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Cisneros de León, Alejandro; Danišík, Martin; Schmitt, Axel K; Schindlbeck-Belo, Julie; Kutterolf, Steffen; Sims, Kenneth W W; Garrison, Jennifer M; Mittal, Tushar: New and recalculated U-Th zircon ages from large-silicic eruptions of Atitlán caldera based on new bulk-rock U-series data (Table S3) [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.973418 (dataset in review), In: Cisneros de León, A et al.: Zircon geochronology and tephra glass compositions from Atitlán caldera (Guatemala) [dataset bundled publication]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.973416 (dataset in review)

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Abstract:
This dataset presents zircon 238U-230Th disequilibrium dates from multiple tephra samples from the Atitlán caldera in Guatemala, Central America. Zircon 238U-230Th isotope compositions were obtained using secondary ion mass spectrometry (SIMS) at Heidelberg University, Germany. Dates were calculated using the isochron method and new bulk-rock U-series data presented in Table S2.
Keyword(s):
Central America; GLASS; SIMS; Supereruption; Tephra
Coverage:
Median Latitude: 14.863438 * Median Longitude: -91.294350 * South-bound Latitude: 12.251000 * West-bound Longitude: -92.118898 * North-bound Latitude: 16.998602 * East-bound Longitude: -89.806190
Date/Time Start: 2005-11-17T08:45:00 * Date/Time End: 2005-11-17T08:45:00
Event(s):
G13-87 * Latitude: 14.840100 * Longitude: -91.470000 * Location: Atitlán caldera, Guatemala * Method/Device: Rock sample (ROCK)
G17-4 * Latitude: 14.490950 * Longitude: -90.596420 * Location: Atitlán caldera, Guatemala * Method/Device: Rock sample (ROCK)
G17-23 * Latitude: 14.748970 * Longitude: -90.976380 * Location: Atitlán caldera, Guatemala * Method/Device: Rock sample (ROCK)
Comment:
Analytical Uncertainties are 1σ. ∞ = zircon in secular equilibrium (˃350 ka)
m = zircon-melt model isochron slope; (238U)/(232Th) = 0.983 ± 0.009 and (230Th)/(232Th) = 1.072 ± 0.026 from this study.
Decay constants used: λ232: 4.9475·10−11 a−1; λ230: 9.1705·10−6 a−1; λ238: 1.55125·10−10 a−1.
Secular equilibrium zircon reference AS3 (230Th)/(238U)= 1.001 ± 0.006 (MSWD = 0.56; n= 19) for session where new samples were analyzed (G13-87, PET-06, M6613-229, M18-1).
U concentration from measured 238UO+/90Zr2O4+ relative to 91500 zircon with 81.2 ppm U.
Rows with different gray color represent multi-dated grain interiors.
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1Event labelEventCisneros de León, Alejandro
2Sample typeSamp typeCisneros de León, Alejandro
3Sample code/labelSample labelCisneros de León, Alejandro
4Domain, mineralogyDomain mineralCisneros de León, Alejandro
5Uranium-238/Thorium-232 activity ratio(238U/232Th)Cisneros de León, Alejandro
6Uranium-238/Thorium-232 activity ratio, standard deviation(238U/232Th) std dev±Cisneros de León, Alejandro1s
7Thorium-230/Thorium-232 activity ratio(230Th/232Th)Cisneros de León, Alejandro
8Thorium-230/Thorium-232 activity ratio, standard deviation(230Th/232Th) std dev±Cisneros de León, Alejandro1s
9Zircon-melt model isochron slopeZr model isochron slopeCisneros de León, Alejandrom
10Zircon-melt model isochron slope, standard errorZr model isochron slope std e±Cisneros de León, Alejandro1s
11Age, datedAge datedkaCisneros de León, Alejandro
12Age, dated, error to olderAge e +ka +Cisneros de León, Alejandro
13Age, dated, error to youngerAge e -ka -Cisneros de León, Alejandro
14UraniumUmg/kgCisneros de León, Alejandroppm
15CommentCommentCisneros de León, Alejandro
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:
4754 data points

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