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Nd isotopic compositions for ten samples from the State Farm Gneiss (ca. 1046–1023 Ma), the Montpelier Anorthosite (1045 Ma), and several Neoproterozoic Atype granitoids (ca. 600 Ma) in the Mesoproterozoic Goochland terrane range in initial εNd from −0.4 to +1.3. The A-type granitoids reflect Neoproterozoic rifting of the Goochland terrane, and their isotopic compositions are consistent with a substantial contribution from the State Farm Gneiss, or equivalent crust at depth, in their petrogenesis. Protoliths of the State Farm Gneiss and Montpelier Anorthosite were emplaced at approximately the same time, and their Nd isotopic compositions are the same. Based on...

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