The geology in the Mara Rosa District is principally delineated by three northeast striking, moderately to steeply northwest dipping belts of metamorphosed volcano-sedimentary and associated intrusive rocks. These belts, referred to as the Western, Central, and Eastern Belts, are separated by broad zones of tonalitic orthogneiss.

The Eastern Belt is bounded to the southeast by the Rio dos Bois fault, which also defines the southeastern limit of the GMA.

Amarillo’s land position within the Mara Rosa District primarily covers the Eastern Belt greenstone assemblage with some coverage of the Western and Central belts as well. The Eastern Belt, has a maximum thickness of 6 km, generally strikes to the northeast and dips moderately to steeply to the northwest. Surface topography is characterised by moderate relief and locally dissected drainages that follow lithologic or structural weaknesses. Depth to fresh bedrock is generally shallow, ranging from 0 to 15 m. The upper portion of the weathered profile consists of clay-rich latosol and saprolite derived from the underlying bedrock.

Rocks of the Eastern Belt are locally intruded by quartz-feldspar-muscovite and biotite granitic rocks and associated aplite and pegmatite dykes, small stocks and dykes of hornblende, biotite and magnetite diorite, and, in its north-central portion, a large body of hornblende-plagioclase gabbro. All units exhibit varying degrees of foliation that typically range from we ........

The Posse Gold Project is based on a mining concept that uses conventional drill, blast, load and haul techniques for all mining areas and rock types. One hundred per cent of the fresh rock and 30% of the saprolite will be blasted and loaded with excavators into 8x4 on-road trucks, and hauled to final destinations, i.e., primary crusher, low grade stockpiles or waste dumps. Direct mining will be applied to soft material such as soil and fill materials.

Specifically, primary mining will be undertaken by 74-t hydraulic excavators coupled with 45-t heavy tipper trucks.

A 15-month pre-stripping phase, between April 2021 and June 2022, was planned to ensure an initial supply of ore. During this stage the pit will require dewatering of the existing pit lakes. Water will be removed using a pumping system and directed to the planned water reservoir.

The ore and ore/waste contact materials will be mined in 5-m high benches for selectivity purposes, while double benches of 10-m high will be adopted for waste where there is no risk of dilution or ore loss.

The mining method will generate variable quantities of low grade that will require the use of stockpiles. Front-end loaders (FELs) will provide RoM feed and stockpile re-handling.

The mined waste will be distributed into six waste dumps.

The mined materials will be transported along roads cut through the mining area to give a suitable gradient. Double-lane haul roads ........

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