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Petrology of the Rumble seamounts, southern Kermadec Ridge, southwest Pacific (1988)

Smith, I. E. M. ; Brothers, R. N.

Springer

Bulletin of volcanology 50 (1988), S. 139-147

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ISSN: 1432-0819

Source: Springer Online Journal Archives 1860-2000

Topics: Geosciences

Notes: Abstract The Rumble seamounts are major Quaternary submarine volcanoes which lie at the southern end of the Tonga-Kermadec island arc. Rocks dredged from three of the volcanoes are olivine and pyroxene phyric basalts and highly por-phyritic plagioclase-rich basaltic andesites. Plagioclase phenocrysts display patterns of iron enrichment similar to those observed in rocks from other parts of the arc. Systematic major and trace element variations indicate that the specimens constitute a closely related suite of low-K arc-type rocks showing characteristic depletion in some large ion lithophile elements. They are closely comparable to basaltic rocks of the Kermadec Islands and their genesis may be linked to the currently active subduction system beneath the arc.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF01079678

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