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Leinen, Margaret W; Graybeal, A (1986): Sedimentation in the vicinity of Leg 92 Drill Sites: Studies of site survey cores [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.789427, Supplement to: Leinen, MW; Graybeal, A (1986): Sedimentation in the vicinity of Leg 92 drill sites: Studies of site survey cores. In: Leinen, M; Rea DK; et al. (eds.), Initial Reports of the Deep Sea Drilling Project, Washington (U.S. Govt. Printing Office), 92, 239-251, https://doi.org/10.2973/dsdp.proc.92.109.1986

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Abstract:
Surveys of the areas surrounding the sites drilled on the Leg 92 19°S transect showed that sedimentation at all except the oldest site is dominated by calcium carbonate deposition. The sediments in the area of the oldest site, west of the Austral Fracture Zone, are being deposited beneath the calcium carbonate compensation depth and are dominated by terrigenous and metal-rich hydrogenous and hydrothermal sediments. The noncarbonate sediments in all of the areas east of the Austral Fracture Zone are dominated by hydrothermal sediment similar in composition to that presently being deposited at the East Pacific Rise. Although no biogenic microfossils were present in smear slides of the sediment, geochemical partitioning suggests that a remnant signal of siliceous biogenic deposition may be preserved, especially in gravity core (GC) 8, which was collected from a high heat flow zone near Site 600. The siliceous sediment may also result from the deposition of amorphous hydrothermal silica from the higher concentrations of pore water SiO2 characteristic of the upwelling waters. Sedimentation on the broad plateaus that characterize each area is quite uniform and suggests that sites on these plateaus will be broadly representative of pelagic sedimentation in the area.
Project(s):
Deep Sea Drilling Project (DSDP)
Coverage:
Median Latitude: -19.221996 * Median Longitude: -120.360846 * South-bound Latitude: -19.496200 * West-bound Longitude: -129.747700 * North-bound Latitude: -18.810000 * East-bound Longitude: -114.960700
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
7 datasets

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Datasets listed in this publication series

  1. Leinen, MW; Graybeal, A (1986): (Table 4) Biostratigraphy of selected site survey cores of Ariadne II sediments in the eastern South Pacific. https://doi.org/10.1594/PANGAEA.789543
  2. Leinen, MW; Graybeal, A (1986): (Table 6) Concentration of factor for selected site survey cores of Ariadne II sediments in the eastern South Pacific. https://doi.org/10.1594/PANGAEA.789563
  3. Leinen, MW; Graybeal, A (1986): (Table 8) Concentration of linear programming end members for selected site survey cores of Ariadne II sediments in the eastern South Pacific. https://doi.org/10.1594/PANGAEA.789566
  4. Leinen, MW; Graybeal, A (1986): (Table 9) Element accumulation rates for selected site survey cores of Ariadne II sediments in the eastern South Pacific. https://doi.org/10.1594/PANGAEA.789425
  5. Leinen, MW; Graybeal, A (1986): (Table 2A) Geochemistry of Ariadne II sediments corrected for dilution by salt from pore waters in the eastern South Pacific. https://doi.org/10.1594/PANGAEA.789557
  6. Leinen, MW; Graybeal, A (1986): (Table 2B) Geochemistry of Ariadne II sediments corrected for dilution by salt from pore waters and are carbonate free in the eastern South Pacific. https://doi.org/10.1594/PANGAEA.789571
  7. Leinen, MW; Graybeal, A (1986): (Table 3) Salt and water contents of Ariadne II sediments in the eastern South Pacific. https://doi.org/10.1594/PANGAEA.789570