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Murdmaa, Ivar O; Gordeev, Viacheslav V; Kuzmina, Tatyana G; Turanskaya, Natalya V; Avdeiko, G P (1980): Geochemistry at DSDP Leg 55 Holes [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.823271, Supplement to: Murdmaa, IO et al. (1980): Geochemistry of the Leg 55 sediments. In: Jackson, ED; Koisumi, I; et al., (eds.), Initial Reports of the Deep Sea Drilling Project (U.S. Govt. Printing Office), 55, 457-462, https://doi.org/10.2973/dsdp.proc.55.116.1980

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Abstract:
The tops of the Emperor chain guyots, which were drilled during Leg 55, lie above the carbonate compensation depth (CCD), as well as above the foraminiferal dissolution level, i.e., lysocline. They are therefore the sites of accumulation of pelagic foraminiferal nannofossil ooze, such accumulation having taken place here since the moment of the seamounts' subsidence and the termination of shallow-water carbonate accumulation which was formerly developed on their tops. But the existence of strong bottom currents over the tops and slope scarps limits, and at some places reduces to zero, sedimentation of any pelagic particles. At such areas there are formed thick iron-manganese crusts. The seamounts drilled on Leg 55 are within the northern (Boreal) belt of biogenic silica accumulation, which existed in the northern Pacific throughout the Neogene. This circumstance presupposes a possible enrichment of the relatively fine-grained sediments with biogenic silica - diatoms and radiolarians.
Project(s):
Deep Sea Drilling Project (DSDP)
Coverage:
Median Latitude: 41.570783 * Median Longitude: 170.308442 * South-bound Latitude: 37.981300 * West-bound Longitude: 170.020500 * North-bound Latitude: 44.777200 * East-bound Longitude: 170.597700
Date/Time Start: 1977-08-01T00:00:00 * Date/Time End: 1977-08-16T00:00:00
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. Murdmaa, IO; Gordeev, VV; Kuzmina, TG et al. (1980): (Table 1) Bulk composition of DSDP Leg 55 Holes. https://doi.org/10.1594/PANGAEA.823266
  2. Murdmaa, IO; Gordeev, VV; Kuzmina, TG et al. (1980): (Table 4) Interrelations among major elements at DSPD Leg 55 Holes. https://doi.org/10.1594/PANGAEA.823270
  3. Murdmaa, IO; Gordeev, VV; Kuzmina, TG et al. (1980): (Table 2) Phosphorus and sulphur contents in DSDP Leg 55 Holes. https://doi.org/10.1594/PANGAEA.823267
  4. Murdmaa, IO; Gordeev, VV; Kuzmina, TG et al. (1980): (Table 3) Trace elements at DSDP Leg 55 Holes. https://doi.org/10.1594/PANGAEA.823268