Structure of the lunar crust at highland site Apollo Station 16

Details Structure of the lunar crust at highland site Apollo Station 16 Structure of the lunar crust at highland site Apollo Station 16

Jan 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981georl...8...29g&link_type=abstract

Geophysical Research Letters, vol. 8, Jan. 1981, p. 29-32.

Physics

11

Apollo 16 Flight, Lunar Crust, Lunar Seismographs, Selenology, Basalt, Lunar Landing Sites, Lunar Maria, Moonquakes, Moon, Crust, Highlands, Landing Sites, Station 16, Apollo Missions, Seismology, Techniques, Thickness, Comparisons, Analysis, Procedure, Data, Mantles, Moonquakes, Layers

Scientific paper

The seismic crustal structure of the moon is known in the region of Oceanus Procellarum from the analysis of artificial impact data. To extend this knowledge we have used data from natural lunar seismic events to search for secondary seismic wave arrivals in the form of peg-leg multiples caused by reflections at crustal interfaces and converted arrivals caused by refractions at crustal interfaces. A polarization filter has been applied to the data to enhance the rectilinear particle motion expected for the onset of these body wave arrivals in the scattered coda of lunar seismograms. The results of this work tentatively indicate that the highland site at station 16 has a 75 km thick crust with an intermediate 20 km interface, compared to the 60 km crust and 20 km interface in Oceanus Procellarum, a mare region. Since the 20 km upper crust appears to exist at both highland and mare sites, it probably does not represent a mare basalt layer but rather a more general feature of the crust. Crustal thickness may partially control elevation by isostasy.

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