Late cenozoic structural and tectonic development of the western margin of the central andean plateau in southwest Peru

Taylor F. Schildgen, Kip Hodges, Kelin Whipple, Malcolm S. Pringle, Matthijs Van Soest, Katrina Cornell

Research output: Contribution to journalArticle

47 Citations (Scopus)

Abstract

Structural and thermochronologic studies of the western margin of the central Andean Plateau show changing styles of deformation through time that give insights into tectonic evolution. In southwest Peru, uplift of the plateau proceeded in several distinct phases. First, NW striking, NE dipping reverse faults accommodated uplift prior to ∼ 14-16 Ma. Subsequent uplift of the plateau relative to the piedmont (between the plateau and the Pacific Ocean) occurred between ∼ 14 and 2.2 Ma and was accommodated by NW striking, SW dipping normal faults and subparallel monoclinal folds. The youngest phase of uplift affected the piedmont region and the plateau margin as a coherent block. Although the uplift magnitude associated with phase 1 is unknown, phases 2 and 3 resulted in at least 2.4-3.0 km of uplift. Up to 1 km of this may have occurred during phase 3. Geodynamic processes occurring in both the continental interior and the subduction zone likely contributed to uplift.

Original languageEnglish (US)
Article numberTC4007
JournalTectonics
Volume28
Issue number4
DOIs
StatePublished - Aug 2009

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Geodynamics
Peru
Tectonics
margins
tectonics
plateaus
uplift
plateau
dipping
piedmont
Pacific Ocean
geodynamics
continental interior
reverse fault
tectonic evolution
normal fault
subduction zone
fold
ocean

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geophysics

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Late cenozoic structural and tectonic development of the western margin of the central andean plateau in southwest Peru. / Schildgen, Taylor F.; Hodges, Kip; Whipple, Kelin; Pringle, Malcolm S.; Van Soest, Matthijs; Cornell, Katrina.

In: Tectonics, Vol. 28, No. 4, TC4007, 08.2009.

Research output: Contribution to journalArticle

Schildgen, Taylor F. ; Hodges, Kip ; Whipple, Kelin ; Pringle, Malcolm S. ; Van Soest, Matthijs ; Cornell, Katrina. / Late cenozoic structural and tectonic development of the western margin of the central andean plateau in southwest Peru. In: Tectonics. 2009 ; Vol. 28, No. 4.
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