Heat flow in the Lesser Antilles island arc and adjacent back arc Grenada basin

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 bathy...

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Published in:Geochemistry, geophysics, geosystems : G3 geophysics, geosystems : G3, 2012-08, Vol.13 (8), p.np-n/a
Main Authors: Manga, Michael, Hornbach, Matthew J., Le Friant, Anne, Ishizuka, Osamu, Stroncik, Nicole, Adachi, Tatsuya, Aljahdali, Mohammed, Boudon, Georges, Breitkreuz, Christoph, Fraass, Andrew, Fujinawa, Akihiko, Hatfield, Robert, Jutzeler, Martin, Kataoka, Kyoko, Lafuerza, Sara, Maeno, Fukashi, Martinez-Colon, Michael, McCanta, Molly, Morgan, Sally, Palmer, Martin R., Saito, Takeshi, Slagle, Angela, Stinton, Adam J., Subramanyam, K. S. V., Tamura, Yoshihiko, Talling, Peter J., Villemant, Benoit, Wall-Palmer, Deborah, Wang, Fei
Format: Article
Language:English
Subjects:
Arc heating
back arc
Basins
Earth Sciences
Fluid dynamics
Fluid flow
Grenada basin
heat flow
Heat transfer
Heat transmission
IODP
Islands
Lesser Antilles
Sciences of the Universe
volcanic arc
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Summary: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 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. Key Points Heat flow in the Lesser Antilles is similar to other volcanic arcs No evidence for subsurface fluid flow Volcanism is confined to the region with high heat flow
ISSN:1525-2027
1525-2027
DOI:10.1029/2012GC004260