title: Two-billion-year granulites in the late precambrian metamorphic basement along the southern peruvian coast.
abstract: Uranium-lead data indicate that the high-pressure granulitic and charnockitic nuclei within the medium-grade metamorphic complex of the Peruvian coastal area must be related to an orogenic event 2 x 10(9) years ago. As in western Africa and Brazil, this old granulitic basement is reworked by Late Precambrian orogeny. Its presence along the Peru-Chile Trench must be taken into account in interpreting the anomalously high strontium isotopic ratios of recent calc-alkaline volcanism.
authors.forename: B
authors.initials: B
authors.lastname: Dalmayrac
authors.forename: J R
authors.initials: JR
authors.lastname: Lancelot
authors.forename: A
authors.initials: A
authors.lastname: Leyreloup