Mining Intelligence and News

Diamba Sud Project

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Mine TypeOpen Pit
StagePreliminary Economic Assessment
  • Gold
Mining Method
  • Truck & Shovel / Loader
Mine Life... Lock
SnapshotThe historical Mineral Resource estimates for the Diamba Sud Project were prepared in accordance with the Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves (2012 edition). The Fortuna Silver is not treating the historical estimate as a current Mineral Resource.

Subject to the successful completion of exploration program, the Fortuna Silver plans to prepare a Mineral Resource estimate in accordance with the disclosure requirements of NI 43-101. The updated evaluation planned for completion by the end of 2024.


Fortuna Mining Corp. 100 % Indirect
The Diamba Sud Project is owned by Boya SA, which is an indirect wholly-owned subsidiary of Fortuna that was acquired in September 2023 pursuant to the Chesser Acquisition.



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Deposit type

  • Orogenic


The ore deposit type is defined as orogenic lode gold with supergene enriched saprolitic zones. The geology at Diamba Sud is composed of sedimentary packages that are intruded by mafic to felsic intrusions of varying proportions and trajectories. Mineralisation is structurally controlled by faults and shears and mineralisation can occur within all lithologies that mineralised structures crosscut. Mineralisation can be disseminated or veined and is dominantly associated with pervasive alteration. Supergene enrichment of orogenic mineralisation within the saprolite zone is responsible for increasing grades of mineralisation dominantly within Area D.

Area D mineralisation has been separated into 3 domains, High Grade Oxide, Sapzone and Fresh. The mineralisation in the fresh is interpreted to be striking approximately N-S and dipping to the west between 30-45°. Oxide mineralisation forms a horizontal blanket overlying the fresh mineralisation. The Area D mineralised trend is greater than 250m long and greater than 300m wide in sections.

This style of mineralisation can occur as veins or disseminations in altered (often silicified) host rock or as pervasive alteration over a broad zone.

Deposits are often found in close proximity to linear geological structures (faults & shears) often associated with deep-seated structures.

Lateritic weathering is common within the project area and is deepest over Area D. The depth to fresh rock in Area D a depths ranging between 20–50 m from surface.

The primary Mineral Resource extent in Area D is approximately 250 m in the north/south direction and ~250 m in the east west direction. The oxide resource at Area D contains the main zone of mineralisation hosting >60% of the total mineralisation.

Depth of the oxide Resource domain is variable throughout the deposit, however it is largely between 20 m to 50 m.

The fresh mineralised domain starts from 20–50 m depth and thus far has only been drilled to a maximum depth of ~180 m.



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Mining Methods


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Crushers and Mills


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CommodityUnitsAvg. AnnualLOM
Gold oz 100715
All production numbers are expressed as metal in doré.

Operational metrics

Daily processing capacity  ....  Subscribe
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Ore tonnes mined, LOM  ....  Subscribe
Total tonnes mined, LOM  ....  Subscribe
Tonnes processed, LOM  ....  Subscribe
* According to 2022 study.

Production Costs

All-in sustaining costs (AISC) Gold USD  ....  Subscribe
Assumed price Gold USD  ....  Subscribe
* According to 2022 study / presentation.

Operating Costs

OP mining costs ($/t mined) USD 3.7 *  
OP mining costs ($/t milled) USD  ....  Subscribe
Processing costs ($/t milled) USD  ....  Subscribe
G&A ($/t milled) USD  ....  Subscribe
Total operating costs ($/t milled) USD  ....  Subscribe
* According to 2022 study.

Project Costs

MetricsUnitsLOM Total
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After-tax Cash Flow (LOM) $M USD  ......  Subscribe
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Required Heavy Mobile Equipment


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Mine Management

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Jun 13, 2024
....................... Subscription required ....................... Subscription required Subscription required Jun 13, 2024

Total WorkforceYear
...... Subscription required 2022

Aerial view:


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