title: Archean rocks in antarctica: 2.5-billion-year uranium-lead ages of pegmatites in enderby land.
abstract: Uranium-lead isotopic data indicate that the granulite-facies Napier complex of Enderby Land, Antarctica, was cut by charnockitic pegmatites 2.5 billion years ago and by pegmatites lacking hypersthene 0.52 billion years ago. The 4-bil-lion-years lead-lead ages (whole rock) reported for the Napier complex are rejected since these leads developed in three stages. Reconstructions of Gondwanaland suggest that the Napier complex may be a continuation of the Archean granulitic terrain of southern India.
authors.forename: E S
authors.initials: ES
authors.lastname: Grew
authors.forename: W I
authors.initials: WI
authors.lastname: Manton