Australia

Henty Mine

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Overview

Mine TypeUnderground
StatusActive
Commodities
  • Gold
Mining Method
  • Bench stoping
  • Avoca
  • Cut & Fill
  • Longhole stoping
Backfill type ... Lock
Production Start... Lock
Mine Life... Lock
SnapshotThe Henty Gold Mine in Tasmania is a high grade, underground gold-silver mine with established infrastructure and significant exploration upside in the mineral rich Mt Read Volcanic belt in West Coast Tasmania, proximate to world class deposits .

Key to Henty’s success is increasing mine life, lifting its production rate and lowering its costs. To achieve this, Catalyst has invested heavily in exploration.

Owners

SourceSource
CompanyInterestOwnership
Catalyst Metals Limited 100 % Indirect
Henty Gold (Pty) Ltd. (operator) 100 % Direct
In January 2021, Catalyst acquired 100% of the shares and voting rights in Unity Mining Mining Pty Ltd and its 100% owned subsidiary, Henty Gold Mine Pty Ltd (the entity that owned the Henty Gold Mine asset).

Contractors

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Deposit type

  • Volcanic hosted
  • Vein / narrow vein
  • VMS

Summary:

Henty is a narrow vein deposit and the mineralised zones of interest occur at depth in fresh rock. The mineralisation generally strikes N-S and has been divided into twelve mining areas. The mineralisation consists of a series of small high-grade lenses of gold mineralisation hosted in quartz-sericite altered volcaniclastic and volcanic rocks that occupy a large sub-vertical quartz-sericite alteration shear zone. Gold is present as both free gold and as gold-rich electrum associated with chalcopyrite and galena in the main mineralised zone. The mineralisation has a shallow plunge to the south.

Henty Mine is a structurally controlled deposit. The Henty Fault is a major structure running NE-SW. Minor multiple faults have been intersected by drilling and underground development.

Mineralization
Mineralisation occurs in the form of pyrite, chalcopyrite, galena, sphalerite, and minor tellurides and bismuth sulpho-salts. High gold grades are associated with intense silicification.

Deposit Style
The oldest rocks in the Red Hills area are rhyodacitic lavas of the MRV, with intercalated black siltstone and shale (correlated with the Central Volcanic Sequence). These volcanic and volcaniclastic sequences are exposed on the eastern limb of an interpreted south - plunging syncline. Massive, quartz-phyric lavas (Mt Julia Rhyolite) and quartz-phyric volcaniclastic sediments, correlated with the Tyndall Group, occur stratigraphically above the CVC rocks in the keel of the interpreted synclinal structure. These younger rocks are also exposed along the overturned western limb of the syncline, truncated by the Henty Fault in proximity to the Henty Mine.

Three deposit types have been identified in the area within the Project.

Stratabound base metal sulphides + gold + silver VMS mineralisation hosted by Central Volcanic Complex (CVC) mass flow units (Lower Mineralised Horizon).

Vein and disseminated copper+gold+magnetite mineralisation associated with chlorite+feldspar alteration of the Red Hills lava. Earliest prospecting and small-scale mining activity concentrated on this type of mineralisation, as at the Northern Adits area.

Structurally controlled, Intrusion-Related Gold (IRG) mineralisation along the Henty Fault at Sterling Valley and Lakeside. This mineralisation has a very strong association with arsenopyrite, with arsenic concentrations above 1% in some instances. IRG mineralization also exhibits a strong correlation with pyrrhotite. Fluids related to an underlying Devonian granite appears to have more influence on the style of mineralisation than at Henty Gold Mine.

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

Production Results for 2021 are reported from 20 January to 30 June 2021 only, as the Henty sale settled on 20 January 2021.
CommodityUnits2023202220212020
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All production numbers are expressed as metal in doré.

Operational metrics

Metrics202320222021
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Production Costs

CommodityUnits202320222021
Cash costs Gold AUD  ....  Subscribe  ....  Subscribe  ....  Subscribe
All-in sustaining costs (AISC) Gold AUD  ....  Subscribe  ....  Subscribe  ....  Subscribe

Financials

Units202320222021
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Heavy Mobile Equipment

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Personnel

Mine Management

Job TitleNamePhoneProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Dec 20, 2023
....................... Subscription required ....................... Subscription required ........... Subscription required Subscription required Dec 20, 2023
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Total WorkforceYear
...... Subscription required 2022
...... Subscription required 2021

Aerial view:

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