Surface uplift in the Central Andes driven by growth of the Altiplano Puna Magma Body

Jonathan P. Perkins, Kevin M. Ward, Shanaka L. De Silva, George Zandt, Susan Beck, Noah J. Finnegan

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

The Altiplano-Puna Magma Body (APMB) in the Central Andes is the largest imaged magma reservoir on Earth, and is located within the second highest orogenic plateau on Earth, the Altiplano-Puna. Although the APMB is a first-order geologic feature similar to the Sierra Nevada batholith, its role in the surface uplift history of the Central Andes remains uncertain. Here we show that a long-wavelength topographic dome overlies the seismically measured extent of the APMB, and gravity data suggest that the uplift is isostatically compensated. Isostatic modelling of the magmatic contribution to dome growth yields melt volumes comparable to those estimated from tomography, and suggests that the APMB growth rate exceeds the peak Cretaceous magmatic flare-up in the Sierran batholith. Our analysis reveals that magmatic addition may provide a contribution to surface uplift on par with lithospheric removal, and illustrates that surface topography may help constrain the magnitude of pluton-scale melt production.

Original languageEnglish (US)
Article number13185
JournalNature Communications
Volume7
DOIs
StatePublished - Oct 25 2016

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Domes
magma
Earth (planet)
Gravitation
Surface topography
Growth
Tomography
domes
Wavelength
flares
plateaus
topography
tomography
histories
gravitation
wavelengths

ASJC Scopus subject areas

  • Chemistry(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Physics and Astronomy(all)

Cite this

Surface uplift in the Central Andes driven by growth of the Altiplano Puna Magma Body. / Perkins, Jonathan P.; Ward, Kevin M.; De Silva, Shanaka L.; Zandt, George; Beck, Susan; Finnegan, Noah J.

In: Nature Communications, Vol. 7, 13185, 25.10.2016.

Research output: Contribution to journalArticle

Perkins, Jonathan P. ; Ward, Kevin M. ; De Silva, Shanaka L. ; Zandt, George ; Beck, Susan ; Finnegan, Noah J. / Surface uplift in the Central Andes driven by growth of the Altiplano Puna Magma Body. In: Nature Communications. 2016 ; Vol. 7.
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