Decelerating Nazca-South America and Nazca-Pacific plate motions

Edmundo O. Norabuena*, Timothy H. Dixon, Seth Stein, Christopher G.A. Harrison

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

145 Scopus citations


Space geodetic estimates of the rate of Nazca-South America convergence and Nazca-Pacific spreading averaging over several years show that present day rates are significantly slower than the 3 million year average NUVEL-1A model. The implied rates of deceleration are consistent with longer term trends extending back to at least 20 Ma, about the time of initiation of Andes growth, and may reflect consequences of ongoing subduction and construction of the Andes, e.g., increased friction and viscous drag on the subducted slab as the leading edge of South America thickens.

Original languageEnglish (US)
Pages (from-to)3405-3408
Number of pages4
JournalGeophysical Research Letters
Issue number22
StatePublished - Nov 15 1999

ASJC Scopus subject areas

  • Geophysics
  • General Earth and Planetary Sciences


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