Terrestrial origin of SNC meteorites and 30 Myr extinctions' shower source

Details Terrestrial origin of SNC meteorites and 30 Myr extinctions' shower source Terrestrial origin of SNC meteorites and 30 Myr extinctions' shower source

2002-04-19

arxiv.org/abs/astro-ph/0204346v2

Astronomy and Astrophysics

Astrophysics

Intnl. Conf. on NEAs (San Juan Capistrano, US, 1991). No radical changes in our understanding of the nature of the SNC meteori

Scientific paper

Strong strengthening of material under high confining pressure and jet nature of outflow from impact craters permit to show meteoroid impacts of >=10E6 Mt TNT equivalent are capable of ejecting rocks up to ~1 km in size from the Earth into space. That permits one to propose the terrestrial origin of some NEA's and SNC meteorites. It is shown the isotopic anomalies of nitrogen, argon and xenon can be related with terrestrial mantle samples. The same applies to the oxygen isotope shifts if one recalls the known manifestations of the kinetic effects of isotopic fractionation.

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