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Klaver, G T; van Kempen, Th MG; Bianchi, F; van der Gaast, Sjerry J (1987): Natural oxides, elements and remanent magnetization intensities and directions at DSDP Hole 93-603B [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.789118, Supplement to: Klaver, GT et al. (1987): Green spherules as indicators of the Cretaceous/Tertiary boundary in Deep Sea Drilling Project Hole 603B. 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, 1039-1056, https://doi.org/10.2973/dsdp.proc.93.142.1987

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Abstract:
Dark green spherules occur in the lower part of a turbidite in Section 603B-22-3, at the 70 cm level. In all probability these spherules originally consisted of massive glass, but now appear to have become completely altered into smectite. The presence of numerous microscopic fissures in the spherules probably mediated in the alteration process.
Judging by the presence of similar spherules at the Cretaceous/Tertiary (K/T) boundary in DSDP Hole 390B, the green spherules are thought to represent diagenetically altered impact ejecta from one large or several smaller extraterrestrial objects at the end of the Cretaceous. The presence of anomalously high concentrations of Ni, Co, and As higher up in the turbidite are in agreement with an expected enrichment of these elements in the K/T boundary clay. However, precise Ir analyses are necessary in order to confirm this.
Project(s):
Deep Sea Drilling Project (DSDP)
Coverage:
Latitude: 35.495200 * Longitude: -70.028500
Date/Time Start: 1983-05-05T00:00:00 * Date/Time End: 1983-05-05T00:00:00
Event(s):
93-603B * Latitude: 35.495200 * Longitude: -70.028500 * Date/Time: 1983-05-05T00:00:00 * Elevation: -4633.0 m * Penetration: 1576.2 m * Recovery: 485.6 m * Campaign: Leg93 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 74 cores; 674.6 m cored; 0 m drilled; 72 % recovery
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
3 datasets

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Datasets listed in this publication series

  1. Klaver, GT; van Kempen, TMG; Bianchi, F et al. (1987): (Appendix Table 1) Initial total natural remanent magnetization intensities and directions at DSDP Hole 93-603B. https://doi.org/10.1594/PANGAEA.789117
  2. Klaver, GT; van Kempen, TMG; Bianchi, F et al. (1987): (Table 2) Elements at DSDP Section 93-603B-22-3. https://doi.org/10.1594/PANGAEA.789116
  3. Klaver, GT; van Kempen, TMG; Bianchi, F et al. (1987): (Table 1) Natural oxides and cations of montmorillonite for DSDP Sample 93-603B-22-3,66-72. https://doi.org/10.1594/PANGAEA.789115