Czwakiel, Nicole; Gallagher, Timothy M; Serach, Lily; Ludvigson, Greg; Gao, Peng; Nie, Junsheng; Suc, Jean-Pierre; Da, Jiawei; Breecker, Daniel O: Pedogenic carbonate nodule δ18O and δ13C record from the Pliocene-Pleistocene Villalba-Alta section, Teruel [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.979978 (dataset in review)
Abstract:
Two sampling campaigns to the Teruel Basin, Spain were carried out in 2016 and in 2019. During the 2016 pilot expedition, 52 nodules (2-6 nodules per stratigraphic level) were collected and the section was measured as depth below the prominent cliff-forming conglomerate at the top of the section. During the 2019 expedition the section was measured as height above the lowest outcrop. 3-14 nodules were collected from each stratigraphic level at which nodules were observed resulting in 1,257 discrete soil carbonate nodules from 148 different heights. 312 nodules from 43 different heights were selected for stable isotope analyses. In the laboratory, nodules were split in half using a mallet and then the micrite was sampled with a Dremel drill avoiding spar. The resulting powders were then reacted with H3PO4 under 70°C to liberate CO2 before being analyzed on a Thermo 253 isotope ratio mass spectrometer operating in continuous flow mode and interfaced with a Thermo Gasbench II at the University of Texas at Austin. Drift corrections were applied to the soil carbonate δ values using an internal Carrara marble (UTM) standard while laboratory standards NBS-18, NBS-19 were used to calibrate delta values to the PDB scale. The standards across all runs had an average reproducibility of 0.16‰. Additionally, spar and coexisting micrite from eight nodules were sampled separately, and analyzed using the same procedure to determine if they had δ18O values distinct from each other.
Keyword(s):
Related to:
Czwakiel, Nicole; Gallagher, Timothy M; Serach, Lily; Ludvigson, Greg; Gao, Peng; Nie, Junsheng; Suc, Jean-Pierre; Da, Jiawei; Breecker, Daniel O (submitted): The Onset of Summer Drying on the Iberian Peninsula During Pliocene Global Cooling. Paleoceanography and Paleoclimatology
Funding:
National Science Foundation (NSF), grant/award no. 1545859: PIRE: DUST stimulated drawn-down of atmospheric CO2 as a trigger for Northern Hemisphere Glaciation
Coverage:
Median Latitude: 40.617500 * Median Longitude: -0.978000 * South-bound Latitude: 40.615000 * West-bound Longitude: -0.979000 * North-bound Latitude: 40.620000 * East-bound Longitude: -0.977000
Date/Time Start: 2016-06-15T08:00:00 * Date/Time End: 2016-06-15T08:00:00
Minimum SECTION, height: -66.10 m * Maximum SECTION, height: 89.50 m
Event(s):
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Breecker, Daniel O | |||
| 2 | SECTION, height | Section | m | Breecker, Daniel O | Geocode – negative values = Section, depth | |
| 3 | Number | No | Breecker, Daniel O | Nodule Number | ||
| 4 | Sample code/label | Sample label | Breecker, Daniel O | |||
| 5 | AGE | Age | ka BP | Breecker, Daniel O | Geocode | |
| 6 | Age | Age | Ma | Breecker, Daniel O | ||
| 7 | δ18O, carbonate nodules | δ18O nodules | ‰ SMOW | Breecker, Daniel O | Mass spectrometer, Thermo, 253; coupled with Thermo, Gasbench II | |
| 8 | δ13C, carbonate nodules | δ13C nodules | ‰ PDB | Breecker, Daniel O | Mass spectrometer, Thermo, 253; coupled with Thermo, Gasbench II |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
1774 data points