|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |
This site is maintained by the MARGINS Office. Please share your comments and suggestions with us.
|
|
|
Browse MARGINS-related
awards in reverse chronological order after start
date (most recent first):
|
|
|
 |
Experimental Studies of Trace Water in the Mantle
| MARGINS Focus Area |
Subduction Factory |
| NSF Org |
OCE |
| Latest Amendment Date |
March 16, 2001 |
| Award Number |
0095294 |
| Award Instrument |
Continuing grant |
| Program Manager |
Rodey Batiza
OCE DIVISION OF OCEAN SCIENCES
GEO DIRECTORATE FOR GEOSCIENCES |
| Start Date |
March 15, 2001 |
| Expires |
March 31, 2003 (Estimated) |
| Expected Total Amount |
$225,992 (Estimated) |
| Investigator |
Paul D. Asimow (Principal
Investigator current) |
| Sponsor |
California Inst of Tech
1201 E California Blvd
Pasadena, CA 91125 |
| NSF Program |
1620 MARINE GEOLOGY AND GEOPHYSICS |
| Field Application |
0204000 Oceanography |
| Abstract |
This is a proposal to carry out experiments in a new high-pressure
research lab at Caltech. The lab is equipped with two multi-anvil
presses. Asimow proposes to use this equipment to carry out experiments
on the solubility of water in mantle systems under conditions of
less-than-water-saturated ("damp" conditions with water 50-500 ppm
levels). These are probably realistic for the in situ mantle undergoing
melting below ridges and hot spots. This is an ambitious project
and consists of numerous elements. Among these are to determine
the solubility of H2O in mantle phases olivine, Opx, Cpx, Ga and
eclogite phases (Cpx, Ga, rutile) and how solubility changes as
a function of T, P, and system composition, including fO2. Actual
melting experiments will be carried out to 5-6 GPA in order to determine
the melt chemistry at small melt fractions and small H2O contents.
These experiments may be applicable to the mantle's low-velocity
zone at pressures of ~6 GPA (~200 km depth) The experiments will
be done by the diamond aggregate technique and include determination
of a range of mantle solidi under variable water conditions. The
proposal is for two years and comprises post-doc salary for Jed
Mosenfelder and supplies needed to carry out the experiments. The
PI is aware that two years is not enough time to carry out the full
program of work proposed- the goals are listed for illustrative
reasons only. |
|
