How does the Nazca Ridge subduction influence the modern Amazonian foreland basin?

N. Espurt, P. Baby, S. Brusset, M. Roddaz, W. Hermoza, V. Regard, P. O. Antoine, R. Salas-Gismondi, R. Bolaños

Research output: Contribution to journalArticle

108 Scopus citations

Abstract

The subduction of an aseismic ridge has important consequences on the dynamics of the overriding upper plate. In the central Andes, the Nazea Ridge subduction imprint can be tracked on the eastern side of the Andes. The Fitzcarrald arch is the long-wavelength topography response of the Nazca Ridge flat subduction, 750 km inboard of the trench. This uplift is responsible for the atypical three-dimensional shape of the Amazonian foreland basin. The Fitzcarrald arch uplift is no older than Pliocene as constrained by the study of Neogene sediments and geomorphic markers, according to the kinematics of the Nazca Ridge subduction.
Original languageAmerican English
Pages (from-to)515-518
Number of pages4
JournalGeology
Volume35
Issue number6
DOIs
StatePublished - 1 Jun 2007

Keywords

  • Amazonian foreland basin
  • Fitzcarrald arch
  • Flat subduction
  • Nazca Ridge
  • Neogene

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    Espurt, N., Baby, P., Brusset, S., Roddaz, M., Hermoza, W., Regard, V., Antoine, P. O., Salas-Gismondi, R., & Bolaños, R. (2007). How does the Nazca Ridge subduction influence the modern Amazonian foreland basin? Geology, 35(6), 515-518. https://doi.org/10.1130/G23237A.1