SHRIMP U-Pb zircon dating of Pedras Grandes Suite, southern Santa Catarina State, Brazil

A.R. Jelinek, A.C. Bastos-Neto, J.A.D. Leite, L.A. Hartmann, Neal Mcnaughton

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    Abstract

    Two major magmatic pulses of the granitic Florianopolis Batholith in Santa Catarina State. southern Brazil, occurred between 613 +/- 5 Ma and 595 +/- 5 Ma, during the Neoproterozoic Brasiliano Cycle. These ages were obtained by U-Pb isotopic determinations with the sensitive high mass-resolution ion microprobe on igneous zircons from Pedras Grandes Suite in Santa Catarina State. Euhedral zircons remained unaltered close to a fluorite vein deposited at 180degreesC or more. These ages suggest a northern limit for the Pedras Grandes; Suite, explaining the spatial relationship between the fluorite veins and the source rock.
    Original languageEnglish
    Pages (from-to)online - approx 5-20pp
    JournalAnais da Academia Brasileira de Ciências
    Volume77
    Issue number1
    Publication statusPublished - 2005

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    Jelinek, A. R., Bastos-Neto, A. C., Leite, J. A. D., Hartmann, L. A., & Mcnaughton, N. (2005). SHRIMP U-Pb zircon dating of Pedras Grandes Suite, southern Santa Catarina State, Brazil. Anais da Academia Brasileira de Ciências, 77(1), online - approx 5-20pp.