Tracking exhumation of Andean ranges bounding the Middle Magdalena Valley Basin, Colombia

Junsheng Nie, Brian K. Horton, Andrés Mora, Joel E Saylor, Todd B. Housh, Jorge Rubiano, Julian Naranjo

Research output: Contribution to journalArticle

54 Citations (Scopus)

Abstract

The shortening history of the Andes is important for understanding retroarc deformation along convergent margins and forcing mechanisms of Cenozoic climate. However, the timing of uplift in the northern Andes is poorly constrained, with estimates ranging from Cretaceous to Pliocene. Detrital zircon U-Pb ages from the Middle Magdalena Valley Basin in Colombia reveal two provenance shifts during Cenozoic time. The fishrst shift occurs between early and late Paleocene strata, where U-Pb results show a switch from Proterozoic-dominated to Phanerozoic-dominated age spectra. We attribute this change to uplift-related exhumation of the Central Cordillera. The second shift occurs between middle-late Eocene and late Oligocene strata, where increased Grenville ages and diminished Mesozoic ages can be linked to uplift of the Eastern Cordillera. Our results show that signifishcant pre-Neogene deformation affected the northern Andes, underscoring the potential importance of Andean uplift on the dynamics of Paleogene climate.

Original languageEnglish (US)
Pages (from-to)451-454
Number of pages4
JournalGeology
Volume38
Issue number5
DOIs
StatePublished - May 2010
Externally publishedYes

Fingerprint

exhumation
uplift
valley
cordillera
basin
convergent margin
climate
Phanerozoic
Paleogene
Paleocene
Neogene
provenance
Oligocene
Proterozoic
Pliocene
Eocene
zircon
Cretaceous
history

ASJC Scopus subject areas

  • Geology

Cite this

Nie, J., Horton, B. K., Mora, A., Saylor, J. E., Housh, T. B., Rubiano, J., & Naranjo, J. (2010). Tracking exhumation of Andean ranges bounding the Middle Magdalena Valley Basin, Colombia. Geology, 38(5), 451-454. https://doi.org/10.1130/G30775.1

Tracking exhumation of Andean ranges bounding the Middle Magdalena Valley Basin, Colombia. / Nie, Junsheng; Horton, Brian K.; Mora, Andrés; Saylor, Joel E; Housh, Todd B.; Rubiano, Jorge; Naranjo, Julian.

In: Geology, Vol. 38, No. 5, 05.2010, p. 451-454.

Research output: Contribution to journalArticle

Nie, J, Horton, BK, Mora, A, Saylor, JE, Housh, TB, Rubiano, J & Naranjo, J 2010, 'Tracking exhumation of Andean ranges bounding the Middle Magdalena Valley Basin, Colombia', Geology, vol. 38, no. 5, pp. 451-454. https://doi.org/10.1130/G30775.1
Nie, Junsheng ; Horton, Brian K. ; Mora, Andrés ; Saylor, Joel E ; Housh, Todd B. ; Rubiano, Jorge ; Naranjo, Julian. / Tracking exhumation of Andean ranges bounding the Middle Magdalena Valley Basin, Colombia. In: Geology. 2010 ; Vol. 38, No. 5. pp. 451-454.
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