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This site is maintained by the MARGINS Office. Please share your comments and suggestions with us.
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Browse MARGINS
Awards in reverse chronological order after start
date (most recent first):
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Collaborative Research: Imaging the Mantle in the Central American
Subduction Factory
| MARGINS Focus Area |
Subduction
Factory |
| NSF Org |
OCE |
| Latest Amendment Date |
March 29, 2002 |
| Award Number |
0203650 |
| Award Instrument |
Standard Grant |
| Program Manager |
Rodey Batiza
OCE DIVISION OF OCEAN SCIENCES
GEO DIRECTORATE FOR GEOSCIENCES |
| Start Date |
April 1, 2002 |
| Expires |
March 31, 2005 (Estimated) |
| Expected Total Amount |
$478,134 (Estimated) |
| Investigator |
Geoffrey A. Abers (Principal
Investigator current)
Terry A. Plank (Co-Principal
Investigator current) |
| Sponsor |
Boston University
881 Commonwealth Avenue
Boston, MA 021182394 |
| NSF Program |
1620 MARINE GEOLOGY AND GEOPHYSICS |
| Field Application |
0204000 Oceanography |
| Abstract |
This award is for an 18 month deployment of 43 PASSCAL broad band
seismometers in Nicaragua and Costa Rica to seismically image the
mantle "subduction factory" of the Central American volcanic arc
in the region. In addition to the PASSCAL instruments, the PIs will
also collaborate with Costa Rican and Nicaraguan seismologists to
use data from existing short period and broadband instruments. The
experiment will image the mantle wedge with receiver functions and
other converted waves, together with regional waveform inversions.
Tomographic imaging will be used to try to map the region of slab
dewatering (and intermediate depth earthquake generation), melt
generation and melt migration in the mantle wedge. Patterns of mantle
flow will be interpreted from shear wave splitting data, and crustal
structure will be inferred from receiver functions. Overall, the
idea is to infer the workings of the subduction factory by combining
seismic images of the crust and mantle with the modeled interpretations
of large observed differences in magma composition along strike
in the arc volcanoes. |
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