The evolution of deformation and topography of high elevated plateaus 2. Application to the Central Andes

Shimon Wdowinski, Y. Bock

Research output: Contribution to journalArticle

40 Citations (Scopus)

Abstract

The central Andes form a wide elevated plateau flanked in the west by a steep slope toward the deep Chilean Trench and in the east by a gentle slope that subsides gradually toward the Brazilian Shield. The low elevated trench topography is dynamically supported, whereas the high Andean mountain topography is mostly isostatically supported by a thick crust. The time evolution of the Andean deformation and topography is investigated by applying a temperature dependent viscoplastic flow model of continental lithosphere to the South American plate. The model predicts the observed present-day topographic profile across the central Andes. The results suggest that the Altiplano developed and extended to its present width of 400km as a result of thermal weakening of the lithosphere since late Oligocene until present. The model also predicts the observed eastward migration of the locus of the Andean crustal deformation with time. -from Authors

Original languageEnglish (US)
Pages (from-to)7121-7130
Number of pages10
JournalJournal of Geophysical Research
Volume99
Issue numberB4
DOIs
StatePublished - 1994
Externally publishedYes

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Topography
plateaus
topography
plateau
lithosphere
trench
viscoplasticity
slopes
crustal deformation
continental lithosphere
loci
mountains
Oligocene
shield
crusts
crust
mountain
profiles
temperature
Temperature

ASJC Scopus subject areas

  • Earth and Planetary Sciences(all)
  • Environmental Science(all)

Cite this

The evolution of deformation and topography of high elevated plateaus 2. Application to the Central Andes. / Wdowinski, Shimon; Bock, Y.

In: Journal of Geophysical Research, Vol. 99, No. B4, 1994, p. 7121-7130.

Research output: Contribution to journalArticle

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