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| Titel |
Heat flow in the Lesser Antilles island arc and adjacent back arc Grenada basin |
| VerfasserIn |
Michael Manga, Matt Hornbach, Anne Le Friant, Osamu Ishizuka |
| Konferenz |
EGU General Assembly 2014
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 16 (2014) |
| Datensatznummer |
250088421
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| Publikation (Nr.) |
 EGU/EGU2014-2523.pdf |
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| Zusammenfassung |
| Using temperature gradients measured in 10 holes at 6 sites, we generate the first
high fidelity heat flow measurements from Integrated Ocean Drilling Program drill
holes across the northern and central Lesser Antilles arc and back arc Grenada
basin. The implied heat flow, after correcting for bathymetry and sedimentation
effects, ranges from about 0.1 W/m2 on the crest of the arc, midway between the
volcanic islands of Montserrat and Guadeloupe, to < 0.07 W/m2 at distances > 15 km
from the crest in the back arc direction. Combined with previous measurements,
we find that the magnitude and spatial pattern of heat flow are similar to those at
continental arcs. The heat flow in the Grenada basin to the west of the active arc is 0.06
W/m2, a factor of 2 lower than that found in the previous and most recent study.
There is no thermal evidence for significant shallow fluid advection at any of these
sites. Present day volcanism is confined to the region with the highest heat flow. |
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