<page_title> Hadean zircon </page_title> <section_title> Occurrence </section_title> <table> <cell> North China Craton <col_header> Occurrences </col_header> </cell> <cell> The zircon is 4.17±0.05Ga determined by LA-ICP-MS U-Pb dating method. Th/U ratio is 0.46 <col_header> Analytic method and result </col_header> </cell> </table>
In North China Craton The Hadean zircon is 4.17±0.05Ga determined by LA-ICP-MS U-Pb dating method.