Journal cover Journal topic
Geochronology Advances in geochronological science
Journal topic
GChron | Volume 1, issue 1
Geochronology, 1, 85–97, 2019
https://doi.org/10.5194/gchron-1-85-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
Geochronology, 1, 85–97, 2019
https://doi.org/10.5194/gchron-1-85-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 11 Dec 2019

Research article | 11 Dec 2019

Stepwise chemical abrasion–isotope dilution–thermal ionization mass spectrometry with trace element analysis of microfractured Hadean zircon

C. Brenhin Keller et al.

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Short summary
The oldest known minerals on Earth are Hadean (> 4.0 Ga) zircons from the Jack Hills, Australia. We present the first application to such Hadean zircons of stepwise chemical abrasion–isotope dilution–thermal ionization mass spectrometry with trace element analysis (stepwise CA-ID-TIMS-TEA). We examine the evolution in the U–Pb age and trace element chemistry of zircon domains accessed by successive chemical abrasion steps in the context of the geologic history of the Jack Hills zircons.
The oldest known minerals on Earth are Hadean ( 4.0 Ga) zircons from the Jack Hills, Australia....
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