Hönisch, Bärbel; Bickert, Torsten; Hemming, N Gary (2008): Stable carbon and oxygen isotope ratios of Cibicidoides wuellerstorfi (Table 1) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.725482, Supplement to: Hönisch, B et al. (2008): Modern and Pleistocene boron isotope composition of the benthic foraminifer Cibicidoides wuellerstorfi. Earth and Planetary Science Letters, 272(1-2), 309-318, https://doi.org/10.1016/j.epsl.2008.04.047
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Abstract:
Here we present the first species-specific study of boron isotopes in the epibenthic foraminifer species Cibicidoides wuellerstorfi. Coretop samples from a water depth profile from 1000 to 4500 m on the northern flank of the Walvis Ridge are 4.4 per mil lower than the values expected, based on calculations of the delta 11B(borate) of ambient seawater. Similar values for this foraminifer species are presented from ODP site 668B at the Sierra Leone Rise, in the equatorial Atlantic. The consistency between data of the same species suggests the offsets are primary, rather than diagenetic. Glacial C. wuellerstorfi from ODP 668B and Walvis Ridge have boron isotope compositions only slightly different to interglacial samples, that is no larger than +0.10 pH units, or +23 µmol/kg in [CO3[2-]] above the reconstructed glacial lysocline, and -0.07 pH units, or -14 µmol/kg in [CO3[2-]] below. We use these results to suggest that glacial deep water pH in the Atlantic was similar to interglacial pH. The new data resolve the inconsistency between the previously reported high bottom water pH and the lack of significant carbonate preservation of the glacial deep ocean.
Coverage:
Median Latitude: -23.254487 * Median Longitude: 6.527307 * South-bound Latitude: -24.690000 * West-bound Longitude: 5.028333 * North-bound Latitude: -21.586667 * East-bound Longitude: 11.703333
Date/Time Start: 1988-03-04T00:00:00 * Date/Time End: 1992-01-11T00:00:00
Minimum DEPTH, sediment/rock: 0.005 m * Maximum DEPTH, sediment/rock: 0.380 m
Event(s):
GeoB1032-2 * Latitude: -22.913333 * Longitude: 6.026667 * Date/Time: 1988-03-04T00:00:00 * Elevation: -2490.0 m * Penetration: 0.32 m * Location: Walvis Ridge * Campaign: M6/6 * Basis: Meteor (1986) * Method/Device: Giant box corer (GKG) * Comment: Foram.-schl., weiß, Pterop.
GeoB1032-3 * Latitude: -22.915000 * Longitude: 6.036667 * Date/Time: 1988-03-04T00:00:00 * Elevation: -2505.0 m * Penetration: 12 m * Location: Angola Basin * Campaign: M6/6 * Basis: Meteor (1986) * Method/Device: Gravity corer (Kiel type) (SL) * Comment: Foram.-schlamm, sandig
GeoB1034-1 * Latitude: -21.721667 * Longitude: 5.430000 * Date/Time: 1988-03-04T00:00:00 * Elevation: -3731.0 m * Penetration: 0.25 m * Location: Walvis Ridge * Campaign: M6/6 * Basis: Meteor (1986) * Method/Device: Giant box corer (GKG) * Comment: Foram.-schlamm, weiß
Comment:
Age assignments according to benthic oxygen isotope stratigraphy of GeoB cores (Bickert and Mackensen, 2003)
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | ||||
| 2 | Latitude of event | Latitude | ||||
| 3 | Longitude of event | Longitude | ||||
| 4 | Elevation of event | Elevation | m | |||
| 5 | DEPTH, sediment/rock | Depth sed | m | Geocode | ||
| 6 | AGE | Age | ka BP | Geocode | ||
| 7 | Cibicidoides wuellerstorfi, δ13C | C. wuellerstorfi δ13C | ‰ PDB | Hönisch, Bärbel | Isotope ratio mass spectrometry | |
| 8 | Cibicidoides wuellerstorfi, δ18O | C. wuellerstorfi δ18O | ‰ PDB | Hönisch, Bärbel | Isotope ratio mass spectrometry |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
26 data points