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Indonesia

Tujuh Bukit Copper Project

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Tujuh Bukit Copper Project

Location: 55 km SW from Banyuwangi, Indonesia

Project Contacts:

Perhutani, Sumberagung, Kec. Pesanggaran, Kabupaten Banyuwangi, Jawa Timur
Indonesia
68488

Contacts:

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Categories

Summary

Mine TypeUnderground
Study CompletedPrefeasibility
Study in ProgressPrefeasibility Update
StagePermitting
Commodities
  • Copper
  • Gold
  • Silver
Mining Method
  • Sub-level caving
  • Block caving
Mine Life... Lock
SnapshotTujuh Bukit Copper, located beneath Merdeka’s operating Tujuh Bukit gold mine, is regarded as one of the world’s largest pre-production copper projects.

Merdeka is progressing a range of optimisation initiatives to unlock additional value at the Tujuh Bukit copper project. An upgraded pre-feasibility study was scheduled for release in Q2 2025, incorporating a significantly larger ore reserve estimate and an increased sub-level cave throughput capacity.

Merdeka is focused on improving metal recovery and project economics at TB Copper by optimising its processing flowsheets. The Company is assessing various strategies for producing copper, pyrite, or bulk concentrates, along with downstream options to maximise value.

Merdeka made significant progress on mining and development approvals for TB Copper during Q1 2025, advancing several critical permitting milestones. All technical approvals under the PERTEK process have been secured, with only one final approval outstanding.

Owners

SourceSource
CompanyInterestOwnership
PT Merdeka Copper Gold Tbk 99.89 % Indirect
PT Merdeka Copper Gold Tbk holds a 99.89% ownership stake in the Tujuh Bukit Copper project through PT Bumi Suksesindo (BSI).

Contractors

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SourceSource

Deposit type

  • Porphyry

Summary:

TB Copper is a large-scale, copper-gold porphyry deposit.

Reserves

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Mining Methods

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Heavy Mobile Equipment

Fleet data has not been reported.

Comminution

Crushers and Mills

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Processing

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Commodity Production

Annual parameters are reported for Phase 3 of Concentrator Expansion and Block Cave mining.
CommodityUnitsAvg. AnnualLOM
Copper M lbs 2473,968
Gold koz 2674,100
All production numbers are expressed as metal in concentrate.

Operational metrics

Metrics
Annual ore mining capacity  ....  Subscribe
Annual processing capacity  ....  Subscribe
Ore tonnes mined, LOM  ....  Subscribe
* According to 2023 study.

Production Costs

CommodityUnitsAverage
All-in sustaining costs (AISC) Copper USD  ....  Subscribe
Assumed price Copper USD  ....  Subscribe
Assumed price Gold USD  ....  Subscribe
* According to 2023 study / presentation.
** Net of By-Product.

Project Costs

MetricsUnitsLOM Total
Pre-Production capital costs $M USD  ......  Subscribe
Expansion CapEx $M USD  ......  Subscribe
Gross revenue (LOM) $M USD  ......  Subscribe
EBITDA (LOM) $M USD  ......  Subscribe
Pre-tax Cash Flow (LOM) $M USD  ......  Subscribe
After-tax Cash Flow (LOM) $M USD  ......  Subscribe
After-tax NPV @ 7% $M USD  ......  Subscribe
After-tax IRR, % $M USD  ......  Subscribe

Personnel

Mine Management

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Jul 21, 2025
....................... Subscription required ....................... Subscription required Subscription required Jul 21, 2025

Workforce

Aerial view:

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