PANGAEA_982934 δ18O and δ13C from sediment core of Lake Alchichica in Mexico Safaierad, Reza; Israde-Alcántara, Isabel; Rantala, Marttiina V; Domínguez-Vázquez, Gabriela; Schefuß, Enno; Tylmann, Wojciech; Francus, Pierre; Mattielli, Nadine; Metcalfe, Sarah; Fagel, Nathalie δ18O and δ13C from sediment core of Lake Alchichica in Mexico 2026-01-23 PANGAEA Dataset https://doi.pangaea.de/10.1594/PANGAEA.982934 Investigator Reza Safaierad safaierad.reza@gmail.com Earth Science DEPTH, sediment/rock AGE δ18O δ18O, standard deviation δ13C δ13C, standard deviation geoscientificInformation carbon isotope Deuterium Isotopes Lake_Alchichica leaf waxes Mexico oxygen isotope Pollen Sediment core Sediment corer, UWITEC XRD XRF core scanner data Age, Bayesian based model Plum on Pb-210 and C-14 data Mass spectrometer, Finnigan, MAT 252 Complete 19.5056 19.5056 -97.4389 -97.4389 0.005 m (DEPTH, sediment/rock) 0.57 m (DEPTH, sediment/rock) unrestricted CC-BY-4.0: Creative Commons Attribution 4.0 International English PANGAEA Data Publisher for Earth & Environmental Science https://www.pangaea.de/ Data Center Contact Michael Diepenbroek info@pangaea.de

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Bremen Bremen 28359 Germany online 228 data points text/tab-separated-values 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

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. ** For all details see the full metadata description at "https://doi.pangaea.de/10.1594/PANGAEA.982934"!

http://en.wikipedia.org/wiki/Kyr AGE https://doi.org/10.1007/s13253-018-0328-7 Age, Bayesian based model Plum on Pb-210 and C-14 data https://doi.org/10.1016/j.quascirev.2025.109618 Late Holocene hydroclimate variability and human–environment interactions in the Cuenca Oriental, Mexico: multiproxy evidence from Lake Alchichica DIF 9.4 2026-01-23 2026-09-04