Radiogenic, nucleogenic and fissiogenic noble gas compositions in early Archaean magmatic zircons from Greenland
Date
2004
Authors
Honda, Masahiko
Nutman, Allen
Bennett, Victoria
Yatsevich, Igor
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Geochemical Society of Japan
Abstract
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.
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Keywords: Archean; closure temperature; geochemistry; noble gas; radionuclide; zircon; Arctic; Greenland Closure temperature; Diffuson; Early Archaean; Noble gas; Zircon
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Geochemical Journal
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Journal article
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2037-12-31
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