Geochemical comparison of Australian and North American tektites

Details Geochemical comparison of Australian and North American tektites Geochemical comparison of Australian and North American tektites

Feb 1965

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1965gecoa..29...65t&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 29, Issue 2, pp.65-70

Computer Science

Scientific paper

Australian tektites (australites) and North American tektites (bediasites) are broadly similar in composition, but differ widely in detail. There is no overlap in the ranges of concentration of CaO, MgO, Li, Ni and Mn and only minor overlap for Sr, Cr and Co. The average concentration of Li, Sr, Ni, Cr and Mn in australites is greater than that in bediasites by a factor of two or greater. Lesser differences in composition are shown by SiO 2 , Al 2 O 3 , K 2 O, Na 2 O, Co and Rb. The differences are not due to analytical error and cannot be explained as the result of selective volatilization acting on similar source material. The changes are not in the direction predicted for terrestrial igneous rocks. It is concluded that there are real variations in parent materials, and hence source areas for australites and bediasites. The restriction on chemical identity of different tektite groups is removed.

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