Cross-Arc Geochemical Variations in the Kurile Island Arc as a Function of Slab Depth

Jeffrey G. Ryan, Julie Morris, Fouad Tera, William P. Leeman, Andrei Tsvetkov

Research output: Contribution to journalArticlepeer-review

Abstract

Lavas from transects across the Kurile Islands arc showed geochemical variations related to changes in the compositions of fluids derived from the subducting slab. Enrichment factors for boron, cesium, arsenic, and antimony, all elements with strong affinities for water, decreased across the arc. This decrease is presumably related to losses of water-rich fluids during the dehydration of the subducting plate. Enrichments of potassium, barium, beryllium-10, and the light rare earth elements remained constant; these species may move in silica-rich fluids liberated from the slab at greater depths.

Original languageAmerican English
JournalScience
Volume270
DOIs
StatePublished - Oct 1 1995

Keywords

  • Kurile Islands
  • Geochemistry

Disciplines

  • Earth Sciences
  • Geochemistry
  • Geology
  • Physical Sciences and Mathematics

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