Greece

Stratoni Mine

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Categories

Overview

Mine TypeUnderground
Commodities
  • Silver
  • Lead
  • Zinc
Mining Method
  • Drift & Fill
  • Transverse stoping
  • Longitudinal stoping
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ShapshotThe Stratoni is an underground, silver-lead-zinc mine. The Stratoni mine consists of two deposits: Mavres Petres and Madem Lakkos, which were mined out previously. On October 15, 2021, Eldorado Gold announced that operations at Stratoni would be suspended at the end of 2021. The mine and plant were transferred to care and maintenance during 2022.

As of December 13, 2021 Mavres Petres mine was placed under care and maintenance with the workforce being re-distributed to other operations of Hellas Gold.

Eldorado Gold will evaluate resuming operations subject to exploration success and positive results of further technical and economic review.

Owners

SourceSource
CompanyInterestOwnership
Eldorado Gold Corp. 100 % Indirect
Hellas Gold, wholly owned subsidiary of Eldorado Gold Corp., is the 100% owner of the Stratoni.

Contractors

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Deposit type

  • Carbonate replacement
  • Skarn

Summary:

The Stratoni polymetallic ore consists of stratabound replacement mineralisation hosted within marble horizons and may be termed a distal skarn. The mineralisation was emplaced by hydrothermal fluids driven by a granodioritic intrusive which was intruded some 30 million years ago. The mineralised zone is often referred to as the Stratoni-Piavitsa belt, and the total sulphide content of this belt prior to mining has been estimated at 25Mt. The deposits consist of massive sulphide carbonate and aplite replacement, restricted to two Marble horizons, interlayed with biotite gneiss and schist. The model therefore requires two components; marble horizons that have been thickened and structurally prepared by thrusting and folding prior to the introduction of mineralising fluids and; a structural architecture which has allowed the channelling of fluids from a magmatic source to the chemically reactive marbles. Exploration uses these two elements as a guide to identifying potential new ore zones.

The massive sulphide mineralisation has a relatively simple mineralogy, and the most abundant ore minerals are pyrite, sphalerite, galena, arsenopyrite and chalcopyrite. The dominant exploited minerals historically have been sphalerite, pyrite and galena; the ore is often abbreviated to BPG from the old notation blende, pitch, galena. The ore is also gold bearing, mostly associated with the arsenical pyrite and arsenopyrite. Quartz, calcite and minor rhodochrosite form the gangue minerals.

The mineralisation is hosted either in the marble or replacing aplite as irregular and sub-parallel layers of sphalerite, pyrite and galena. These lenses occur from footwall to hanging-wall, varying from few centimetres to tens of metres. Galena is seen as the most deformed mineral, commonly re-crystallised into coarse grains. Galena also exhibits curved cleavage and elongated and foliated grains. Zonation of the sulphides is not clear.

The Mavres Petres orebody is some 500 metres in strike length, between 100 and 340 metres in dip extent. The true width is on average 25 metres. The strike of the orebody is close to east west and the dip is 30° to the south.

The Mavres Petres orebody shows an average gold grade of around 4 to 6 g/t Au. Its presence is strongly associated with the arsenical pyrite and arsenopyrite, which appears to be a different stage of mineralisation within the matrix of hydrothermal breccias or in veins cutting the Pb-Zn sulphides. The gold mineralisation is not coincident with the massive sulphide mineralisation. The gold is completely refractory and not considered to be of any economic value.

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

Operations at Stratoni were suspended at the end of 2021.
CommodityUnits2021202020192018201720162015
Lead / Zinc kt  ....  Subscribe  ....  Subscribe3737374840
All production numbers are expressed as concentrate.

Operational metrics

Metrics2021202020192018201720162015
Annual processing capacity  ....  Subscribe
Waste  ....  Subscribe  ....  Subscribe
Tonnes processed  ....  Subscribe  ....  Subscribe174,866 t146,726 t150,734 t184,963 t154,992 t

Production Costs

CommodityUnits20212020201920182017
Cash costs (sold) Lead / Zinc USD  ....  Subscribe  ....  Subscribe 1,331 / t   1,135 / t   1,062 / t  

Financials

Units20212020201920182017
Sustaining costs M USD  ....  Subscribe  ....  Subscribe 9.3   0.6  
Revenue M USD  ....  Subscribe  ....  Subscribe 47.5   41.9   51.2  
Gross profit M USD 5.8  
Earnings M USD  ....  Subscribe  ....  Subscribe -7.3   1.4  

Heavy Mobile Equipment

Fleet data has not been reported.

Personnel

Mine Management

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Apr 28, 2024
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EmployeesContractorsTotal WorkforceYear
...... Subscription required ...... Subscription required ...... Subscription required 2022
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Aerial view:

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