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Australia
Henty Mine

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 Location:
23 km N from Queenstown, Tasmania, Australia

  Address:
Howards Rd
Queenstown
Tasmania, Australia
7467
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeUnderground
Commodities
  • Gold
Mining Method
  • Cut & Fill
  • Bench stoping
  • Avoca
  • Backfill
Production Start...
Mine Life5 years (as of Jan 1, 2022)
The Henty Gold Mine (past producing mine) consisting of an underground mine and a nameplate capacity 300,000tpa conventional CIL processing plant.

Inaugural gold pour occurred in late January 2021.


Owners

Source: p. 54,59
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


Summary:

The Henty deposit lies within the Mt Read Volcanic (MRV) Belt in western Tasmania. The belt hosts several world-class polymetallic ore bodies including the Hellyer, Que River, Rosebery, Hercules and Mount Lyell deposits. The whole belt has been overprinted with a regional lower green schist facies metamorphism. 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 main part of the resource extends for a strike length of approximately 3,300 m. Plan width varies from 2 m to 5 m for some lodes up to 10–20 m wide for the main mineralised structures. The reported Mineral Resource plunges to the south and occurs between 50 m and 850 m of surface. The reported Mineral Resource is comprised of 11 separate model areas covering the dimensions of the deposit as follows: 16 Sill Zone, 17 Intermediate Zone, 18 Zone 15, 19 Zone 96, 20 Newton Zone 21, Mt Julia 22, Read Zone, 23 Darwin North, 24 Darwin Central, 25 Darwin South, 26 Tear Away Zone. 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 b ........


Mining Methods

  • Cut & Fill
  • Bench stoping
  • Avoca
  • Backfill


Summary:

The Henty Mine uses bench mining and flatback mining as the principle means of ore extraction. In selected places where development allows, a modified Avoca method has been used with success. Mining method selection is based on: • Width and grade of the ore • Regularity along strike and up dip • Proximity to the Henty Fault zone • General ground conditions Each orebody has unique characteristics. Where conditions permit, benching provides the most costeffective method of extraction. Where the ore value is high, but ground conditions are critical to minimising dilution flatback mining is preferred. In bench stoping, heights are limited to 12-15m. Where it is economic to do so, development is completed top and bottom. The choice of uphole or downhole drilling is based on geometry of the ore. Extraction is bottom up. As a generality, the mining areas in the lower section of the mine have wider widths, more modest grades and are away from the Henty Fault. Conversely the upper areas of the mine tend to be higher grade, narrow and occasionally interact with the Henty Fault. Production drilling is carried out using a long hole drill rig equipped with a Minnovare Production Optimiser system for drillhole accuracy. Blasting is carried out using ANFO and electronic detonators. Majority of the stopes will be filled using unconsolidated rock fill trucked from surface or underground development waste. This will improve stope stability and increase ore recovery while minimising th ........


Crushing and Grinding
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Processing

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Summary:

- subscription is required.


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
Gold oz  ......  Subscription required ^  ......  Subscription required  ......  Subscription required  ......  Subscription required
All production numbers are expressed as metal in doré. ^ Guidance / Forecast.
Subscription required - Subscription is required.

Operational Metrics:

Metrics20222021
Total tonnes mined  ......  Subscription required  ......  Subscription required
Ore tonnes mined  ......  Subscription required  ......  Subscription required
Tonnes processed  ......  Subscription required  ......  Subscription required
Annual processing capacity  ......  Subscription required  ......  Subscription required
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Reserves at June 30, 2022:
Ore Reserves utilises a 2.7g/t breakeven cut-off, and 1.9g/t incremental cut-off grade.

Mineral Resources are estimated at a 1.7g/t cut-off.

CategoryTonnage CommodityGradeContained Metal
Probable 983 kt Gold 3.6 g/t 115 koz
Indicated 1.8 Mt Gold 4.5 g/t 257 koz
Inferred 0.9 Mt Gold 4 g/t 111 koz
Total Resource 2.6 Mt Gold 4.3 g/t 368 koz

Commodity Production Costs:

CommodityUnits20222021
Cash costs Gold AUD  ......  Subscription required  ......  Subscription required
All-in sustaining costs (AISC) Gold AUD  ......  Subscription required  ......  Subscription required
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Financials:

Units20222021
Revenue M AUD  ......  Subscription required  ......  Subscription required
EBITDA M AUD  ......  Subscription required  ......  Subscription required
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Heavy Mobile Equipment:

Mine Management:

Job TitleNamePhoneProfileRef. Date
....................... Subscription required ....................... Subscription required ....................... Subscription required Subscription required Nov 19, 2022
....................... Subscription required ....................... Subscription required Subscription required Nov 19, 2022
....................... Subscription required ....................... Subscription required Subscription required Nov 19, 2022
....................... Subscription required ....................... Subscription required Subscription required Nov 19, 2022
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Staff:

Total WorkforceYear
Subscription required 2022
Subscription required 2021

Corporate Filings & Presentations:

DocumentYear
Annual Report 2022
Quarterly Report 2022
Year-end Mineral Reserves 2022
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
Subscription required - Subscription is required.

Subscription required - Subscription is required.

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