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Indonesia
Tujuh Bukit Gold Mine

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 Location:
55 km SW from Banyuwangi, Indonesia
  Regional Office:
The Convergence Indonesia 20th Floor, Jl. HR. Rasuna Said, Karet Kuningan Setiabudi
Jakarta
Indonesia
12940
Phone  ...  Subscription required
Fax+62-21-29880392
EmailEmail
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Costs & Financials
  • Personnel
  • Filings & News
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Overview

StageProduction
Mine TypeOpen Pit
Commodities
  • Gold
  • Silver
Mining Method
  • Truck & Shovel / Loader
Processing
  • Heap leach
  • Carbon in column (CIC)
  • AARL elution
  • Carbon adsorption-desorption-recovery (ADR)
  • Solvent Extraction & Electrowinning
  • Cyanide (reagent)
Mine Life5.25 years (as of Jan 1, 2019)
Latest NewsRed Pine Makes New Discovery - Hits 5.2 g/t Gold over 6.31 m Including 15.7 g/t over 1.07 m and 12.4 g/t over 0.78 m Beneath the Surluga NI 43-101 Resource     May 12, 2020

Owners & OPERATOR

Source: p. 15
CompanyInterestOwnership
PT Merdeka Copper Gold Tbk 100 % Indirect
PT Bumi Suksesindo (operator) 100 % Direct
PT Merdeka Copper Gold Tbk (“Merdeka”), a holding company with operating subsidiaries engaging in mining business activities. The subsidiaries are (i) PT Bumi Suksesindo (“BSI”) as the holder of the operation production mining business license for the Tujuh Bukit mine, (ii) PT Damai Suksesindo (“DSI”) which holds the adjacent exploration permit, (iii) PT Batutua Tembaga Raya (“BTR”) as the holder of operation production mining business license specifically for processing and refining.
Deposit Type

  • Epithermal

Summary:

Mineralisation Type - High Sulphidation Epithermal.

Mining Methods

  • Truck & Shovel / Loader

Summary:

Mining Method - Conventional Open Pit.

Crushing and Grinding

Processing

  • Heap leach
  • Carbon in column (CIC)
  • AARL elution
  • Carbon adsorption-desorption-recovery (ADR)
  • Solvent Extraction & Electrowinning
  • Cyanide (reagent)

Source: Subscription required

Summary:

The Tujuh Bukit Gold employs open pit mining, followed by ore crushing and agglomerating, stacking of agglomerated ore on the leach pad, leaching of the ore and recovery of gold and silver via an industry standard ADR Gold Processing Plant (Adsorption, Desorption and Recovery).

Agglomerated ores are trucked and stacked to the leach pad, and irrigated with diluted cyanide solution for 150 days.

At the ADR processing plant, gold and silver are recovered using industry standard methods of metal adsorption onto carbon, desorption off carbon and recovery through an electrowinning and refining circuit. Gold and silver are smelted to produce rough or doré bars that are transported offsite for final refining.

The Tujuh Bukit Gold has expanded its ore processing capacity from the original 4 million tonnes per annum to 8 million tonnes per annum – completed in Q2-2019. The heap leach pad, the total area of which had been expanded to increase its capacity to 56 Mt ........

Recoveries & Grades:

CommodityParameter201920182017
Gold Recovery Rate, %  ......  Subscription required
Gold Head Grade, g/t  ......  Subscription required  ......  Subscription required2.16
Silver Recovery Rate, %  ......  Subscription required  ......  Subscription required

Production:

CommodityUnits201920182017
Gold oz  ......  Subscription required167,506141,468
Silver oz  ......  Subscription required  ......  Subscription required
All production numbers are expressed as metal in doré.
Subscription required - Subscription is required.

Operational Metrics:

Metrics201920182017
Ore tonnes mined  ......  Subscription required  ......  Subscription required3.3 Mt
Waste  ......  Subscription required  ......  Subscription required4.1 Mt
Tonnes processed  ......  Subscription required  ......  Subscription required
Daily processing capacity  ......  Subscription required  ......  Subscription required
Annual processing capacity  ......  Subscription required  ......  Subscription required4 Mt
Subscription required - Subscription is required.

Reserves at :

Commodity Production Costs:

CommodityUnits201920182017
Cash costs Gold USD  ......  Subscription required† 374 / oz† 297 / oz†
All-in sustaining costs (AISC) Gold USD  ......  Subscription required† 596 / oz† 425 / oz†
† Net of By-Product.
Subscription required - Subscription is required.

Financials:

Units201920182017
EBITDA M USD  ......  Subscription required155  100  
Subscription required - Subscription is required

Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Sep 25, 2020
....................... Subscription required ....................... Subscription required Subscription required Sep 25, 2020
....................... Subscription required ....................... Subscription required Subscription required Sep 25, 2020
....................... Subscription required ....................... Subscription required Subscription required Sep 25, 2020
....................... Subscription required ....................... Subscription required Subscription required Feb 9, 2021
....................... Subscription required ....................... Subscription required Subscription required Sep 25, 2020
....................... Subscription required ....................... Subscription required Subscription required Sep 25, 2020
Subscription required - Subscription is required.

Staff:

Total WorkforceYear
Subscription required 2020
Subscription required 2019

Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
Quarterly Report 2018
Subscription required - Subscription is required.

News:

NewsDate
Red Pine Makes New Discovery - Hits 5.2 g/t Gold over 6.31 m Including 15.7 g/t over 1.07 m and 12.4 g/t over 0.78 m Beneath the Surluga NI 43-101 Resource May 12, 2020
Red Pine Intersects 5.7 g/t Gold over 0.6 Metres and 5.2 g/t over 0.9 Metres 100 Metres below the Current Surluga Resource April 2, 2020
Red Pine Intersects Unexpected Gold Zones at the Wawa Gold Project - Highlights Include 2 g/t over 11.28m including 6.13 g/t over 3.15m November 21, 2019
Red Pine Extends the Footprint of the Grace Discovery at its Wawa Gold Project September 25, 2019
Red Pine Exploration Files NI 43-101 Technical Report for its Wawa Gold Project July 16, 2019
Red Pine Continues to Expand Footprint of Gold Mineralization at its Wawa Gold Project April 23, 2019
Red Pine Drills 11.95 g/t Gold Over 4.44 Metres (True Width) at its Wawa Gold Project January 17, 2019
Red Pine Drills 32.16 g/t Gold over 2.91 Metres (True Width) at its Wawa Gold Project January 3, 2019

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