Evolution of the tertiary volcanic rocks in the Izu-Mariana arc

K. Shiraki, N. Kuroda, S. Maruyama, H. Urano

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

Petrological evolution of the Tertiary island arc in the Izu-Mariana region has been accompanied by the development of three different volcanic suites: 1) oceanridge basalt now exposed as the metamorphic basement on Yap; 2) island-arc tholeiites of Eocene to early Oligocene age characterized by low contents of incompatible elements at all levels of silica enrichment; and 3) calc-alkalic rocks of late Oligocene to early Miocene age showing higher contents of silica and incompatible elements. All these three suites have primitive, undifferentiated basalts or andesites (boninites) characterized by high Mg/Fe, Cr, and Ni, suggesting that they have been derived from an upper mantle peridotite at relatively high temperatures. The earliest volcanism appears to have occurred at a spreading ridge. Later, as subduction proceeded, the island-arc tholeiite magma may have been produced by the introduction of a smaller amount of water into the locus of fusion from the subducted oceanic crust. An increasingly larger amount of water introduced into the same region could have led to the development of the more siliceous, calc-alkalic magma, as represented typically by the boninite.

Original languageEnglish
Pages (from-to)548-562
Number of pages15
JournalBulletin Volcanologique
Volume41
Issue number4
DOIs
Publication statusPublished - Dec 1978
Externally publishedYes

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Volcanic rocks
island arcs
Silicon Dioxide
island arc
volcanology
volcanic rock
arcs
rocks
basalt
magma
Water
Oligocene
silica
boninite
silicon dioxide
Fusion reactions
tholeiite
andesite
peridotite
Rocks

ASJC Scopus subject areas

  • Geophysics
  • Geochemistry and Petrology

Cite this

Evolution of the tertiary volcanic rocks in the Izu-Mariana arc. / Shiraki, K.; Kuroda, N.; Maruyama, S.; Urano, H.

In: Bulletin Volcanologique, Vol. 41, No. 4, 12.1978, p. 548-562.

Research output: Contribution to journalArticle

Shiraki, K, Kuroda, N, Maruyama, S & Urano, H 1978, 'Evolution of the tertiary volcanic rocks in the Izu-Mariana arc', Bulletin Volcanologique, vol. 41, no. 4, pp. 548-562. https://doi.org/10.1007/BF02597386
Shiraki, K. ; Kuroda, N. ; Maruyama, S. ; Urano, H. / Evolution of the tertiary volcanic rocks in the Izu-Mariana arc. In: Bulletin Volcanologique. 1978 ; Vol. 41, No. 4. pp. 548-562.
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