Electrical conductivity of lunar surface rocks - Laboratory measurements and implications for lunar interior temperaturesResults are reported for laboratory measurements of the dc and low-frequency ac electrical conductivity of three lunar rocks with ferrous iron contents of 5 to 26 wt %. The measurements were made at temperatures ranging from 20 to 1000 C, and Mossbauer spectroscopy was used to determine the dependence of electrical conductivity on furnace atmosphere. It is found that the magnitude of electrical conductivity generally increases with increasing iron content. A comparison of the data on these samples with data on terrestrial olivines and pyroxenes shows that the electrical conductivity of anhydrous silicate minerals is influenced primarily by the concentration, oxidation state, and distribution of iron, while the silicate crystal structure is only of secondary importance. Lunar interior temperatures are deduced from experimental lunar conductivity profiles, and the resulting temperature-depth profiles are found to be consistent with those calculated for two different lunar evolutionary models as well as with various experimental constraints.
Document ID
19750055639
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Schwerer, F. C.
Huffman, G. P.
Fisher, R. M. (United States Steel Corp. Monroeville, Pa., United States)
Nagata, T. (National Institute of Polar Research Tokyo, Japan)