Alteration of tektite to form weathering products

Details Alteration of tektite to form weathering products Alteration of tektite to form weathering products

Jun 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992natur.357..573m&link_type=abstract

Nature (ISSN 0028-0836), vol. 357, no. 6379, June 18, 1992, p. 573-576. Research supported by DOE.

Physics

7

Bolides, Cretaceous-Tertiary Boundary, Tektites, Weathering, Etching, Radioactive Wastes, Reaction Kinetics, Systems Stability

Scientific paper

Natural and experimental alteration of tektites have been examined, and it is found that, under conditions of restricted water contact, tektite reaction is dominated by water diffusion and in situ hydrolysis of the glass structure, followed by restructuring of the silicate network to form clays. Over time, the effective rate for these processes is lower than that for etching. Thus, alteration of tektites to clays, as observed at the K/T boundary, can proceed only under conditions of limited water contact.

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