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Levitan, Mikhail A; Strizhov, Valentin P; Shevchenko, Alla Ya (1983): Geochemistry, SiO2 minerals and isotopes at DSDP Hole 72-516F [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.811395, Supplement to: Levitan, MA et al. (1983): Cherts from the Rio Grande Rise sediments, Deep Sea Drilling Project Leg 72, Hole 516F. In: Barker, PF; Carlson, RL; Johnson, DA; et al. (eds.), Initial Reports of the Deep Sea Drilling Project (U.S. Govt. Printing Office), 72, 443-447, https://doi.org/10.2973/dsdp.proc.72.113.1983

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Abstract:
Cherts recovered during DSDP Leg 72 from Rio Grande Rise sediments (Site 516) consist of both cristobalite and quartz, and contain ghosts of foraminifers and (more rare) radiolarians. Porcelanite made of disordered cristobalite is found in most old enclosing sediments. Local dissolution of siliceous microfossils during diagenesis is the most likely source of the silica required for the chert formation. As sediment age increases, the proportion of biogenic silica decreases and authigenic silica increases.
Project(s):
Deep Sea Drilling Project (DSDP)
Coverage:
Latitude: -30.276500 * Longitude: -35.285000
Date/Time Start: 1980-03-11T00:00:00 * Date/Time End: 1980-03-11T00:00:00
Event(s):
72-516F * Latitude: -30.276500 * Longitude: -35.285000 * Date/Time: 1980-03-11T00:00:00 * Elevation: -1313.0 m * Penetration: 1270.6 m * Recovery: 690.1 m * Location: South Atlantic/CONT RISE * Campaign: Leg72 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 127 cores; 1092.5 m cored; 9 m drilled; 63.2 % 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. Levitan, MA; Strizhov, VP; Shevchenko, AY (1983): (Table 1) Chemical composition of cherts and porcellanites at DSDP Hole 72-516F. https://doi.org/10.1594/PANGAEA.811392
  2. Levitan, MA; Strizhov, VP; Shevchenko, AY (1983): (Table 3) Isotopes of carbon and oxygen in chert carbonates at DSDP Hole 72-516F. https://doi.org/10.1594/PANGAEA.811394
  3. Levitan, MA; Strizhov, VP; Shevchenko, AY (1983): (Table 2) Ratios of main peak heights of SiO2 minerals on diffractograms of cherts at DSDP Hole 72-516F. https://doi.org/10.1594/PANGAEA.811393