Isaza-Londoño, Carolina; MacLeod, Kenneth G; Huber, Brian T (2006): Isotopic measurements of 3 foraminifer species from ODP Hole 171-1050C [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.742669, Supplement to: Isaza-Londoño, C et al. (2006): Maastrichtian North Atlantic warming, increasing stratification, and foraminiferal paleobiology at three timescales. Paleoceanography, 21(1), PA1012, https://doi.org/10.1029/2004PA001130
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Abstract:
Analysis of 944 single specimens of three species of late Maastrichtian planktonic foraminifera (Racemiguembelina fructicosa, Contusotruncana contusa, and Rugoglobigerina rugosa) from 38 samples spanning the last 3 Myr of the Cretaceous shows consistent isotopic trends through time, consistent isotopic differences among taxa, and high within-sample isotopic variability throughout. Within-sample variability does not change systematically through time for any taxon, but average d18O values decrease by approx. 1.5 per mill, and average d13C values diverge up section. Comparing taxa, average d18O values are similar within most samples, but average d13C values generally decrease from R. fructicosa to R. rugosa to C. contusa. In addition, the within-sample variability of individual d13C measurements is larger for R. fructicosa than for either C. contusa or R. rugosa, an observation which is consistent with a photosymbiotic habitat for R. fructicosa. In terms of Maastrichtian paleoceanography the negative d18O trend of approx. 1.5 per mill corresponds to a temperature increase of approx. 6°C, and the divergence of d13C values up section suggests an increasingly stratified water column in the western Atlantic through the late Maastrichtian. We suggest that these trends are best explained by increasing import of South Atlantic waters into the North Atlantic and an intensification of the Northern Hemisphere polar front.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Latitude: 30.099910 * Longitude: -76.234970
Date/Time Start: 1997-02-08T19:30:00 * Date/Time End: 1997-02-08T19:30:00
Minimum DEPTH, sediment/rock: 408.75 m * Maximum DEPTH, sediment/rock: 455.35 m
Event(s):
171-1050C * Latitude: 30.099910 * Longitude: -76.234970 * Date/Time: 1997-02-08T19:30:00 * Elevation: -2296.5 m * Penetration: 606 m * Recovery: 200.19 m * Location: Blake Nose, North Atlantic Ocean * Campaign: Leg171B * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 31 core; 288.5 m cored; 317.5 m drilled; 69.4 % recovery
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Sample code/label | Sample label | Isaza-Londoño, Carolina | DSDP/ODP/IODP sample designation | ||
| 2 | DEPTH, sediment/rock | Depth sed | m | Geocode | ||
| 3 | Racemiguembelina fructicosa, δ13C | R. fructicosa δ13C | ‰ PDB | Isaza-Londoño, Carolina | Isotope ratio mass spectrometry | |
| 4 | Racemiguembelina fructicosa, δ18O | R. fructicosa δ18O | ‰ PDB | Isaza-Londoño, Carolina | Isotope ratio mass spectrometry | |
| 5 | Contusotruncana contusa, δ13C | C. contusa δ13C | ‰ PDB | Isaza-Londoño, Carolina | Isotope ratio mass spectrometry | |
| 6 | Contusotruncana contusa, δ18O | C. contusa δ18O | ‰ PDB | Isaza-Londoño, Carolina | Isotope ratio mass spectrometry | |
| 7 | Rugoglobigerina rugosa, δ13C | R. rugosa δ13C | ‰ PDB | Isaza-Londoño, Carolina | Isotope ratio mass spectrometry | |
| 8 | Rugoglobigerina rugosa, δ18O | R. rugosa δ18O | ‰ PDB | Isaza-Londoño, Carolina | Isotope ratio mass spectrometry | |
| 9 | Sea surface temperature | SST | °C | Isaza-Londoño, Carolina |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
3776 data points
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