Summary of results. Joint NTGS-GA geochronology project: western Amadeus Basin, July-August 2020

Abstract

This Record presents data collected in July-August 2020 as part of the ongoing Northern Territory Geological Survey-Geoscience Australia SHRIMP geochronology project under the National Collaboration Framework agreement and Geoscience Australia's Exploring for the Future program. New SHRIMP U-Pb zircon geochronological results derived from eight sedimentary samples collected from the western Amadeus Basin in the Northern Territory are presented herein. Detrital zircon U-Pb ages were determined from four samples of the Winnall Group, comprising three samples of the Liddle Formation and one of the Puna Kura Kura Formation. Zircon U-Pb ages were also determined from two samples of the Pertaoorrta Group (Cleland Sandstone and Tempe Formation), one sample of the Larapinta Group (Stairway Sandstone), and one sample of the Mereenie Sandstone.

The samples were selected to investigate lateral variations in detrital zircon age spectra in the western Amadeus Basin, to assist in the refinement of Neoproterozoic stratigraphic correlations across the basin, and to provide additional results to augment the extensive detrital zircon provenance dataset for ongoing basin provenance studies.