Kuroda, Tomoko; Sakamoto, Tatsuhiko; Koizumi, Itaru (2000): (Table 1) Biogenic and terrigenous components and ages of ODP Hole 167-1020B sediments [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.794530, Supplement to: Kuroda, T et al. (2000): Data Report: Temporal variations of biogenic components on the northern California margin since the late Pleistocene, Site 1020. In: Lyle, M; Koizumi, I; Richter, C; Moore, TC Jr (eds.) Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 167, 1-4, https://doi.org/10.2973/odp.proc.sr.167.232.2000
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Abstract:
The California Current and associated coastal upwelling have changed with the growth and decay of the North American ice sheets since 2.5 Ma. Because the coastal upwelling has a close relationship with biogenic productivity in surface water, analyses of biogenic components in sediments of the upwelling region enable us to reconstruct the past changes of the productivity and/or the current systems.
In this study, we analyzed biogenic silica and carbonate as well as organic carbon in sediments from the northern California margin, Hole 1020B. The results show that terrigenous-free content of biogenic silica is high during interglacial periods since 800 ka and varies in correspondence with 100-k.y. glacial-interglacial cycles. On the other hand, terrigenous-free content of biogenic carbonate is high during glacial periods. These temporal variations may have been caused by changes in the origin of deep water.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Latitude: 41.009000 * Longitude: -126.434000
Date/Time Start: 1996-06-08T13:50:00 * Date/Time End: 1996-06-10T20:15:00
Minimum DEPTH, sediment/rock: 0.7 m * Maximum DEPTH, sediment/rock: 74.5 m
Event(s):
167-1020B * Latitude: 41.009000 * Longitude: -126.434000 * Date/Time Start: 1996-06-08T13:50:00 * Date/Time End: 1996-06-10T20:15:00 * Elevation: -3038.0 m * Penetration: 278.8 m * Recovery: 265 m * Location: North Pacific Ocean * Campaign: Leg167 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 30 cores; 278.8 m cored; 0 m drilled; 95.1 % recovery
Comment:
DEPTH, sediment is given in mbsf.
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Sample code/label | Sample label | Kuroda, Tomoko | DSDP/ODP/IODP sample designation | ||
| 2 | DEPTH, sediment/rock | Depth sed | m | Geocode | ||
| 3 | Depth, composite | Depth comp | mcd | Kuroda, Tomoko | ||
| 4 | Age model | Age model | ka | Kuroda, Tomoko | using data from Mix et al. (1995, doi:10.2973/odp.proc.sr.138.120.1995) | |
| 5 | Opal, biogenic silica | bSiO2 | % | Kuroda, Tomoko | Opal, extraction; Mortlock & Froelich, 1989 | method modified |
| 6 | Carbonate, biogenic | Carb biog | % | Kuroda, Tomoko | Calculated | = TIC (wt%) x 8.34 |
| 7 | Carbon, organic, total | TOC | % | Kuroda, Tomoko | Carbon analyser, LECO | |
| 8 | Terrigenous | Terr | % | Kuroda, Tomoko | Calculated | total; = 100 - [biogenic silica (wt%) + biogenic carbonate (wt%) + TOC (wt%)] |
| 9 | Quartz, intensity | Qz | cps | Kuroda, Tomoko | X-ray diffraction (XRD) | Qz(101) |
| 10 | Opal, biogenic silica | bSiO2 | % | Kuroda, Tomoko | Opal, extraction; Mortlock & Froelich, 1989 | of total bSiO2, Carb biog and TOC |
| 11 | Carbonate, biogenic | Carb biog | % | Kuroda, Tomoko | of total bSiO2, Carb biog and TOC | |
| 12 | Carbon, organic, total | TOC | % | Kuroda, Tomoko | of total bSiO2, Carb biog and TOC |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
1056 data points