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Karpoff, Anne Marie; Peterschmitt, Irene; Hoffert, Michel (1980): Description and geochemistry of DSDP Leg 55 Holes [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.823277, Supplement to: Karpoff, AM et al. (1980): Mineralogy and geochemistry of sedimentary deposits on emperor seamounts, Sites 430, 431, and 432: Authigenesis of silicates, phosphates, and ferromanganese oxides. In: Jackson, ED; Koisumi, I; et al., (eds.), Initial Reports of the Deep Sea Drilling Project (U.S. Govt. Printing Office), 55, 463-489, https://doi.org/10.2973/dsdp.proc.55.117.1980

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Abstract:
One of the objectives of Leg 55 was to investigate the Tertiary history of sedimentation and environment on the Emperor Seamounts after their volcanic activity. For the three first sites, 430, 431, and 432, drilled on Ojin, Nintoku, and Yömei Seamounts, the Neogene sedimentary deposits are not well represented and are not typical pelagic sediments. Except for two holes (430A and 432), where we found calcareous oozes, the sediments are heterogeneous sands, gravels, and pebbly mudstones with a wide range in grain size and composition. Two phenomena characterize these deposits: the inheritance of volcaniclastic material and its alteration, and the authigenesis of secondary minerals including silicates, phosphates, and ferromanganese oxides formed under volcanic influence in a marine environment.
Project(s):
Deep Sea Drilling Project (DSDP)
Coverage:
Median Latitude: 40.031480 * Median Longitude: 170.528660 * South-bound Latitude: 37.981300 * West-bound Longitude: 170.379000 * North-bound Latitude: 42.424000 * East-bound Longitude: 170.597700
Date/Time Start: 1977-08-01T00:00:00 * Date/Time End: 1977-08-06T00:00:00
Event(s):
55-430 * Latitude: 37.981300 * Longitude: 170.590800 * Date/Time: 1977-08-01T00:00:00 * Elevation: -1445.0 m * Penetration: 14 m * Recovery: 7.7 m * Location: North Pacific/SEDIMENT POND * Campaign: Leg55 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 2 cores; 11.5 m cored; 2.5 m drilled; 67 % recovery
55-430A * Latitude: 37.988200 * Longitude: 170.597700 * Date/Time: 1977-08-01T00:00:00 * Elevation: -1479.0 m * Penetration: 118 m * Recovery: 18.3 m * Location: North Pacific/SEDIMENT POND * Campaign: Leg55 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 9 cores; 59 m cored; 28.5 m drilled; 31.1 % recovery
55-431 * Latitude: 42.424000 * Longitude: 170.544700 * Date/Time: 1977-08-05T00:00:00 * Elevation: -1704.0 m * Penetration: 9.5 m * Recovery: 3.3 m * Location: North Pacific/TERRACE * Campaign: Leg55 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 2 cores; 19 m cored; 0 m drilled; 17.5 % 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. Karpoff, AM; Peterschmitt, I; Hoffert, M (1980): (Table 1) Lithologic description and mineralogy at DSDP Leg 55 Holes. https://doi.org/10.1594/PANGAEA.823273
  2. Karpoff, AM; Peterschmitt, I; Hoffert, M (1980): (Table 2) Major elements at DSDP Leg 55 Holes. https://doi.org/10.1594/PANGAEA.823274
  3. Karpoff, AM; Peterschmitt, I; Hoffert, M (1980): (Table 5) Ratios between principal elements of the sedimentary deposits at DSDP Leg 55 Holes. https://doi.org/10.1594/PANGAEA.823276
  4. Karpoff, AM; Peterschmitt, I; Hoffert, M (1980): (Table 3) Trace elements at DSDP Leg 55 Holes. https://doi.org/10.1594/PANGAEA.823275