Fenton AEM Survey (GDC1600024) Drilling & Geophysics Collaboration Report Round 16 - Resourcing the Territory EL 32886 and EL 33615 (formerly EL 32885 & EL 33450)

Abstract

Mangusta Minerals Pty Ltd, a 100% subsidiary of DeSoto Resources Limited, holds and operates the Fenton Gold Project Exploration Licences EL 32886 and EL 33615 (formerly EL 32885 & EL 34450), approximately 150 km south of Darwin, Northern Territory. The Fenton Gold Project is an under-cover, structurally complex Palaeoproterozoic hosted gold target zone that extends for over 20km along strike by 4km across strike on the western edge of the Pine Creek inlier. It is covered by 50-200m of Cambrian limestones and mudstones of the Daly Basin. A major structure, the Fenton Shear Zone (FSZ), is interpreted from regional geophysics (gravity and magnetics) along the eastern edge of the Fenton anticlinorium. It is comparable in scale to the Pine Creek Shear Zone through the central part of the Pine Creek Orogen which hosts significant gold resources. The Fenton AEM Survey was acquired by SkyTEM Australia using there SKYTEM 312HP 12.5Hz system and a B3 helicopter. In total 853 line kilometres of electromagnetic, magnetic and elevation data was collected along nominal 200m spaced East-West orientated flight lines. The survey was effective in mapping depth to basement. The sub-Cambrian unconformity surface shows considerable topographic relief that reflect basement trends. More importantly the survey was effective for identifying bedrock geology with complex structure and significant bedrock anomalies. This has led to a re-evaluation of target areas away from existing drilling along the Fenton Shear, and the identification of new targets. The high resolution SkyTEM survey has been a significant value add to the regional scale Rum Jungle Tempest survey and it enhances the interpretation of the regional data. Re-processing of selected lines from the regional Tempest survey had demonstrated the ability of AEM to map each of these responses in an undercover environment.