Safaierad, Reza; Israde-Alcántara, Isabel; Rantala, Marttiina V; Domínguez-Vázquez, Gabriela; Schefuß, Enno; Tylmann, Wojciech; Francus, Pierre; Mattielli, Nadine; Metcalfe, Sarah; Fagel, Nathalie (2026): X-ray Fluorescence (XRF) core scanning from sediment core of Lake Alchichica in Mexico [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.982945
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Published: 2026-01-23 • DOI registered: 2026-02-21
Abstract:
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.
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: 0.000 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 | Chlorine (centered log ratio) | Cl (CLR) | Safaierad, Reza | Powder X-ray diffractometer (XRD), Bruker, D8 ADVANCE ECO | ||
| 4 | Potassium (centered log ratio) | K (CLR) | Safaierad, Reza | Powder X-ray diffractometer (XRD), Bruker, D8 ADVANCE ECO | ||
| 5 | Calcium (centered log ratio) | Ca (CLR) | Safaierad, Reza | Powder X-ray diffractometer (XRD), Bruker, D8 ADVANCE ECO | ||
| 6 | Titanium (centered log ratio) | Ti (CLR) | Safaierad, Reza | Powder X-ray diffractometer (XRD), Bruker, D8 ADVANCE ECO | ||
| 7 | Silicon (centered log ratio) | Si (CLR) | Safaierad, Reza | Powder X-ray diffractometer (XRD), Bruker, D8 ADVANCE ECO | ||
| 8 | Manganese (centered log ratio) | Mn (CLR) | Safaierad, Reza | Powder X-ray diffractometer (XRD), Bruker, D8 ADVANCE ECO | ||
| 9 | Iron (centered log ratio) | Fe (CLR) | Safaierad, Reza | Powder X-ray diffractometer (XRD), Bruker, D8 ADVANCE ECO | ||
| 10 | Nickel (centered log ratio) | Ni (CLR) | Safaierad, Reza | Powder X-ray diffractometer (XRD), Bruker, D8 ADVANCE ECO | ||
| 11 | Copper (centered log ratio) | Cu (CLR) | Safaierad, Reza | Powder X-ray diffractometer (XRD), Bruker, D8 ADVANCE ECO | ||
| 12 | Strontium (centered log ratio) | Sr (CLR) | Safaierad, Reza | Powder X-ray diffractometer (XRD), Bruker, D8 ADVANCE ECO | ||
| 13 | Zirconium (centered log ratio) | Zr (CLR) | Safaierad, Reza | Powder X-ray diffractometer (XRD), Bruker, D8 ADVANCE ECO | ||
| 14 | (Rhodium-Indium)/coherence ratio | (Rh-In)/coh | Safaierad, Reza |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
3431 data points
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