East Tennant Ground Gravity Survey Final Report Round 13 Geophysics and Drilling Collaborations Program

Abstract

Strategic Energy Resources Ltd (SER) was a successful applicant in Round 13 of the Geophysics and Drilling Collaboration Program for a proposed ground gravity survey over its three tenements within the East Tennant region. In 2019, data acquired under Geoscience Australia's 'Exploring for the Future' program revealed a lithospheric connection between the Tennant Creek and Mt Isa mineral fields. In particular, previously unrecognised major features favourable for hosting large mineral systems were seen in the East Tennant region1. The area is currently the focus of the National Drilling Initiative which is drilling a number of stratigraphic holes to increase the geological knowledge of the region. SER identified gravity as a key dataset for defining hematite (or magnetite) hosted Iron Oxide Copper-Gold (IOCG) mineralisation in the region and with much of the regions gravity coverage at 2km spacing, identified that detailed infill has the potential to reveal previously unknown anomalies large enough to be the expressions of significant mineralised bodies. SER completed its survey between 23 August and 7 September 2020. The survey collected 3094 new stations at 400m or 800m spacing over the three granted SER tenements within the East Tennant region. Results have greatly improved the quality of the gravity coverage over the tenements with preliminary interpretations identifying previously unknown features within the gravity highs, cross cutting features (structures) and refining the gravity expression of gravity ridges. SER will undertake further modelling of the data to guide target generation in the region with plans to drill test the high priority targets.