PANGAEA_982945 X-ray Fluorescence (XRF) core scanning 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 X-ray Fluorescence (XRF) core scanning from sediment core of Lake Alchichica in Mexico 2026-01-23 PANGAEA Dataset https://doi.pangaea.de/10.1594/PANGAEA.982945 Investigator Reza Safaierad safaierad.reza@gmail.com Earth Science DEPTH, sediment/rock AGE Chlorine (centered log ratio) Potassium (centered log ratio) Calcium (centered log ratio) Titanium (centered log ratio) Silicon (centered log ratio) Manganese (centered log ratio) Iron (centered log ratio) Nickel (centered log ratio) Copper (centered log ratio) Strontium (centered log ratio) Zirconium (centered log ratio) (Rhodium-Indium)/coherence ratio 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 Powder X-ray diffractometer (XRD), Bruker, D8 ADVANCE ECO Complete 19.5056 19.5056 -97.4389 -97.4389 0.0 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 3431 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 geochemical data were measured from a 57-cm-long sediment core retrieved 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. Geochemical compositions of the sediment core were analyzed using an ITRAX X-ray fluorescence core scanner (CS-XRF) at the INRS Centre Eau Terre Environnement in Canada. The analysis produced the ratio of Compton (incoherent) to Rayleigh (coherent) scattering (Inc/Coh), which can serve as an indicator of sediment organic content. The scans were measured at 2 mm intervals using 20 kV with a current of 10 mA and a dwell time of 20 seconds. To reduce matrix effects and address the closed-sum issue, elemental intensities (measured in counts per second) were transformed using the centered log-ratio (clr) method. For better visualization, all elemental data were subjected to min-max normalization. ** For all details see the full metadata description at "https://doi.pangaea.de/10.1594/PANGAEA.982945"!

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 2026-04-30