Summit Minerals Limited announce some preliminary observations from its maiden field investigations at the Munga Creek Group in the Windfall Antimony Project, near Kempsey, NSW. Summit completed early-stage exploration activities, including surface prospecting, soil and rock chip sampling, and assays across the historical workings to best define targets for an upcoming drilling campaign. The Munga Creek Group was last operational in 1974, producing over 1100t of antimony metal.

Based on new geological understanding, the Company has re-entered the field to test the identified locally mineralised veins and their extensions beneath recent cover using UltraFine+TM soils. Additionally, the company is considering various geophysical approaches to promote targeting and help overcome the heavy scrub, which makes exploration and visualisation of outcrops difficult. Also, the company has expanded its focus to the Pinnacles and Tooroka Groups and anticipates completing similar exploration soon.

Summit considers the Windfall licence area highly prospective for structurally controlled antimony mineralisation. Antimony occurrences in the Munga Creek area are mostly aligned along northerly trends. However, northeast of Munga Creek, some occurrences exhibited an east-west orientation.

All are vein-type occurrences of quartz and stibnite, with breccia features commonly observed. Pyrite and pyrrhotite can accompany the stibnite mineralisation. The vein distribution is invariably controlled by significant fault zones and fracture systems that have accommodated hydrothermal solutions.

The source for the mineralisation remains unidentified, and the host rock is mainly silicified siltstone. Except for the Munga Creek Mine, the known veins remain relatively underexplored, with several new veins identified east of the historical workings offering further potential to the project.