On the origin of gas-rich meteorites

Details On the origin of gas-rich meteorites On the origin of gas-rich meteorites

May 1964

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1964gecoa..28..595s&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 28, Issue 5, pp.595-600

Mathematics

Logic

18

Scientific paper

Meteorites that contain large amounts of primordial rare gases, i.e. the so-called gas-rich meteorites, always show a light-dark structure. They consist of light parts imbedded in a matrix of much darker material. Only the dark material contains the rare gases. Mineralogical and chemical evidence shows that gas content and light-dark structure of this class of meteorites cannot have originated simultaneously with the formation of sulfides, nor can it have been produced by violent shocks. Although the chemical composition of the minerals in the light and in the dark parts is practically identical, the structure of these meteorites is not that of a pseudobreccia produced in situ , but that of a true polymict breccia formed by agglomeration of various types of fragments. Content and distribution of primordial rare gases and their isotopes in these meteorites, in particular according to the results obtained at Mainz, can best be explained by assuming incorporation of the gases by particle radiation such as solar wind. A possible relationship to comets is mentioned.

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