Shallow moonquakes - Argon release mechanism

Details Shallow moonquakes - Argon release mechanism Shallow moonquakes - Argon release mechanism

Nov 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980georl...7.1011b&link_type=abstract

Geophysical Research Letters, vol. 7, Nov. 1980, p. 1011-1013. Research supported by the Deutsche Forschungsgemeinschaft.

Physics

5

Argon, Crustal Fractures, Moonquakes, Lunar Crust, Lunar Rocks, Moon, Moonquakes, Argon, Models, Observations, Thrust Faults, Rocks, Crust, Abundance, Brecciation, Melting, Energy, Mass Spectroscopy, Spectrographs, Apollo 17

Scientific paper

Apollo 17 surface mass-spectrometer observations have shown that 10 to the 27th to 10 to the 28th molecules of Ar-40 are released from the moon when shallow moonquakes occur. Model calculations, based on the seismic and strain energies released by the moonquakes, the volumes of their focal zones, and the surface areas of observed shallow thrust faults, indicate that 1.5 x 10 to the 25th to 2 x 10 to the 28th molecules of Ar-40 could be released by each shallow moonquake as a result of mylomization and possible frictional melting of the rocks within a few decimeters of the newly formed parts of the fault surface. The rapid escape of this Ar-40 along the fractures of the fault would produce the observed argon release event shortly after each moonquake.

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