Mantle flow, volatiles, slab-surface temperatures and melting dynamics in the north Tonga arc-Lau back-arc basin
نویسندگان
چکیده
منابع مشابه
Submarine back-arc lava with arc signature: Fonualei Spreading Center, northeast Lau Basin, Tonga
[1] We present major, volatile, and trace elements for quenched glasses from the Fonualei Spreading Center, a nascent spreading system situated very close to the Tofua Volcanic Arc (20 km at the closest), in the northeast Lau Basin. The glasses are basalts and basaltic andesites and are inferred to have originated from a relatively hot and depleted mantle wedge. The Fonualei Spreading Center sh...
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The mantle wedge of a subduction zone is characterized by low seismic velocities and high attenuation, indicative of temperatures approaching the solidus and the possible presence of melt and volatiles. Tomographic images show a low velocity region above the slab extending from 150 km depth up to the volcanic front. The low velocities result at least partially from volatiles fluxed off the slab...
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ژورنال
عنوان ژورنال: Journal of Geophysical Research: Solid Earth
سال: 2012
ISSN: 0148-0227
DOI: 10.1029/2012jb009526