Sediment provenance variations during contrasting Mesozoic-early Cenozoic tectonic regimes of the northern Peruvian Andes and Santiago-Marañón foreland basin

Sarah W.M. George, Brian K. Horton, Lily J. Jackson, Federico Moreno, Victor Carlotto, Carmala N. Garzione

Research output: Chapter in Book/Report/Conference proceedingChapter

21 Scopus citations

Abstract

Diverse tectonic regimes and the onset of Andean shortening are chronicled in principally nonmarine clastic deposits of Triassic through Paleogene age in the Eastern Cordillera, Subandean Zone, and Santiago-Marañón foreland basin of northern Peru. Detrital zircon U-Pb geochronological results for 16 sedimentary rock samples from a ~5km thick stratigraphic succession provide a framework to establish new depositional age constraints, infer sediment provenance, and reconstruct sediment routing systems through time. Integration of these results with U-Pb ages from metasedimentary basement samples, additional provenance data, facies distributions, and structural constraints support reconstructions of basin evolution involving: (1) Middle Triassic-Jurassic extension and post-rift thermal subsidence; (2) Late Jurassic-earliest Cretaceous unconformity development; (3) Early Cretaceous renewed regional subsidence; (4) latest Cretaceous shortening-induced flexural subsidence; and (5) Paleogene growth and advance of an integrated flexural foreland basin system.

Original languageEnglish (US)
Title of host publicationAndean Tectonics
PublisherElsevier Inc.
Pages269-296
Number of pages28
ISBN (Electronic)9780128160091
ISBN (Print)9780128160107
DOIs
StatePublished - Jan 1 2019
Externally publishedYes

Keywords

  • Andes
  • Arc magmatism
  • Foreland basin
  • Peru
  • Provenance
  • U-Pb geochronology

ASJC Scopus subject areas

  • General Earth and Planetary Sciences

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