The Hidden Valley Kaveroi deposit is a vein-stockwork gold-silver deposit located in the southeast corner of the Wau Graben and is hosted by the Morobe Granodiorite. The Kaindi Metamorphics occur as a cap to the Hidden Valley Kaveroi Mineralisation. It comprises grey-black and green-brown, variably carbonaceous, schistose, quartz-rich psammites and pelites that have undergone regional greenschist metamorphism and localised, higher grade contact metamorphism on intrusive contacts with Morobe Granodiorite. The granodiorite comprises two parts; an upper homogenous granodiorite of uniform texture cut by thin aplite dykes and feldspar porphyry dykes. Below the Hidden Valley Kaveroi fault is a lower, more heterogeneous unit comprising granodiorite, diorite, adamellite, tonalite and feldspar porphyry. The lower unit tends to contain gypsum veining, not regularly seen in the upper unit. The deposit is a structurally controlled vein-stockwork gold-silver deposit located in the Morobe Granodiorite of the Wau Graben. Goldsilver mineralisation is contained in carbonate-adularia- quartz-sulphide vein-stockworks and in a few instances in hydrothermal breccias. Discrete zones of intense stockwork fracture and mineralised veining comprise individual lodes. At the Hidden Valley deposit, gold and silver are related to steeply to moderately dipping sheeted vein swarms associated with an underlying shallow thrust. Numerous porphyry dykes of the Eddie Creek Suite intrude both the Kaindi Metamor ........

Hidden Valley consists of the Hidden Valley Kaveroi open pit ("HVK") and Hamata open pit. Hidden Valley is an open pit gold-silver operation, operating conventional truck/excavator open pits and an ore-processing plant. Two separate open pits are currently in operation; the HVK pit and the Hamata pit. The HVK pit is the larger pit supplying the majority of the ore and is located some 6km from the processing plant. Hamata ore is predominately exhausted and is used for Tailings dam wall construction material. Mining operations employ conventional open pit mining techniques with back-hoe excavators and rigid dump trucks as the primary load and haul equipment. Front-end loaders are used for crusher feed and stockpile reclaim. A number of articulated smaller dump trucks are used for construction, and mining in Hamata. Mining bench configuration consists of 18m inter-berm heights, mined as 2 x 9m benches or 3 x 3m flitches (typically in ore). Mining bench configuration generally consists of 18m inter-berm heights, blasted in 2m x 9m benches with 3m mining flitches. Waste is disposed in engineered valley fill waste dumps, with toes keyed in and buttressed using competent non-acid producing rock. The construction of the Neikwiye valley toe buttress and underdrain network was completed in the 2018 fiscal year and waste rock will be disposed in this dump envelope through the remainder of the mine life. Similarly under drain construction and toe buttress will be completed in the Kav ........

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