Indonesia

Gosowong Operation

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Categories

Overview

Mine TypeUnderground
StatusActive
Commodities
  • Gold
  • Silver
Mining Method
  • Longhole stoping
  • Overhand Cut & Fill
Production Start... Lock
Mine Life... Lock
SnapshotThe Gosowong operation comprises Kencana mine and Toguraci mine.

No production data is publicly available since Newcrest completed the sale of 100% of Newcrest Singapore Holdings Pte Ltd (NSH) to Indotan Halmahera Bangkit (Indotan) on 5 March 2020.
Related Asset

Owners

SourceSource
CompanyInterestOwnership
PT Antam (Persero) Tbk 25 % Indirect
PT Indotan Halmahera Bangkit (Indotan) 75 % Indirect
PT. Nusa Halmahera Minerals (operator) 100 % Direct
Pt Nusa Halamhera Minerals (NHM) is the joint venture Indonesian company formed to manage the Gosowong Gold Mine.

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.

Deposit type

  • Epithermal

Summary:

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.

Reserves

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Mining Methods

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Comminution

Crushers and Mills

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Processing

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Production

2020 production from Gosowong is shown up to the divestment date of 4 March 2020.
CommodityUnits2021202020192018201720162015
Gold koz  ....  Subscribe  ....  Subscribe190251296197332
All production numbers are expressed as metal in doré.

Operational metrics

Metrics202220192018201720162015
Daily mining rate  ....  Subscribe
Plant annual capacity  ....  Subscribe800 kt800 kt800 kt
Ore tonnes mined  ....  Subscribe690 kt679 kt564 kt416 kt716 kt
Total tonnes mined  ....  Subscribe808 kt767 kt664 kt484 kt878 kt
Tonnes milled  ....  Subscribe708 kt704 kt565 kt479 kt738 kt

Production Costs

CommodityUnits201920182017
All-in sustaining costs (sold) Gold USD 1,099 / oz **   882 / oz **   757 / oz **  
** Net of By-Product.

Financials

Units2020201920182017
Capital expenditures (planned) M USD  ....  Subscribe
Sustaining costs M USD 22   25   33  
Revenue M USD 256   351   350  
EBIT M USD -4   58   79  
EBITDA M USD 63   148   177  
Operating Cash Flow M USD 56   146   186  

Heavy Mobile Equipment

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Personnel

Mine Management

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Dec 14, 2023
....................... Subscription required ....................... Subscription required Subscription required Dec 14, 2023
....................... Subscription required ....................... Subscription required Subscription required Dec 14, 2023
....................... Subscription required ....................... Subscription required Subscription required Dec 14, 2023

EmployeesContractorsYear
...... Subscription required ...... Subscription required 2019
...... Subscription required ...... Subscription required 2018
...... Subscription required ...... Subscription required 2017
...... Subscription required ...... Subscription required 2016

Aerial view:

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