Early Paleozoic construction of southwest Gondwana: evidence from detrital zircons in the Sierras Pampeanas
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Date
2014Author
Washington, C. W.
Verdecchia, S. O.
Casquet, C.
R. J., Pankhurst
Baldo, E. G.
Galindo, C.
Murra, J. A.
Dahlquist, J. A.
Fanning, C. M.
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Show full item recordAbstract
Basement exposures in the Sierras Pampeanas at 26º–33ºS give a unique opportunity to compare
paleo-sediment sources along a significant stretch of the Andean foreland. To this end we have
studied a large number of widespread samples using U-Pb SHRIMP age determination of
detrital zircons, coupled with identically-located Hf and O determinations. The study includes
comparison with neighbouring sectors in NW Argentina and Patagonia, and inferred sources in
Eastern Laurentia, Southern Africa and East Antarctica.