Depositional age of Jurassic epithermal gold-silver ore in the Deseado Massif, Patagonia, Argentina, based on Manantial Espejo and La Josefina prospects

P. Moreira, H. Echeveste, R. Fernandez, L.A. Hartmann, I. Schalamuk, Joao Santos

    Research output: Contribution to journalArticlepeer-review

    13 Citations (Scopus)

    Abstract

    Middle to Upper Jurassic bimodal volcanism developed during widespread extensional tectonism within the Deseado Massif in Argentinean Patagonia. This geologic environment led to the formation of numerous epithermal gold-silver deposits that are spatially and temporally related to the volcanic activity. The age constraints of the volcanic rocks that host the veins define Upper Jurassic ages for the volcanism. New U-Pb SHRIMP studies of zircons from ignimbrites from Manantial Espejo and La Josefina epithermal prospects are reported. The Manantial Espejo prospect dates (∼ 167, ∼ 163 and 158.9 ± 0.45 Ma) suggest that mineralization took place 6 My after the deposition of the host rock. The zircons of La Josefina prospect show a concordant age of 152.7 ± 2.3 Ma that suggests temporal overlapping between volcanism and mineralization.
    Original languageEnglish
    Pages (from-to)25-40
    JournalNeues Jahrbuch Fur Geologie Und Palaontologie-Abhandlungen
    Volume253
    Issue number1
    DOIs
    Publication statusPublished - 2009

    Fingerprint

    Dive into the research topics of 'Depositional age of Jurassic epithermal gold-silver ore in the Deseado Massif, Patagonia, Argentina, based on Manantial Espejo and La Josefina prospects'. Together they form a unique fingerprint.

    Cite this