA.810019
  4. Ogg, JG; Robertson, AHF; Jansa, LF (1983): (Table 5) Microfacies of Kimmeridgian-?Oxfordian marls at DSDP Hole 76-534A. https://doi.org/10.1594/PANGAEA.810024
  5. Ogg, JG; Robertson, AHF; Jansa, LF (1983): (Table 6) Microfacies at DSDP Hole 76-534A Tithonian red marls. https://doi.org/10.1594/PANGAEA.810025
  6. Ogg, JG; Robertson, AHF; Jansa, LF (1983): (Table 9) Microfacies of DSDP Hole 76-534A bioclastic pelsparite turbidites (Kimmeridgian-?Oxfordian). https://doi.org/10.1594/PANGAEA.810028
  7. Ogg, JG; Robertson, AHF; Jansa, LF (1983): (Table 7) Microfacies of DSDP Hole 76-534A lime-rich turbidites (Oxfordian-late Callovian). https://doi.org/10.1594/PANGAEA.810026
  8. Ogg, JG; Robertson, AHF; Jansa, LF (1983): (Table 8) Microfacies of DSDP Hole 76-534A micrite turbidites (?Tithonian-Oxfordian). https://doi.org/10.1594/PANGAEA.810027
  9. Ogg, JG; Robertson, AHF; Jansa, LF (1983): (Table 3) Microfacies of DSDP Hole 76-534A Oxfordian claystones. https://doi.org/10.1594/PANGAEA.810021