Massari, Francesco; Fellin, Maria Giuditta; Stefani, Cristina; Enkelmann, Eva; Dieni, Iginio; Sanchetti, Stefano (2026): Detrital zircon thermochronologic analysis of the Lanaittu Sandstone in Eastern Sardinia, Italy [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.995334
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Published: 2026-06-23 • DOI registered: 2026-06-23
Abstract:
The data set comprises the results of the (U-Th)/He analysis of detrital zircons from two samples (177-1 and 177-2) of the Lanaittu Sandstone. The analysis was performed following the procedure as in Pickering et al. (2020) and Härtel et al. (2026) using a Resonetics Resolution LR 193 nm excimer laser attached to an Alphachron system for the He measurement. The Alphachron He extraction system was equipped with an ultra-high vacuum chamber. The laser ablation system was set up with a spot size of 15 µm, an ablation time of 6 s and a repetition rate of 10 Hz. The same system setting was used to measure both the validation references and the samples.
Supplement to:
Massari, Francesco; Fellin, Maria Giuditta; Stefani, Cristina; Enkelmann, Eva; Dieni, Iginio; Sanchetti, Stefano (accepted): Exhumed eo-Alpine high-pressure rocks fed Campanian turbidites in eastern Sardinia. Geochemistry, Geophysics, Geosystems
Related to:
Härtel, Birk; Enkelmann, Eva; Whelan, Elisha (2026): Combined zircon U/Pb-(U-Th)/He-Raman dating. Chemical Geology, 713, 123435, https://doi.org/10.1016/j.chemgeo.2026.123435
References:
Härtel, Birk; Enkelmann, Eva (2024): The daughter–parent plot: a tool for analyzing thermochronological data. Geochronology (GChron), 6(3), 429-448, https://doi.org/10.5194/gchron-6-429-2024
Pickering, Julia; Matthews, William A; Enkelmann, Eva; Guest, Bernard; Sykes, Chris; Koblinger, Brett M (2020): Laser ablation (U-Th-Sm)/He dating of detrital apatite. Chemical Geology, 548, 119683, https://doi.org/10.1016/j.chemgeo.2020.119683
Funding:
Coverage:
Latitude: 40.259200 * Longitude: 9.501400
Date/Time Start: 1994-01-01T00:00:00 * Date/Time End: 1994-01-01T00:00:00
Event(s):
Comment:
The effective uranium concentration (eU) was derived from the actinide concentrations recalculated iteratively to a common mass and disintegration rate of 238U (Härtel & Enkelmann, 2024).
The laser abaltion pit volume was determined by optical interferometry as described in Pickering et al. (2020).
The He concentration was calculated from the measured (blank-corrected) volume of He, the pit volume, and an assumed zircon density of 4.6 ± 0.1 g/cm³
The He uncertainty was calculated by uncertainty propagation from analytical uncertainties on the He volume, blank uncertainties, uncertainties in pit volume, zircon density, and the calibration curve.
The He concentration was calibrated against a linear function of bracketing reference materials (FC-1, Fish Canyon Tuff).
The uncertainty of the He concentration was calculated from the raw He uncertainty and the calibration line uncertainty.
Zircon (U-Th)/He date were calculated from the calibrated He concentration and the eU using the iterative approach of Härtel & Enkelmann (2024).
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Enkelmann, Eva | |||
| 2 | Spot identification | Spot ID | Enkelmann, Eva | Helium laser ablation | ||
| 3 | Uranium | U | µg/g | Enkelmann, Eva | Laser Ablation System, Resonetics Resolution, LR 193 nm; coupled with a automated helium microanalyzer, Alphachron | |
| 4 | Uranium, uncertainty | U unc | ± | Enkelmann, Eva | Laser Ablation System, Resonetics Resolution, LR 193 nm; coupled with a automated helium microanalyzer, Alphachron | Represents two standard deviation |
| 5 | Thorium | Th | µg/g | Enkelmann, Eva | Laser Ablation System, Resonetics Resolution, LR 193 nm; coupled with a automated helium microanalyzer, Alphachron | |
| 6 | Thorium, uncertainty | Th unc | ± | Enkelmann, Eva | Laser Ablation System, Resonetics Resolution, LR 193 nm; coupled with a automated helium microanalyzer, Alphachron | Represents two standard deviation |
| 7 | Uranium, effective | e U | µg/g | Enkelmann, Eva | Laser Ablation System, Resonetics Resolution, LR 193 nm; coupled with a automated helium microanalyzer, Alphachron | |
| 8 | Uranium, effective, uncertainty | e U unc | ± | Enkelmann, Eva | Laser Ablation System, Resonetics Resolution, LR 193 nm; coupled with a automated helium microanalyzer, Alphachron | Represents two standard deviation |
| 9 | Ablation pit | Ablation pit | µm3 | Enkelmann, Eva | Laser Ablation System, Resonetics Resolution, LR 193 nm; coupled with a automated helium microanalyzer, Alphachron | |
| 10 | Ablation pit, uncertainty | Ablation pit unc | ± | Enkelmann, Eva | Laser Ablation System, Resonetics Resolution, LR 193 nm; coupled with a automated helium microanalyzer, Alphachron | Represents two standard deviation |
| 11 | Helium | He | nmol/g | Enkelmann, Eva | Laser Ablation System, Resonetics Resolution, LR 193 nm; coupled with a automated helium microanalyzer, Alphachron | |
| 12 | Helium, uncertainty | He unc | ± | Enkelmann, Eva | Laser Ablation System, Resonetics Resolution, LR 193 nm; coupled with a automated helium microanalyzer, Alphachron | Represents two standard deviation |
| 13 | Helium | He | nmol/g | Enkelmann, Eva | Laser Ablation System, Resonetics Resolution, LR 193 nm; coupled with a automated helium microanalyzer, Alphachron | Corrected for ablation pit volume |
| 14 | Helium, uncertainty | He unc | ± | Enkelmann, Eva | Laser Ablation System, Resonetics Resolution, LR 193 nm; coupled with a automated helium microanalyzer, Alphachron | Corrected for ablation pit volume. Represents two standard deviation |
| 15 | Age, mineral | Age mineral | Ma | Enkelmann, Eva | Laser Ablation System, Resonetics Resolution, LR 193 nm; coupled with a automated helium microanalyzer, Alphachron | |
| 16 | Age, mineral, uncertainty | Age mineral unc | ± | Enkelmann, Eva | Laser Ablation System, Resonetics Resolution, LR 193 nm; coupled with a automated helium microanalyzer, Alphachron | Represents two standard deviation |
| 17 | Comment | Comment | Enkelmann, Eva | Laser Ablation System, Resonetics Resolution, LR 193 nm; coupled with a automated helium microanalyzer, Alphachron | UNC: high helium uncertainty (>30%, 2s) |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
3562 data points
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