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High spatial 40Ar/39Ar dating of pseudotachylites: evidence for multiple phases of faulting within basement gneisses of the Outer Hebrides (UK)

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Pseudotachylites within the Neoarchaean to Palaeoproterozoic basement of the Lewisian Gneiss Complex have been analysed using the high spatial resolution 40Ar/39Ar UV laserprobe technique. It has been possible to measure 40Ar/39Ar age and ‘apparent' age variations that would be beyond resolution by lower spatial resolution or bulk 40Ar/39Ar dating methods. We report a range of complexities including significantly younger narrow (
Original languageEnglish
Pages (from-to)1049-1059
Number of pages11
JournalJournal of the Geological Society
Issue number6
Publication statusPublished - Dec 2009

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