Host: The Japanese Society for Planetary Sciences: Local Organizing Committee for 2006 Fall Meeting
Lunar surface Heat-flow value was measured by Apollo 15 and 17 missions, which are started on July 31, 1971 and December 12, 1972, respectively. Langseth et al. (1976) concluded that the heat flow values were reduced substantially to 21 mW/m2 and 14 mW/m2 for these two Apollo sites respectively using the data until 1974. These values have been widely accepted as the appropriate measured ones at present day. However no one has analyzed Heat-Flow Experiment (HFE) data since the first of the 1975. We could archive the HFE data between March 1, 1976 and September 30, 1977. As a result of the analysis of all of the data, the lunar surface heat-flow values was corrected to be about 3.7 mW/m2. It indicates that the bulk U abundance is 9.5 ppb assuming that 3.7 mW/m2 equals the global mean value of the lunar surface heat-flow. This value is about half as much as that of the Earth (about 20 ppb; Mason, 1979).
