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): Whole-rock U-Th and Sr-Nd isotope compositions of Ilopango TB suite (Table S9) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.929664, 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-series and Sr-Nd whole-rock isotope compositions of the last four explosive silicic eruptions from Ilopango caldera in El Salvador (TBJ, TB2, TB3, and TB4). Sr and Nd isotope ratios were measured with a Nu Instruments thermal ionization mass spectrometer (Nu-TIMS) at Departamento de Geología, Centro de Investigación Científica y de Educación Superior de Ensenada (CICESE) in the state of Baja California (Mexico), whereas U and Th concentrations and isotopes were measured at University of Wyoming (UWYO) were measured by isotope dilution using a ThermoFisher Neptune ICP-MS multicollector.
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:
Activity ratios calculated using decay constants of 9.1577 x 10-6 a-1 for 230Th (Cheng et al., 2000), 4.9475 x 10-11 a-1 for 232Th (Le Roux & Glendenin, 1963), 2.8263 x 10-6 a-1 for 234U (Cheng et al., 2000), and 1.55125 x 10-10 a-1 for 238U (Jaffey et al., 1971).
BCR-1, TML, AGV-2: relative to reference values from Scott et al. (2019).
Parameter(s):
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Size:
139 data points
Data
| 1 Event | 2 Type | 3 Repl | 4 Sample label | 5 Unit | 6 U [mg/kg] (ppm) | 7 U std e [±] (2σ abs) | 8 Th [mg/kg] (ppm) | 9 Th std e [±] (2σ abs) | 10 U/Th | 11 U/Th std e [±] (2σ abs) | 12 (238U/232Th) | 13 (238U/232Th) std e [±] (2σ abs) | 14 (230Th/232Th) | 15 (230Th/232Th) std e [±] (2σ abs) | 16 (230Th/238U) | 17 (230Th/238U) std e [±] (2σ abs) | 18 (234U/238U) | 19 (234U/238U) std e [±] (2σ abs) | 20 Age dated [ka] (corr. Age; Age used for corre...) | 21 Age dated [ka] ((230Th/238U) Age corr.) | 22 Age dated [ka] ((230Th/232Th) Age corr.) | 23 87Sr/86Sr | 24 87Sr/86Sr std e [±] (2σ abs) | 25 144Nd/143Nd | 26 144Nd/143Nd std e [±] (2σ abs) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| TB_E17-4 | Samples from this study | E17-4 | TB2 | 0.380 | 0.010 | 1.390 | 0.020 | 0.270 | 0.010 | 0.834 | 0.015 | 1.478 | 0.043 | 1.774 | 0.061 | 1.013 | 0.0002 | 8 | 1.835 | 1.529 | 0.703808 | 0.000009 | 0.512975 | 0.000012 | |
| TB_E17-1 | Samples from this study | E17-1 | TB3 | 1.100 | 0.020 | 2.760 | 0.030 | 0.400 | 0.010 | 1.211 | 0.022 | 1.471 | 0.053 | 1.215 | 0.049 | 1.006 | 0.0001 | 16 | 1.249 | 1.512 | 0.703821 | 0.000008 | 0.513000 | 0.000007 | |
| TB_E17-1 | Samples from this study | *Replicate analysis | E17-1* | TB3 | 0.703823 | 0.000007 | 0.512989 | 0.000012 | |||||||||||||||||
| TB_E17-17 | Samples from this study | E17-17 | TB4 | 0.720 | 0.010 | 1.480 | 0.020 | 0.480 | 0.010 | 1.463 | 0.027 | 1.474 | 0.044 | 1.007 | 0.035 | 1.003 | 0.0000 | 45 | 1.011 | 1.479 | 0.703840 | 0.000009 | 0.512985 | 0.000007 | |
| TB_E17-32 | Samples from this study | E17-32 | TBJ | 0.703833 | 0.000008 | 0.512992 | 0.000012 | ||||||||||||||||||
| TB_E17-32 | Samples from this study | *Replicate analysis | E17-32* | TBJ | 0.703832 | 0.000010 | 0.512998 | 0.000007 | |||||||||||||||||
| Reference materials U-Th isotopes | BCR-1 | 1.701 | 0.809 | 5.941 | 0.693 | 0.286 | 0.005 | 0.868 | 0.016 | ||||||||||||||||
| Reference materials U-Th isotopes | TML (Table Mountain Latite rock standard) | 11.110 | 0.811 | 31.501 | 0.709 | 0.353 | 0.007 | 1.070 | 0.020 | 1.077 | 0.003 | 1.007 | |||||||||||||
| Reference materials U-Th isotopes | AGV-2 | 1.876 | 0.808 | 6.069 | 0.693 | 0.309 | 0.006 | 0.938 | 0.017 | 0.949 | 0.003 | 1.012 | |||||||||||||
| Reference materials Sr-Nd isotopes | JNd (n = 6) | 0.512107 | 0.000008 | ||||||||||||||||||||||
| Reference materials Sr-Nd isotopes | NBS 987 (n=2) | 0.710258 | 0.000010 | ||||||||||||||||||||||