Basalt Standard Chemistry.
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BHVO-2 standard was shot n = 43 at the green setting (40 kv, 8microamps) and n = 3 at the vacuum setting (15 kv, 15microamps). High relative standard deviation (RSD) in Rb is due a known problem of high variance in quantitative data when concentrations are low. These elements were used to assign obsidian artefacts to their likely geological source, see Document S1 for a full account of geochemistry.
创建时间：
2014-01-08
