A volcanic production rate for the Mariana island arc

James C Sample, D. E. Karig

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

Despite the importance of volcanic production rates along subducting plate boundaries, few reliable values are available. A well-constrained rate has here been determined for the past 5 m.y. in the Mariana island arc. The calculation covers the period during the opening of the Mariana Trough (an active back-arc basin) in which the volcanic centers are located and most volcanic products are contained. About half the extruded volcanic rocks occur in central cones, with the other half in a large volcanicclastic apron. After correction of volumes for porosity and for changes in mineral densities, the average extrusion rate of 12.4 km3/km/m.y. was calculated. The local rate varies along the arc roughly as does the subduction rate. Before quantification of that correlation can be made, however, apparent temporal fluctuations of volcanism on a global scale, which do not appear to be correlated with subduction rates, must be examined and explained.

Original languageEnglish (US)
Pages (from-to)73-82
Number of pages10
JournalJournal of Volcanology and Geothermal Research
Volume13
Issue number1-2
DOIs
StatePublished - 1982
Externally publishedYes

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Volcanic rocks
island arcs
Density (specific gravity)
Minerals
island arc
Extrusion
Cones
volcanology
Porosity
subduction
arcs
extrusion
plate boundary
troughs
rate
volcanism
volcanic rock
cones
trough
porosity

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geophysics

Cite this

A volcanic production rate for the Mariana island arc. / Sample, James C; Karig, D. E.

In: Journal of Volcanology and Geothermal Research, Vol. 13, No. 1-2, 1982, p. 73-82.

Research output: Contribution to journalArticle

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