Zircon rock dating website


26-Apr-2016 11:30

Both contain muscovite, chlorite, quartz and plagioclase with occasional pyrite (up to 3 mm).

Samples with the prefix ‘Dh’ are from the Cove area on the Rosneath peninsula (Grid Ref.

Lack of suitable standards precluded the analysis of REE and actinides.

Minor contamination by matrix minerals or micro-inclusions was recognized by consistent and predictable deviation from overall trends in a range of chemical plots, and such data were excluded.

zircon rock dating website-89

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In situ back-scattered electron, cathodoluminescence, electron backscatter diffraction and chemical analyses show that altered zircon is porous, weakly luminescent, enriched in non-formula elements such as Al and Fe, and is associated with fractures within the host zircon.EDX scanned chemical maps were obtained at 512 × 400 resolution.To assess the relative proportions of zircon types, single grains were characterized using the SEM, by point counting in transects perpendicular to layering at ×50 magnification.Samples with the prefix ‘Bal’ are from Ballachulish (Grid Ref. Samples with the prefix ‘E’ are finely laminated Easdale slates from the Argyll Group (Grid Ref.

NS 218 831) including a well-cleaved black graphitic slate and a carbonate-cemented slate with a poorly defined cleavage.

Greenschist-facies metasedimentary rocks were sampled from the Late Proterozoic Dalradian Supergroup in the Scottish Highlands (Table 1).



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