Safaierad, Reza; Israde-Alcántara, Isabel; Rantala, Marttiina V; Domínguez-Vázquez, Gabriela; Schefuß, Enno; Tylmann, Wojciech; Francus, Pierre; Mattielli, Nadine; Metcalfe, Sarah; Fagel, Nathalie (2026): δ18O and δ13C from sediment core of Lake Alchichica in Mexico [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.982934
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Published: 2026-01-23 • DOI registered: 2026-02-21
Abstract:
The proxy data are measured from a 57-cm long sediment core collected from Lake Alchichica (19° 24' 38 N, 97° 24' 14 W, 2322 masl) at a water depth of ~ 60 m using a Uwitec® coring device equipped with a 9-cm coring tube. The core was split lengthwise, analyzed using XRF core scanning, and subsampled. A Bayesian chronology was created using 210Pb data and three 14C dates.
For stable isotope geochemistry (δ¹⁸O and δ¹³C) of bulk sediments, samples collected at 1 cm intervals were analyzed at MARUM, University of Bremen, using a Finnigan MAT252 mass spectrometer with a Kiel III carbonate preparation device. Results are reported in delta notation (δ) relative to VPDB. Calibration involved a house standard (Solnhofen limestone) referenced to NBS 19 calcite, with standard deviations of 0.06‰ for both δ¹³C and δ¹⁸O.
Keyword(s):
Supplement to:
Safaierad, Reza; Israde-Alcántara, Isabel; Rantala, Marttiina V; Domínguez-Vázquez, Gabriela; Mohtadi, Mahyar; Schefuß, Enno; Tylmann, Wojciech; Francus, Pierre; Mattielli, Nadine; Metcalfe, Sarah; Fagel, Nathalie (2025): Late Holocene hydroclimate variability and human–environment interactions in the Cuenca Oriental, Mexico: multiproxy evidence from Lake Alchichica. Quaternary Science Reviews, 369, 109618, https://doi.org/10.1016/j.quascirev.2025.109618
Funding:
Fonds de la Recherche Scientifique (FNRS), grant/award no. PDR T.0079.21: Holocene Mexican Crater Lakes and Climate (HolMeCl)
Coverage:
Latitude: 19.505600 * Longitude: -97.438900
Minimum DEPTH, sediment/rock: 0.005 m * Maximum DEPTH, sediment/rock: 0.570 m
Event(s):
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | DEPTH, sediment/rock | Depth sed | m | Safaierad, Reza | Geocode | |
| 2 | AGE | Age | ka BP | Safaierad, Reza | Age, Bayesian based model Plum on Pb-210 and C-14 data | Geocode |
| 3 | δ18O | δ18O | ‰ | Safaierad, Reza | Mass spectrometer, Finnigan, MAT 252 | Relative to VPDB |
| 4 | δ18O, standard deviation | δ18O std dev | ± | Safaierad, Reza | Mass spectrometer, Finnigan, MAT 252 | Relative to VPDB |
| 5 | δ13C | δ13C | ‰ PDB | Safaierad, Reza | Mass spectrometer, Finnigan, MAT 252 | Relative to VPDB |
| 6 | δ13C, standard deviation | δ13C std dev | ± | Safaierad, Reza | Mass spectrometer, Finnigan, MAT 252 | Relative to VPDB |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
228 data points