PB and O isotopic constraints on the source of granitic rocks from the Cape Breton Island...

Reports that Pb isotopic data from the Blair River Complex of leached feldspars on Breton Island, Nova Scotia, Canada are consistent with an old source region ultimately derived from the mantle and contaminated by sialic crust. Geological setting and sample distribution; Analytical methods; Pb Isotopic data; Oxygen isotopic data; Pb and O isotopic variations in Cape Breton Island; Regional comparisons; Conclusions.