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Radiogenic, nucleogenic and fissiogenic noble gas compositions in early Archaean magmatic zircons from Greenland

Honda, Masahiko; Nutman, Allen; Bennett, Victoria; Yatsevich, Igor

Description

We report a full suite of radiogenic, nucleogenic and fissiogenic noble gas compositions obtained by step-heating experiments from early Archaean Greenland zircons. We estimated activation energy (Ea) of diffusion and closure temperatures (Tc) for radiogenic 4He* and fissiogenic 86Kr* and 136Xe* in zircons. These data demonstrate that the combined study of (U-Th)/He and (U-Th)/Kr-Xe can provide powerful geochronological information on cooling ages and crystallization ages from the same samples.

CollectionsANU Research Publications
Date published: 2004
Type: Journal article
URI: http://hdl.handle.net/1885/86418
Source: Geochemical Journal

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