Physics
Scientific paper
Jan 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978rock.reptq....t&link_type=abstract
Annual Report, 1 Jan. - 31 Dec. 1977 Rockwell International Corp., Thousand Oaks, CA. Science Center.
Physics
Adsorption, Hydrostatic Pressure, Lunar Rocks, Q Factors, Seismic Waves, Internal Friction, Modulus Of Elasticity, Outgassing, Vacuum
Scientific paper
In order to better interpret recently reported values for the variation of seismic Q as a function of depth below the lunar surface, we have developed apparatus and made laboratory measurements of Q as a function of hydrostatic pressure, temperature and frequency. Our measurements of the Q associated with shear deformations have demonstrated that the large difference in Q between well outgassed and volatile rich rocks persists to pressures corresponding to a depth of at least 50 km. Here we report new measurements of Q as a function of temperature, on the development of techniques to measure the Q associated with extensional deformations under hydrostatic pressure, on the derivation of theoretical relations between our laboratory Q values and the attenuation coefficient of seismic waves, and on the development of a model for mechanism of adsorption.
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