(Table 1) Composition of volcanic glasses from the East Scotia Ridge, supplement to: Fretzdorff, Susanne; Haase, Karsten M; Leat, Philip; Livermore, Roy A; Garbe-Schönberg, Carl-Dieter; Fietzke, Jan; Stoffers, Peter (2003): 230Th-238U disequilibrium in East Scotia backarc basalts: Implications for slab contributions. Geology, 31(8), 693

DOI

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 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.

The quoted errors are 2 sigma errors.

Identifier
DOI https://doi.org/10.1594/PANGAEA.847689
Related Identifier https://doi.org/10.1130/G19469.1
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.847689
Provenance
Creator Fretzdorff, Susanne; Haase, Karsten M; Leat, Philip; Livermore, Roy A; Garbe-Schönberg, Carl-Dieter; Fietzke, Jan; Stoffers, Peter
Publisher PANGAEA - Data Publisher for Earth & Environmental Science
Publication Year 2003
Funding Reference German Science Foundation
Rights Creative Commons Attribution 3.0 Unported
OpenAccess true
Representation
Language English
Resource Type Supplementary Dataset
Format text/tab-separated-values
Size 265 data points
Discipline Earth System Research
Spatial Coverage (-25.000 LON, -58.000 LAT); Southern Ocean