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Maillot, Henri; Robert, Christian (1984): Geochemistry at DSDP Leg 74 Holes [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.810508, Supplement to: Maillot, H; Robert, C (1984): Paleoenvironmental evolution of the Walvis Ridge deduced from inorganic geochemical and clay mineralogical data, Deep Sea Drilling Project Leg 74, Southeast Atlantic. In: Moore, TC Jr; Rabinowitz, PD; et al. (eds.), Initial Reports of the Deep Sea Drilling Project (U.S. Govt. Printing Office), 74, 663-683, https://doi.org/10.2973/dsdp.proc.74.119.1984

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Published: 1984 (exact date unknown) • DOI registered: 2013-05-20

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Abstract:
Clay mineralogical and inorganic geochemical data from the Campanian to the Pleistocene provide information bearing on the evolution of both continental and marine paleoenvironments in the Walvis Ridge area. (1) Alteration processes of basalts occurred under subaerial conditions during the Campanian and Maestrichtian and were virtually absent in deeper marine environments. (2) Strong tectonic effects were present during the Campanian and persisted until the early Eocene. (3) Subsidence of this part of the Walvis Ridge became important during the late Maestrichtian and continued into the Paleocene and Eocene. (4) The influence of global climatic cooling was evident from the late Eocene on. (5) Modification of oceanic circulation and the increasing influence of surface and deep water masses on the sedimentation characterized the Cenozoic.
Project(s):
Deep Sea Drilling Project (DSDP)
Coverage:
Median Latitude: -28.641188 * Median Longitude: 2.459175 * South-bound Latitude: -29.070700 * West-bound Longitude: 1.763300 * North-bound Latitude: -28.041500 * East-bound Longitude: 2.985300
Date/Time Start: 1980-06-10T00:00:00 * Date/Time End: 1980-07-18T00:00:00
Event(s):
74-525A * Latitude: -29.070700 * Longitude: 2.985300 * Date/Time: 1980-06-10T00:00:00 * Elevation: -2467.0 m * Penetration: 678.1 m * Recovery: 406.6 m * Location: South Atlantic/CREST * Campaign: Leg74 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 62 cores; 549.7 m cored; 6 m drilled; 74 % recovery
74-525B * Latitude: -29.070700 * Longitude: 2.985300 * Date/Time: 1980-06-10T00:00:00 * Elevation: -2467.0 m * Penetration: 285.6 m * Recovery: 181.3 m * Location: South Atlantic/CREST * Campaign: Leg74 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 52 cores; 227 m cored; 0 m drilled; 79.9 % recovery
74-527 * Latitude: -28.041500 * Longitude: 1.763300 * Date/Time: 1980-06-28T00:00:00 * Elevation: -4428.0 m * Penetration: 384.5 m * Recovery: 243.4 m * Location: South Atlantic Ocean * Campaign: Leg74 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 43 cores; 380 m cored; 4.5 m drilled; 64.1 % 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. Maillot, H; Robert, C (1984): (Table 1) Geochemistry at DSDP Site 74-525. https://doi.org/10.1594/PANGAEA.810496
  2. Maillot, H; Robert, C (1984): (Table 4) Geochemistry at DSDP Hole 74-527. https://doi.org/10.1594/PANGAEA.810503
  3. Maillot, H; Robert, C (1984): (Table 3) Geochemistry at DSDP Site 74-528. https://doi.org/10.1594/PANGAEA.810501
  4. Maillot, H; Robert, C (1984): (Table 2) Geochemistry at DSDP Hole 74-529. https://doi.org/10.1594/PANGAEA.810499