Quickening the pulse: Fractal tempos in continental arc magmatism

Shanaka L. De Silva, Nancy R Riggs, Andrew P. Barth

Research output: Contribution to journalArticle

51 Citations (Scopus)

Abstract

The magmatic history of a continental arc can be characterized as punctuated equilibrium, whereby long periods of low-level activity are interrupted periodically by short bursts of high-volume magmatism ("flare-ups"). Geochronological records, most notably from zircon, reveal episodicity in volcanism, pluton formation, and detrital sedimentation in, and associated with, arc segments and volcano-plutonic suites. Distinct tempos can be recognized at all resolvable spatial and temporal scales and are broadly fractal, with each scale reflecting the timescale of p rocesses occurring at different levels in the arc crust. The tempos of continental arc magmatism thus reflect modulation of the mantle-power input as it is progressively filtered through the continental crust.

Original languageEnglish (US)
Pages (from-to)113-118
Number of pages6
JournalElements
Volume11
Issue number2
DOIs
StatePublished - Apr 1 2015

Fingerprint

continental arc
Volcanoes
Sedimentation
Fractals
magmatism
Modulation
punctuated equilibrium
continental crust
pluton
volcanism
zircon
volcano
sedimentation
crust
mantle
timescale
history

Keywords

  • Continental arc flare-ups
  • Episodes
  • Magmatic history
  • Tempos
  • U-Pb in zircon geochronology

ASJC Scopus subject areas

  • Earth and Planetary Sciences (miscellaneous)
  • Geochemistry and Petrology

Cite this

Quickening the pulse : Fractal tempos in continental arc magmatism. / De Silva, Shanaka L.; Riggs, Nancy R; Barth, Andrew P.

In: Elements, Vol. 11, No. 2, 01.04.2015, p. 113-118.

Research output: Contribution to journalArticle

De Silva, Shanaka L. ; Riggs, Nancy R ; Barth, Andrew P. / Quickening the pulse : Fractal tempos in continental arc magmatism. In: Elements. 2015 ; Vol. 11, No. 2. pp. 113-118.
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