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Trace element variations in olivine phenocrysts from Ugandan potassic rocks as clues to the chemical characteristics of parental magmas

Foley, Stephen; Jacob, D.E.; O'Neill, Hugh


Olivine phenocrysts in ugandite and leucite basanite from the western branch of the East African Rift have been analysed for up to 34 trace elements by Laser-ICP-MS with detection limits as low as 1 ppb. A combination of point analyses with varying ablation crater diameters and line scans allow the identification of subtle zonations from core to rim, as well as characterization of the chemical effects of contamination along cracks. Trace element concentrations are remarkably uniform between...[Show more]

CollectionsANU Research Publications
Date published: 2010
Type: Journal article
Source: Contributions to Mineralogy and Petrology
DOI: 10.1007/s00410-010-0579-y


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