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Location: 36 km NE from Sidangoli, Indonesia
Gosowong Gold Mine, Halmahera IslandIndonesia
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Newcrest Mining Limited h owned 75 per cent interest in Gosowong’s mining operator, PT Nusa Halmahera Minerals until 5th March 2020. On 5 March 2020, Newcrest completed the sale of 100% of Newcrest Singapore Holdings Pte Ltd (NSH) to Indotan Halmahera Bangkit (Indotan). The remaining 25% owns PT. Aneka Tambang.
All economic mineralisation at Gosowong is of low sulphidation epithermal type occurring as mineralised fault systems resulting from high temperature gold and silver bearing hydrothermal fluids. The ore shoots are narrow and approximately planar although irregular and complex in local detail. The deposits are relatively moderate to low in dip averaging around 40-50 degrees in the Kencana – Gosowong structural corridor and sub-vertical in the Toguraci corridor. Silver to gold ratio in the ore is approximately 1:1.The Toguraci low sulphidation epithermal gold vein deposits are located 2 km south west of the Gosowong mine and form part of the Gosowong Goldfield. The vein structures at Toguraci are narrow with horizontal widths typically ranging between 0.1m and 5m.The Kencana mineralised system is a complex intersecting network of structures consisting of well-developed epithermal vein zones (K1 and K2) and link structures.
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