Grenvillian massif-type anorthosites in the Sierras Pampeanas

C. Casquet*, R. J. Pankhurst, C. W. Rapela, C. Galindo, J. Dahlquist, E. Baldo, J. Saavedra, J. M.González Casado, C. M. Fanning

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    51 Citations (Scopus)

    Abstract

    We report the discovery of massif-type anorthosites in the Andean basement of the Western Sierras Pampeanas of Argentina. U-Pb zircon dating (by sensitive high-resolution ion microprobe) of a cogenetic gabbronorite dyke yields ages of 1070 ± 41 Ma for igneous emplacement and 431 ± 40 Ma for metamorphism. These anorthosites are petrologically and geochemically comparable with those of the Grenville province of Laurentia. Palaeogeographical reconstructions of Rodinia at 1.0-1.1 Ga suggest that the Sierras Pampeanas anorthosites were part of a large anorthosite province in the late Mesoproterozoic.

    Original languageEnglish
    Pages (from-to)9-12
    Number of pages4
    JournalJournal of the Geological Society
    Volume162
    Issue number1
    DOIs
    Publication statusPublished - Jan 2005

    Fingerprint

    Dive into the research topics of 'Grenvillian massif-type anorthosites in the Sierras Pampeanas'. Together they form a unique fingerprint.

    Cite this