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Volcanism in Response to Plate Flexure

Record type: Article

Volcanism on Earth is known to occur in three tectonic settings: divergent plate boundaries (such as mid-ocean ridges), convergent plate boundaries (such as island arcs), and hot spots. We report volcanism on the 135 million-year-old Pacific Plate not belonging to any of these categories. Small alkalic volcanoes form from small percent melts and originate in the asthenosphere, as implied by their trace element geochemistry and noble gas isotopic compositions. We propose that these small volcanoes erupt along lithospheric fractures in response to plate flexure during subduction. Minor extents of asthenospheric melting and the volcanoes' tectonic alignment and age progression in the direction opposite to that of plate motion provide evidence for the presence of a small percent melt in the asthenosphere

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Citation

Hirano, N., Takahashi, E., Yamamoto, J., Abe, N., Ingle, S.P., Kaneoka, I., Hirata, T., Kimura, J., Ishii, T., Ogawa, Y., Machida, S. and Suyehiro, K. (2006) Volcanism in Response to Plate Flexure Science, 313, (5792), pp. 1426-1428. (doi:10.1126/science.1128235).

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Published date: 2006

Identifiers

Local EPrints ID: 48703
URI: http://eprints.soton.ac.uk/id/eprint/48703
ISSN: 0036-8075
PURE UUID: 1c1cabb6-5eb8-4b0a-a751-38c65e44cf97

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Date deposited: 09 Oct 2007
Last modified: 17 Jul 2017 14:58

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Contributors

Author: N. Hirano
Author: E. Takahashi
Author: J. Yamamoto
Author: N. Abe
Author: S.P. Ingle
Author: I. Kaneoka
Author: T. Hirata
Author: J. Kimura
Author: T. Ishii
Author: Y. Ogawa
Author: S. Machida
Author: K. Suyehiro

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