Nitrogen and trace elements in tektites and impact glasses

Details Nitrogen and trace elements in tektites and impact glasses Nitrogen and trace elements in tektites and impact glasses

Jul 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989e%26psl..93..325m&link_type=abstract

Earth and Planetary Science Letters (ISSN 0012-821X), vol. 93, no. 3-4, July 1989, p. 325-335. Research supported by ISRO.

Mathematics

Logic

1

Glass, Meteoritic Composition, Nitrogen, Tektites, Trace Elements, Impact, Irradiation, Earth, Tektites, Nitrogen, Trace Elements, Glasses, Impacts, Procedure, Muong Nong Tektites, Irghizites, Zhamanshinites, Samples, Terrestrial, Chemistry, Origin, Formation, Melting, Laboratory Studies, Diagrams, Neutron Activation Analysis, Inaa, Rnaa, Comparisons

Scientific paper

Nitrogen and several trace elements have been studied in samples one Muong Nong tektite, irghizites (tektite-like glass)/zhamanshinites (impactites) and several obsidian glasses. A detailed investigation of inter- and intralayer samples from the Muong Nong tektite shows a chemical heterogeneity both within and between the layers. In general, the elemental variations seems to be due to a varying FeO content. Irghizites, both SiO2-rich and SiO2-poor, are compositionally more homogeneous than the zhamanshinites. The heterogeneous distribution of nitrogen, observed in the Muong Nong tektite and the zhamanshinites, is unlike that in any other tektite studied so far. This shows clearly that zhamanshinites have suffered lower peak temperatures than irghizites and Muong Nong tektites lower ones than normal 'splash-form' tektites. Available chemical and petrological data on Muong Nong tektites suggest that they were formed by in situ melting of soil.

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