Computer Science
Scientific paper
Feb 1956
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1956gecoa...9...98h&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 9, Issue 1-2, pp.98-102
Computer Science
1
Scientific paper
A direct comparison of helium and radiogenic lead in nonmetamict zircon crystals has indicated a 25 per cent discrepancy between these radiogenic constituents. It appears that the amount of helium is only three-quarters of the amount that should be present according to the content of radiogenic lead. Approximately the same proportion was found in zircon having a wide range in age, activity, and total alpha irradiation, and in large pegmatite zircon crystals, as well as in microscopic crystals from igneous rocks.
Gottfried David
Hurley Patrick M.
Larsen Esper S. Jr.
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