Fretzdorff, Susanne; Haase, Karsten M; Leat, Philip; Livermore, Roy A; Garbe-Schönberg, Dieter; Fietzke, Jan; Stoffers, Peter (2003): (Table 1) Composition of volcanic glasses from the East Scotia Ridge [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.847689, Supplement to: Fretzdorff, S et al. (2003): 230Th-238U disequilibrium in East Scotia backarc basalts: Implications for slab contributions. Geology, 31(8), 693, https://doi.org/10.1130/G19469.1
Always quote citation above when using data! You can download the citation in several formats below.
Abstract:
New U-series isotope data for lavas from the East Scotia backarc spreading center span a large range in (230Th/232Th) and (238U/232Th). Most of the backarc lavas have (238U/230Th) < 1, similar to the composition of mid-oceanic-ridge basalts (MORB). Lavas from two segments have (238U/230Th) > 1 and are enriched in fluid-mobile elements, implying a recent addition of a U-rich slab-derived component. The data from one segment suggest an influence from an aqueous fluid from altered MORB, whereas samples from the other slab-influenced segment show addition of a sediment melt. The slab-influenced samples form a distinct trend in the equiline diagram between aqueous fluid and sediment melt that is suggested to be a mixing line rather than an isochron.
Project(s):
Funding:
German Research Foundation (DFG), grant/award no. 5472008: Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas
Coverage:
Latitude: -58.000000 * Longitude: -25.000000
Event(s):
Comment:
The quoted errors are 2 sigma errors.
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Section | Sect | Fretzdorff, Susanne | segment | ||
| 2 | Sample ID | Sample ID | Fretzdorff, Susanne | |||
| 3 | Magnesium oxide | MgO | % | Fretzdorff, Susanne | ||
| 4 | Thorium | Th | mg/kg | Fretzdorff, Susanne | ||
| 5 | Uranium | U | mg/kg | Fretzdorff, Susanne | ||
| 6 | Uranium-238/Thorium-232 ratio | 238U/232Th | Fretzdorff, Susanne | |||
| 7 | Error, absolute | Error a | ± | Fretzdorff, Susanne | 238U/232Th | |
| 8 | Uranium-234/Uranium-238 activity ratio | (234U/238U) | Fretzdorff, Susanne | |||
| 9 | Error, absolute | Error a | ± | Fretzdorff, Susanne | 234U/238U | |
| 10 | Thorium-230/Thorium-232 ratio | 230Th/232Th | Fretzdorff, Susanne | |||
| 11 | Error, absolute | Error a | ± | Fretzdorff, Susanne | 230Th/232Th | |
| 12 | Thorium-230/Uranium-238 ratio | 230Th/238U | Fretzdorff, Susanne | |||
| 13 | Error, absolute | Error a | ± | Fretzdorff, Susanne | 230Th/238U |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
265 data points