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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-related
awards in reverse chronological order after start
date (most recent first):
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Origin, Deformation and Composition of Mesozoic Oceanic Crust Entering
the Tonga-Kermadec Trench
| MARGINS Focus Area |
Subduction Factory |
| NSF Org |
OCE |
| Latest Amendment Date |
April 12, 2000 |
| Award Number |
9731045 |
| Award Instrument |
Continuing grant |
| Program Manager |
David E. Epp
OCE DIVISION OF OCEAN SCIENCES
GEO DIRECTORATE FOR GEOSCIENCES |
| Start Date |
January 15, 1999 |
| Expires |
December 31, 2000 (Estimated) |
| Expected Total Amount |
$324,512 (Estimated) |
| Investigator |
Peter F. Lonsdale (Principal
Investigator current)
Paterno R. Castillo (Co-Principal Investigator current) |
| Sponsor |
U of Cal SD Scripps Inst
9500 Gilman Drive
La Jolla, CA 92093 |
| NSF Program |
1620 MARINE GEOLOGY AND GEOPHYSICS |
| Field Application |
0204000 Oceanography |
| Abstract |
The proposed work will test the ideas about how oceanic lithosphere
deforms as it enters the subduction zone and how its composition
affects the magmatism of the adjacent volcanic arc. The investigators
will undertake a magnetic and multibeam bathymetric survey and dredge
rock samples from the outer bulge of Tonga-Kermadec Trench for geomorphological
and geochemical analyses, respectively. This will allow them to
sample young exposures of old oceanic crust rpoduced by faulting
and study the sample young exposures of old oceanic crust produced
by faulting and study the Mesozoic deformation. A 2000-km long and
80 km wide strip will be mapped by Seabeam 2000 and ca 20-30 dredge
samples will be collected. |
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