Lange, Carina Beatriz; Berger, Wolfgang H (1993): (Table 1) Diatom abundance and preservation in ODP Hole 130-806B samples [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.780453, Supplement to: Lange, CB; Berger, WH (1993): Diatom productivity and preservation in the western equatorial Pacific: the quaternary record. In: Berger, WH; Kroenke, LW; Mayer, LA; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 130, 509-523, https://doi.org/10.2973/odp.proc.sr.130.011.1993
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Abstract:
We report on diatom abundance and preservation stratigraphy in the uppermost four cores of Ocean Drilling Program Hole 806B, which span the Quaternary period. Changes in diatom abundance and preservation show a rather complicated pattern, with much noise at high frequencies. However, in the cycles corresponding to eccentricity and obliquity variations, the picture is quite clear. Abundance and preservation follow glacial-interglacial cycles, with lowest abundances and poorest preservation observed in sediments that correspond to glacial stages.
Seventy taxa compose the diatom assemblage of Hole 806B (from Samples 130-806B-1H-1, 8-9 cm, to -4H-7, 73-74 cm) with Azpeitia nodulifera as the dominant member. This species exhibits significant size variations related to glacial and interglacial stages during the Pleistocene.
The distribution of power in the Fourier spectrum of the diatom signal (in the time domain) displays the expected Milankovitch frequencies (at 100,41, and 24-18 k.y.). It also shows concentration at various "odd" frequencies, especially at 62 k.y., suggesting a complicated response of productivity (and silicate chemistry) to climatic forcing.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Latitude: 0.318500 * Longitude: 159.361000
Date/Time Start: 1990-02-18T21:00:00 * Date/Time End: 1990-02-23T01:30:00
Minimum DEPTH, sediment/rock: 0.08 m * Maximum DEPTH, sediment/rock: 7.08 m
Event(s):
130-806B * Latitude: 0.318500 * Longitude: 159.361000 * Date/Time Start: 1990-02-18T21:00:00 * Date/Time End: 1990-02-23T01:30:00 * Elevation: -2519.9 m * Penetration: 743.1 m * Recovery: 666.36 m * Location: North Pacific Ocean * Campaign: Leg130 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 78 cores; 743.1 m cored; 0 m drilled; 89.7 % recovery
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Sample code/label | Sample label | Lange, Carina Beatriz | DSDP/ODP/IODP sample designation | ||
| 2 | DEPTH, sediment/rock | Depth sed | m | Geocode – mbsf | ||
| 3 | Diatom preservation index | K/K+L | Lange, Carina Beatriz | 1 = poor, 2 = moderate, 3 = good | ||
| 4 | Diatoms | Diatoms | #/g | Lange, Carina Beatriz | estimated | |
| 5 | Diatom abundance index | DAI | Lange, Carina Beatriz | = log(x/1000 + 1) |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
260 data points