The relationships between pre- to syn-Pampean orogeny metasedimentary rocks in the Eastern sierras Pampeanas (Argentina)
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Date
2014Author
Casquet, C.
Rapela, C.
Baldo, E.
Pankhurst, R.
Galindo, C.
Verdecchia, S.
Murra, J.
Dahlquist, J.
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Two series of pre-to syn-Pampean orogeny metasedimentary rocks can be distinguished in
the Sierras Pampeanas on the basis of U-Pb SHRIMP detrital zircon ages. On one hand the
Ancaján series consists of meta-siliciclastic rocks (metapsammites and metapelites) and marbles.
These have a Grenville Zr age pattern (1.0–1.3Ga) with contributions from the trans-Laurentian
granite province (~ 1.3–1.5 Ga) (Rapela et al., 2014; this symposium).