Thunell, Robert C; Williams, Douglas F; Belyea, Paul R (1984): (Table 2) Oxygen isotopic of composition of Pliocene to late Pleistocene planktonic foraminifera of the Mediterranean Sea [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.761354, Supplement to: Thunell, RC et al. (1984): Anoxic events in the Mediterranean Sea in relation to the evolution of late Neogene climates. Marine Geology, 59(1-4), 105-134, https://doi.org/10.1016/0025-3227(84)90090-2
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Abstract:
Stable isotopic and micropaleontological studies were made of selected sapropels (organic-rich sediments) deposited in the Mediterranean Sea during the last 5.0 m.y. to determine the processes responsible for their formation. Distinct isotopic and faunal changes occur across sapropels of late Pleistocene, early Pleistocene and latest Pliocene age, while smaller isotopic changes and more stable faunal assemblages are associated with the early and mid-late Pliocene sapropels. The large d18O depletions and euryhaline fauna associated with latest Pliocene-Pleistocene sapropels supports a density stratification model with a low salinity surface layer. In contrast, early Pliocene and mid-late Pliocene sapropels appear to have been formed as the result of sluggish circulation and low oxygen contents in bottom waters of the eastern Mediterranean due to the stable, warm climatic conditions of that time period.
Project(s):
Deep Sea Drilling Project (DSDP)
Coverage:
Median Latitude: 35.287567 * Median Longitude: 25.872700 * South-bound Latitude: 33.830000 * West-bound Longitude: 18.196300 * North-bound Latitude: 35.927800 * East-bound Longitude: 31.807500
Date/Time Start: 1975-05-01T00:00:00 * Date/Time End: 1975-05-17T00:00:00
Minimum DEPTH, sediment/rock: 0.09 m * Maximum DEPTH, sediment/rock: 2.49 m
Event(s):
42-374 * Latitude: 35.847800 * Longitude: 18.196300 * Date/Time: 1975-05-01T00:00:00 * Elevation: -4078.0 m * Penetration: 457 m * Recovery: 76.2 m * Location: Mediterranean Sea/BASIN * Campaign: Leg42 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 22 cores; 141 m cored; 12.5 m drilled; 54 % recovery
42-376 * Latitude: 34.872000 * Longitude: 31.807500 * Date/Time: 1975-05-11T00:00:00 * Elevation: -2101.0 m * Penetration: 216.5 m * Recovery: 75.5 m * Location: Mediterranean Sea/BASIN * Campaign: Leg42 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 22 cores; 193 m cored; 9.5 m drilled; 39.1 % recovery
42-378 * Latitude: 35.927800 * Longitude: 25.116200 * Date/Time: 1975-05-17T00:00:00 * Elevation: -1835.0 m * Penetration: 312 m * Recovery: 34.3 m * Location: Aegean Sea/BASIN * Campaign: Leg42 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 11 cores; 103.5 m cored; 0 m drilled; 33.2 % recovery
Comment:
Sediment depth is given in mbsf. For all of the early Pliocene samples used in this study, isotopic analyses were carried out on Globigerinoides obliquus due to the scarcity of Globigerinoides ruber.
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | ||||
| 2 | Sample code/label | Sample label | Thunell, Robert C | DSDP/ODP/IODP sample designation | ||
| 3 | DEPTH, sediment/rock | Depth sed | m | Geocode | ||
| 4 | Depth, top/min | Depth top | m | Thunell, Robert C | ||
| 5 | Depth, bottom/max | Depth bot | m | Thunell, Robert C | ||
| 6 | Epoch | Epoch | Thunell, Robert C | |||
| 7 | Globigerinoides ruber, δ18O | G. ruber δ18O | ‰ PDB | Thunell, Robert C | Mass spectrometer VG Micromass 602 | |
| 8 | Globigerinoides obliquus, δ18O | G. obliquus δ18O | ‰ PDB | Thunell, Robert C | Mass spectrometer VG Micromass 602 | |
| 9 | Comment | Comment | Thunell, Robert C |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
382 data points