Cisneros de León, Alejandro; Schmitt, Axel K; Kutterolf, Steffen; Schindlbeck-Belo, Julie; Hernández, Walter; Sims, Kenneth W W; Garrison, Jennifer M; Kant, Lisa; Weber, Bodo; Wang, Kuo-Lung; Lee, Hao-Yang; Trumbull, Robert B (2021): 238U-230Th zircon crystallization ages from Ilopango caldera TB eruptions (Table S2) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.929669, In: Cisneros de León, A et al. (2021): Zircon petrochronology and tephra compositions of the last four explosive eruptions from Ilopango caldera (El Salvador) [dataset bundled publication]. PANGAEA, https://doi.org/10.1594/PANGAEA.929673
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Abstract:
This dataset includes results from U-Th disequilibria dating from zircon rims (outermost crystal face) and crystal interiors (polished crystals) of the last four explosive silicic eruptions from Ilopango caldera in El Salvador (TBJ, TB2, TB3, and TB4). Zircon crystals were analyzed employing Secondary Ion Mass Spectrometry at Heidelberg University.
Coverage:
Median Latitude: 13.721855 * Median Longitude: -89.246908 * South-bound Latitude: 13.678660 * West-bound Longitude: -89.436830 * North-bound Latitude: 13.814820 * East-bound Longitude: -89.128260
Event(s):
Comment:
Analytical Uncertainties are 1σ. ∞ = zircon in secular equilibrium (>350 ka)
m = zircon-melt model isochron slope.
Decay constants used: λ232: 4.9475·10−11 a−1; λ230: 9.158·10−6 a−1; λ238: 1.55125·10−10 a−1.
Secular equilibrium zircon reference AS3 (230Th)/(238U)= 1.027 ± 0.005 (MSWD = 0.63; n= 34).
U concentration from measured 238UO+/90Zr2O4+ relative to 91500 zircon with 81.2 ppm U.
Parameter(s):
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Size:
3144 data points
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