Proton probe analysis of an irghizite and a high-magnesium Java tektite

Details Proton probe analysis of an irghizite and a high-magnesium Java tektite Proton probe analysis of an irghizite and a high-magnesium Java tektite

Feb 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981gecoa..45..229v&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 45, Feb. 1981, p. 229-234.

Mathematics

Logic

1

Microinstrumentation, Nondestructive Tests, Particle Accelerators, Tektites, Chemical Analysis, Meteorite Craters, Proton Beams, X Rays, Zhamanshin Crater, Ussr, Australasian Strewnfield?, Meteorites, Data, Magnesium, Microprobe Analysis, Tektites, X-Rays, Spectrum, Protons, Samples, Composition, Techniques, Procedure, Comparisons, Equipment, Irghizites, Australites, Major Elements, Trace Elements, Nickel, Contamination, Abundance, Silicon Dioxide

Scientific paper

A collimated proton microprobe facility with an external beam is being developed, using the 2-MeV Van de Graaff accelerator at the University of Delaware. X-ray spectra from proton bombardment of geological samples in an air or helium atmosphere are analyzed to yield elemental compositions. The chief advantages of this method are its nondestructive nature, multi-element simultaneous analysis, and superior sensitivity for trace elements compared with the electron microprobe. In order to test this method, two specimens have been analyzed: (1) a SiO2-rich irghizite from the Zhamanshin structure, and (2) fragments of high-Mg tektite from Sangiran, Java. Analyses for about twenty elements for both specimens are in satisfactory agreement with previous determinations using other techniques. The proton probe data supports previous data concerning the similarity in composition between the SiO2-rich irghizites and the high-Mg Australasian tektites.

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