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Michel, Helen V; Asaro, Frank; Alvarez, Walter; Alvarez, Luis W (1981): Geochemisty at DSDP Hole 62-465A [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.819742, Supplement to: Michel, HV et al. (1981): Distribution of iridium and other elements near the Cretaceous/Tertiary boundary in Hole 465A: Preliminary results. In: Thiede, J; Vallier, TL; et al. (eds.), Initial Reports of the Deep Sea Drilling Project (U.S. Govt. Printing Office), 62, 847-849, https://doi.org/10.2973/dsdp.proc.62.139.1981

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Abstract:
Very significant enhancements of the element iridium have been observed in association with the Cretaceous/ Tertiary boundary in marine sediments laid down 65 m.y. ago and subsequently uplifted above the ocean's surface. If our hypothesis for the origin of the iridium and the cause of the Cretaceous/Tertiary life extinctions (the asteroid-impact theory) (Alvarez et al., 1980) is correct, the Ir anomaly should be associated with the Cretaceous/ Tertiary boundary region wherever it is intact. The present work was undertaken to search for the Ir anomaly in a deep-sea-drilling core, in order to check this aspect of the asteroid-impact theory.
Project(s):
Deep Sea Drilling Project (DSDP)
Coverage:
Latitude: 33.820500 * Longitude: 178.919000
Date/Time Start: 1978-08-23T00:00:00 * Date/Time End: 1978-08-23T00:00:00
Event(s):
62-465A * Latitude: 33.820500 * Longitude: 178.919000 * Date/Time: 1978-08-23T00:00:00 * Elevation: -2161.0 m * Penetration: 476 m * Recovery: 98.9 m * Location: North Pacific/CONT RISE * Campaign: Leg62 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 43 cores; 408.5 m cored; 9.5 m drilled; 24.2 % 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. Michel, HV; Asaro, F; Alvarez, W et al. (1981): (Table 2) Major-element, bromine, and strontium abundances at DSDP Hole 62-465A. https://doi.org/10.1594/PANGAEA.819738
  2. Michel, HV; Asaro, F; Alvarez, W et al. (1981): (Table 5) Abundances of other elements enhanced by over a factor of 10 in the pyrite-containing fractions, relative to the Cretaceous calcareous at DSDP Hole 62-465A. https://doi.org/10.1594/PANGAEA.819741
  3. Michel, HV; Asaro, F; Alvarez, W et al. (1981): (Table 4) Abundances of elements enhanced by over a factor of 100 in the pyrite-containing fractions, relative to the Cretaceous calcareous at DSDP Hole 62-465A. https://doi.org/10.1594/PANGAEA.819740
  4. Michel, HV; Asaro, F; Alvarez, W et al. (1981): (Table 3) Rare-earth elements, barium, and scandium abundances at DSDP Hole 62-465A. https://doi.org/10.1594/PANGAEA.819739