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...
Main Authors: | , , , |
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Format: | Article in Journal/Newspaper |
Language: | unknown |
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Geochemical Society of Japan
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Online Access: | http://hdl.handle.net/1885/86418 https://openresearch-repository.anu.edu.au/bitstream/1885/86418/5/MigratedxPub15299_2004.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/86418/7/01_Honda_Radiogenic,_nucleogenic_and_2004.pdf.jpg |
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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