The Henty deposit lies within the Mt Read Volcanic (MRV) Belt in western Tasmania. The belt hosts several world-class polymetallic ore bodies including the Hellyer, Que River, Rosebery, Hercules and Mount Lyell deposits. The whole belt has been overprinted with a regional lower green schist facies metamorphism. Mineralisation consists of a series of small high-grade lenses of gold mineralisation hosted in quartz-sericite altered volcaniclastic and volcanic rocks that occupy a large sub-vertical quartz-sericite alteration shear zone. Gold is present as both free gold and as gold-rich electrum associated with chalcopyrite and galena in the main mineralised zone. The main part of the resource extends for a strike length of approximately 3,300 m. Plan width varies from 2 m to 5 m for some lodes up to 10–20 m wide for the main mineralised structures. The reported Mineral Resource plunges to the south and occurs between 50 m and 850 m of surface. The reported Mineral Resource is comprised of 11 separate model areas covering the dimensions of the deposit as follows: 16 Sill Zone, 17 Intermediate Zone, 18 Zone 15, 19 Zone 96, 20 Newton Zone 21, Mt Julia 22, Read Zone, 23 Darwin North, 24 Darwin Central, 25 Darwin South, 26 Tear Away Zone. Mineralisation consists of a series of small high-grade lenses of gold mineralisation hosted in quartz-sericite altered volcaniclastic and volcanic rocks that occupy a large sub-vertical quartz-sericite alteration shear zone. Gold is present as b ........

The Henty Mine uses bench mining and flatback mining as the principle means of ore extraction. In selected places where development allows, a modified Avoca method has been used with success. Mining method selection is based on: • Width and grade of the ore • Regularity along strike and up dip • Proximity to the Henty Fault zone • General ground conditions Each orebody has unique characteristics. Where conditions permit, benching provides the most costeffective method of extraction. Where the ore value is high, but ground conditions are critical to minimising dilution flatback mining is preferred. In bench stoping, heights are limited to 12-15m. Where it is economic to do so, development is completed top and bottom. The choice of uphole or downhole drilling is based on geometry of the ore. Extraction is bottom up. As a generality, the mining areas in the lower section of the mine have wider widths, more modest grades and are away from the Henty Fault. Conversely the upper areas of the mine tend to be higher grade, narrow and occasionally interact with the Henty Fault. Production drilling is carried out using a long hole drill rig equipped with a Minnovare Production Optimiser system for drillhole accuracy. Blasting is carried out using ANFO and electronic detonators. Majority of the stopes will be filled using unconsolidated rock fill trucked from surface or underground development waste. This will improve stope stability and increase ore recovery while minimising th ........

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