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

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...

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Bibliographic Details
Main Authors: Honda, Masahiko, Nutman, Allen, Bennett, Victoria, Yatsevich, Igor
Format: Article in Journal/Newspaper
Language:unknown
Published: Geochemical Society of Japan 2015
Subjects:
Keywords: Archean
closure temperature
geochemistry
noble gas
radionuclide
zircon
Arctic
Greenland Closure temperature
Diffuson
Early Archaean
Greenland
Online Access:http://hdl.handle.net/1885/86418
Description
Summary: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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