9220603 Cooper Flexural creep and attenuation experiments on glass-ceramics and synthetic (Co-Mg) olivine-basalt partial-melt aggregates indicate three-to-four distinct anelastic loss (attenuation) mechanisms. These losses interact to produce an attenuation "band" in space. The nature of these losses, if understood, could form an unequivocal foundation for recognizing the attenuation effects(s) uniquely associated with partial melting. Therefore, an experimental investigation of the effects of quasiequilibrated partial melting on the attenuation behavior of polycrystalline silicates will be done. Seismic-to-subseismic frequency experiments will be performed in both shear (reciprocating torsion) and Young's modulus (reciprocating flexure) formats in order to isolate the effects of a steady-state melt morphology on S- and P- wave attenuation. The experiments will be applied to synthetic aggregates of olivine, olivine-plus-(olivine-saturated) tholeiite basalt and aluminosilicate glass-ceramics. ***

Agency
National Science Foundation (NSF)
Institute
Division of Earth Sciences (EAR)
Application #
9220603
Program Officer
Robin Reichlin
Project Start
Project End
Budget Start
1993-09-01
Budget End
1997-08-31
Support Year
Fiscal Year
1992
Total Cost
$240,000
Indirect Cost
Name
University of Wisconsin Madison
Department
Type
DUNS #
City
Madison
State
WI
Country
United States
Zip Code
53715