Decelerating Nazca-South America and Nazca-Pacific plate motions

Details Decelerating Nazca-South America and Nazca-Pacific plate motions Decelerating Nazca-South America and Nazca-Pacific plate motions

Nov 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999georl..26.3405n&link_type=abstract

Geophysical Research Letters, Volume 26, Issue 22, p. 3405-3408

Physics

Geophysics

54

Geodesy And Gravity: Space Geodetic Surveys, Marine Geology And Geophysics: Plate Tectonics, Tectonophysics: Plate Motions-General, Information Related To Geographic Region: South America

Scientific paper

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.

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