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Bougault, Henri; Joron, Jean Louis; Maury, R C; Bohn, Marcel; Tardy, M; Biju-Duval, Bernard (1984): Geochemistry and trace elements at DSDP Hole 78-543A [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.808824, Supplement to: Bougault, H et al. (1984): Basalts from the Atlantic Crust West of the Barbados Ridge (Site 543, Leg 78A): geochemistry and mineralogy. In: Biju-Duval, B; Moore, JC; et al. (eds.), Initial Reports of the Deep Sea Drilling Project (U.S. Govt. Printing Office), 78A, 401-408, https://doi.org/10.2973/dsdp.proc.78a.119.1984

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Abstract:
The upper part of the basaltic substratum of the Atlantic abyssal plain, approaching subduction beneath the Barbados Ridge and thus presumably beneath the Lesser Antilles island arc, is made of typical LREE-depleted oceanic tholeiites. Mineralogical (microprobe) and geochemical (X-ray fluorescence, neutron activation analyses) data are given for 12 samples from the bottom of Hole 543A, which is 3.5 km seaward of the deformation front of the Barbados Ridge complex. These basalts are overlain by a Quaternary to Maestrichtian-Campanian sedimentary sequence. Most of the basalts are relatively fresh (in spite of the alteration of olivine and development of some celadonite, clays, and chlorite in their groundmass), and their mineralogical and geochemical compositions are similar to those of LREE-depleted recent basalts from the Mid-Atlantic Ridge. The most altered samples occur at the top of the basaltic sequence, and show trends of enrichment in alkali metals typical of altered oceanic tholeiites.
Project(s):
Deep Sea Drilling Project (DSDP)
Coverage:
Latitude: 15.712300 * Longitude: -58.653700
Date/Time Start: 1981-02-28T00:00:00 * Date/Time End: 1981-02-28T00:00:00
Event(s):
78-543A * Latitude: 15.712300 * Longitude: -58.653700 * Date/Time: 1981-02-28T00:00:00 * Elevation: -5633.0 m * Penetration: 455 m * Recovery: 64.2 m * Location: North Atlantic/CONT RISE * Campaign: Leg78 (Leg78AB) * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 16 cores; 132.5 m cored; 0 m drilled; 48.5 % recovery
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
5 datasets

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Datasets listed in this publication series

  1. Bougault, H; Joron, JL; Maury, RC et al. (1984): (Table 1) Geochemistry and minerals in basalts at DSDP Hole 78-543A. https://doi.org/10.1594/PANGAEA.808819
  2. Bougault, H; Joron, JL; Maury, RC et al. (1984): (Table 3) Geochemistry in clinopyroxene at DSDP Hole 78-543A. https://doi.org/10.1594/PANGAEA.808821
  3. Bougault, H; Joron, JL; Maury, RC et al. (1984): (Table 4) Geochemistry in feldspars at DSDP Hole 78-543A. https://doi.org/10.1594/PANGAEA.808822
  4. Bougault, H; Joron, JL; Maury, RC et al. (1984): (Table 2) Geochemistry in magnesiochromite at DSDP Hole 78-543A. https://doi.org/10.1594/PANGAEA.808820
  5. Bougault, H; Joron, JL; Maury, RC et al. (1984): (Table 5) Trace elements at DSDP Hole 78-543A. https://doi.org/10.1594/PANGAEA.808823