Channelized melt flow in downwelling mantle: Implications for 226Ra-210Pb disequilibria in arc magmas

Nick Petford, M A Koenders, S Turner

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Abstract

We present the results of an analytical model of porous flow of viscous melt into a steadily dilating "channel" (defined as a cluster of smaller veins) in downwelling subarc mantle. The model predicts the pressure drop in the mantle wedge matrix surrounding the channel needed to drive melt flow as a function of position and time.
Original languageEnglish
JournalJournal of Geophysical Research. Solid Earth
Volume113
Issue numberB11202
DOIs
Publication statusPublished - 1 Nov 2008

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downwelling
disequilibrium
melt
mantle
pressure drop
matrix

Keywords

  • mantle
  • subduction
  • short-lived isotopes
  • melt flow
  • melt segregation

Cite this

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Channelized melt flow in downwelling mantle: Implications for 226Ra-210Pb disequilibria in arc magmas. / Petford, Nick; Koenders, M A; Turner, S.

In: Journal of Geophysical Research. Solid Earth, Vol. 113, No. B11202, 01.11.2008.

Research output: Contribution to journalArticleResearch

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T1 - Channelized melt flow in downwelling mantle: Implications for 226Ra-210Pb disequilibria in arc magmas

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AU - Koenders, M A

AU - Turner, S

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AB - We present the results of an analytical model of porous flow of viscous melt into a steadily dilating "channel" (defined as a cluster of smaller veins) in downwelling subarc mantle. The model predicts the pressure drop in the mantle wedge matrix surrounding the channel needed to drive melt flow as a function of position and time.

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KW - subduction

KW - short-lived isotopes

KW - melt flow

KW - melt segregation

U2 - 10.1029/2007JB005563

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JO - Journal of Geophysical Research. Solid Earth

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