New SHRIMP U-Pb zircon ages from the undercover Mount Isa Province and margins, 2020-2024

This Record presents new Sensitive High Resolution Ion Microprobe (SHRIMP) U–Pb geochronological results for ten borehole samples collected from undercover extensions of the Mount Isa Province and adjoining undercover provinces. Detailed results encompassing location and geological context, description of the target mineral for geochronology, the analytical data, and a brief interpretation of the results are presented for each sample. A summary of the results is presented in Table i, and the sample locations are shown in Figure i. The work contained in this Record was carried out under the auspices of the National Collaboration Framework (NCF) agreement between Geoscience Australia and the Geological Survey of Queensland. The data and interpretations are also available in GIS-type formats from the Geochronology and Isotopes layer of the GA Portal (https://portal.ga.gov.au/persona/geochronology). A comprehensive description of sample acquisition and processing procedures, preparation and analysis of SHRIMP mounts, and data reduction and presentation methods are included in the Appendix, along with analytical session-specific details of the calibration data collected on the reference 206Pb/238U and 207Pb/206Pb zircons.