Safaierad, Reza; Israde-Alcántara, Isabel; Rantala, Marttiina V; Domínguez-Vázquez, Gabriela; Schefuß, Enno; Tylmann, Wojciech; Francus, Pierre; Mattielli, Nadine; Metcalfe, Sarah; Fagel, Nathalie: δ Deuterium leaf wax isotopes from sediment core of Lake Alchichica in Mexico [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.982935 (dataset in review)
Abstract:
The isotope analyses were performed on subsamples 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. n-alkanes were extracted from 20 dried samples (1.3–2.8 g) using DCM:MeOH (9:1) in a DIONEX ASE-200 at 100°C and 1000 psi for 5 minutes, repeated thrice, with squalane as an internal standard. Lipid extracts were concentrated under N₂, treated with activated copper to remove sulfur, and saponified with 6% KOH in MeOH at 80°C for 2 hours. Hydrocarbons, ketones, and alcohols were extracted with hexane, and non-polar hydrocarbons were isolated using silica gel and silver nitrate-silica columns. Saturated fractions were analyzed by GC/FID at MARUM, University of Bremen, with retention time comparison for compound identification and <5% quantification precision.
Keyword(s):
Supplement to:
Safaierad, Reza (accepted): Late Holocene hydroclimate variability and human-environment interactions in the Cuenca Oriental, Mexico: multiproxy evidence from Lake Alchichica. Quaternary Science Reviews
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: 0.560 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 | δ Deuterium, wax | δD wax | ‰ SMOW | Safaierad, Reza | Gas chromatography - Flame Ionization Detection (GC-FID) | [VSMOW] |
| 4 | δ Deuterium, wax, standard deviation | δD wax std dev | ± | Safaierad, Reza | Gas chromatography - Flame Ionization Detection (GC-FID) | [VSMOW] |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
40 data points