A Comparison of the Noble Gases in Three Meteorite Specimens Labeled Springfield
The abundance and isotopic composition of the noble gases were measured in three Springfield specimens identified by the Denver Museum of Natural History with numbers 7029, 379.13 and 6040. The latter specimen contains more cosmogenic noble gas isotopes than the other two specimens and the abundance pattern of trapped noble gases in specimen 6040 is distinct from that in the other two specimens. Specimen 7029 contains about seven times as much radiogenic 40Ar and about four times as much radiogenic 129Xe as does specimen 379.13. These results indicate that the three specimens did not come from a single meteoroid.
E. W. Hennecke and O. Manuel, "A Comparison of the Noble Gases in Three Meteorite Specimens Labeled Springfield," Zeitschrift fur Naturforschung - Section A Journal of Physical Sciences, vol. 31, no. 3-4, pp. 293-296, Zeitschrift fur Naturforschung - Section A Journal of Physical Sciences, Apr 1976.
The definitive version is available at http://dx.doi.org/10.1515/zna-1976-3-413
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© 1976 Verlag der Zeitschrift fur Naturforschung, All rights reserved.