Horizon Minerals has tabled a solid set of numbers from a prefeasibility study into its Penny's Find gold play, 50km northeast of Kalgoorlie, in WA, predicting a free cash flow of $24m at a gold price of $3600 per ounce. The study reveals a profitable underground mining scenario with a production target of 329,900 tonnes of ore at a grade of 3.2 grams per tonne gold for 33,500 ounces.