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Microwave dielectric properties of dry rocksA combination of techniques was used to measure the dielectric properties of 80 rock samples in the microwave region. The real part (RP) of the relative dielectric constant was measured in 0.1-GHz steps from 0.5 to 18 GHz, and the imaginary part (IP) was measured at five frequencies between 1.6 and 16 GHz. The bulk density rho(b) was also measured for all the samples, and the bulk chemical composition (BCC) was determined for 56 of the samples. RP is found to be frequency-independent at 0.5-18 GHz for all samples, and rho(b) accounts for about 50 percent of the observed variance. For silicate rocks, as much as 78 percent of the variance is explained by the combination of rho(b) and the fractional contents of oxides when the silicates are subgrouped by genesis. In contrast, IP decreases with increasing frequency for most rock samples, and no statistically significant relationships are found between IP and rho(b). For subgrouped silicate rocks, 60 percent of the variance in IP can be explained by BCC.
Document ID
19900054613
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Ulaby, Fawwaz T.
(Michigan Univ. Ann Arbor, MI, United States)
Dobson, Myron C.
(Michigan Univ. Ann Arbor, MI, United States)
East, Jack R.
(Michigan, University Ann Arbor, United States)
Bengal, Thomas H.
(Williams International, Signature Analysis Group, Walled Lake MI, United States)
Garvin, James B.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Evans, Diane L.
(JPL Pasadena, CA, United States)
Date Acquired
August 14, 2013
Publication Date
May 1, 1990
Publication Information
Publication: IEEE Transactions on Geoscience and Remote Sensing
Volume: 28
ISSN: 0196-2892
Subject Category
Geophysics
Accession Number
90A41668
Distribution Limits
Public
Copyright
Other

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