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dc.contributor.author John A. en_US
dc.contributor.author Joanna S. en_US
dc.contributor.author William T. en_US
dc.contributor.author Nicholas J. G. en_US
dc.date.accessioned 2008-12-17T16:24:46Z
dc.date.available 2008-12-17T16:24:46Z
dc.date.issued 2007 en_US
dc.identifier http://dx.doi.org/10.1002/jqs.1092 en_US
dc.identifier.citation Westgate , J A , Denton , J S , Perkins , W T & Pearce , N J G 2007 , ' Correlation and characterisation of individual glass shards from tephra deposits using trace element laser ablation ICP-MS analyses: current status and future potential ' Journal of Quaternary Science , vol 22 , no. 7 , pp. 721-736 . , 10.1002/jqs.1092 en_US
dc.identifier.other PURE: 95293 en_US
dc.identifier.other dspace: 2160/1755 en_US
dc.identifier.uri http://hdl.handle.net/2160/1755
dc.description.abstract Laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) is a high spatial resolution analytical method which has been applied to the analysis of silicic tephras. With current instrumentation, around 30 trace elements can be determined from single glass shards as small as 40 µm, separated from tephra deposits. As a result of element fractionation during the ablation process using a 266 nm laser, a relatively complex calibration strategy is required. Nonetheless, such a strategy gives analyses which are accurate (typically within ±5%) and have an analytical precision which varies from ±2% at 100 ppm, to ±15% at 1 ppm. Detection limits for elements used in correlation and discrimination studies are well below 1 ppm. Examples of the application of trace element analysis by LA-ICP-MS in tephra studies are presented from the USA, New Zealand and the Mediterranean. Improvements in instrumental sensitivity in recent years have the potential to lower detection limits and improve analytical precision, thus allowing the analysis of smaller glass shards from more distal tephras. Laser systems operating at shorter wavelengths (e.g. 193 nm) are now more widely available, and produce a much more controllable ablation in glasses than 266 nm lasers. Crater sizes of en_US
dc.format.extent 16 en_US
dc.relation.ispartof Journal of Quaternary Science en_US
dc.title Correlation and characterisation of individual glass shards from tephra deposits using trace element laser ablation ICP-MS analyses: current status and future potential en_US
dc.contributor.pbl Institute of Geography & Earth Sciences en_US
dc.contributor.pbl Quaternary Environmental Change Group en_US


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