Citation:

PANGAEA.982934

Name: δ18O and δ13C from sediment core of Lake Alchichica in Mexico
Published: 2026-01-23
License: https://creativecommons.org/licenses/by/4.0/
Keywords: carbon isotope; Deuterium Isotopes; leaf waxes; Mexico; oxygen isotope; Pollen; Sediment core; XRD; XRF core scanner data

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Published: 2026-01-23 • DOI registered: 2026-02-21

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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):

carbon isotope; Deuterium Isotopes; leaf waxes; Mexico; oxygen isotope; Pollen; Sediment core; XRD; XRF core scanner data

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):

Lake_Alchichica * Latitude: 19.505600 * Longitude: -97.438900 * Elevation: 2322.0 m * Lake water depth: 60 m * Penetration: 0.57 m * Method/Device: Sediment corer, UWITEC * Comment: Uwitec® coring device equipped with a 9-cm coring tube.

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

Data

Download dataset as tab-delimited text — use the following character encoding:

1 Depth sed [m]	2 Age [ka BP]	3 δ18O [‰]	4 δ18O std dev [±]	5 δ13C [‰ PDB]	6 δ13C std dev [±]
0.005	-0.0670	3.190	0.06	4.690	0.06
0.015	-0.0560	2.897	0.06	4.617	0.06
0.025	-0.0450	2.336	0.06	4.507	0.06
0.035	-0.0360	2.357	0.06	4.895	0.06
0.045	-0.0270	2.039	0.06	4.715	0.06
0.055	-0.0180	1.432	0.06	4.497	0.06
0.065	-0.0060	1.687	0.06	4.712	0.06
0.075	0.0050	1.429	0.06	4.627	0.06
0.085	0.0170	1.593	0.06	4.673	0.06
0.095	0.0350	1.445	0.06	4.708	0.06
0.105	0.0600	1.019	0.06	4.449	0.06
0.115	0.0910	1.553	0.06	4.821	0.06
0.125	0.1260	1.268	0.06	4.594	0.06
0.135	0.1640	1.562	0.06	4.636	0.06
0.150	0.2230	1.717	0.06	4.573	0.06
0.155	0.2430	1.992	0.06	4.487	0.06
0.170	0.3007	2.132	0.06	4.565	0.06
0.180	0.3387	2.023	0.06	4.590	0.06
0.190	0.3773	1.482	0.06	4.140	0.06
0.200	0.4165	1.189	0.06	4.113	0.06
0.210	0.4576	1.362	0.06	4.161	0.06
0.220	0.5016	0.820	0.06	3.743	0.06
0.230	0.5510	0.660	0.06	3.724	0.06
0.240	0.6122	1.287	0.06	4.094	0.06
0.250	0.7063	1.703	0.06	4.345	0.06
0.260	0.8288	2.039	0.06	4.349	0.06
0.270	0.9768	2.129	0.06	4.387	0.06
0.280	1.1364	2.214	0.06	4.349	0.06
0.290	1.3018	2.225	0.06	4.503	0.06
0.300	1.4678	2.340	0.06	4.572	0.06
0.310	1.6331	1.532	0.06	4.353	0.06
0.320	1.7919	1.230	0.06	4.328	0.06
0.330	1.9512	1.262	0.06	4.225	0.06
0.340	2.0954	1.472	0.06	4.503	0.06
0.350	2.2365	1.275	0.06	4.207	0.06
0.360	2.3738	1.104	0.06	4.074	0.06
0.370	2.5089	1.403	0.06	4.393	0.06
0.380	2.6415	1.455	0.06	4.430	0.06
0.390	2.7730	1.490	0.06	4.264	0.06
0.400	2.9040	1.685	0.06	4.417	0.06
0.410	3.0403	1.173	0.06	4.361	0.06
0.420	3.1772	1.182	0.06	4.216	0.06
0.430	3.3112	0.954	0.06	3.884	0.06
0.440	3.4451	1.037	0.06	4.115	0.06
0.450	3.5797	1.503	0.06	4.131	0.06
0.460	3.7111	1.320	0.06	4.261	0.06
0.470	3.8415	1.712	0.06	4.282	0.06
0.480	3.9724	1.453	0.06	4.269	0.06
0.490	4.1015	1.071	0.06	4.084	0.06
0.500	4.2287	1.381	0.06	4.263	0.06
0.510	4.3515	0.786	0.06	4.121	0.06
0.520	4.4590	1.232	0.06	4.129	0.06
0.530	4.5626	1.168	0.06	4.164	0.06
0.540	4.6645	1.092	0.06	4.093	0.06
0.550	4.7673	1.207	0.06	4.076	0.06
0.560	4.8680	1.105	0.06	4.104	0.06
0.570	4.9690	1.214	0.06	4.241	0.06