Australia

Deflector Operation

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Categories

Overview

Mine TypeUnderground
StatusActive
Commodities
  • Gold
  • Copper
Mining Method
  • Longhole open stoping
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SnapshotThe Deflector Region Operation is comprised the Deflector and Rothsay underground mines and Deflector processing facility.
Related AssetsDeflector Mine, Rothsay Mine

Owners

SourceSource
CompanyInterestOwnership
Silver Lake Resources Ltd. 100 % Indirect
Silver Lake Resources controls a 100% interest in M59/442 and M59/356 via its 100% owned subsidiaries Deflector Gold Pty Ltd and Gullewa Gold Project Pty Ltd respectively.

Silver Lake Resources controls a 100% interest in tenements M59/39 and M59/40 (Rothsay).

Silver Lake (Deflector) Pty Ltd (a wholly owned subsidiary of Silver Lake Resources Ltd) operate the Deflector Gold Copper Mine.

Contractors

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Deposit type

  • Orogenic
  • Vein / narrow vein

Summary:

The Deflector Region Operation is comprised the Deflector and Rothsay underground mines.

Deflector
The deposit type is classified as a hybrid Archean orogenic gold-copper deposit within the Gullewa greenstone sequence. The deposit comprises a series of en-echelon veins hosted within a flexure in the greenstone stratigraphy.

Locally, the mineralisation is hosted in five main vein sets, the Western, Central, Da Vinci, Contact and Deflector South-West Lodes. Ongoing work at Deflector Southwest indicates that it is likely the continuous strike extension of Western domain. The main lodes are narrow, sub-parallel, fault-hosted, quartz-sulphide veins within a thick sequence of high-Mg basalt intruded by a series of dacitic, dolerite, and lamprophyric dykes. The mafic sequence is bound in the east by a volcanic-clastic unit, and in the west by an ultramafic unit. The metamorphic grade is defined as lower green-schist facies.

The Deflector resource extents are 1,600m strike, 430m across strike and 630m below surface and open at depth. These extents host approximately 56 known ore zones (ore domains). The ore zones vary between 0.3 to 5m in width.

Rothsay
The Rothsay Gold Mine is located within the Warriedar Greenstone gold belt, an Archaean sequence of mafic, ultra-mafic, meta-volcanic and sedimentary rocks folded in an anticlinal formation which plunges and strikes to the north-northwest with steeply dipping limbs.

The deposit is hosted in three discrete areas and within five individual shear zones. Woodley’s Shear (formerly A Shear). Woodley’s East and associated HW shears (formerly H Shear) occur to the east of the main Woodley’s Lode. Orient Shear (formerly B Shear) and Clyde and Clyde East Shears (formerly C and D Shears) occur in a second area further west and Miners Shear (formerly E Shear) occurs as an isolated shear in the north west.

The Woodley Shear is located at the contact between serpentinised peridotite and a porphyritic pyroxenite. The serpentinite forms the hanging wall unit. A sequence of mafic volcanic and sub-volcanic sills forms the hanging wall to the serpentinite.

The Woodley’s Shear is characterised by several generations of quartz veining with adjacent tremolite alteration. The early quartz phase is typically blue-black due to the partial replacement of alumina by chromium oxide. The shear zone is typically two to five metres thick and mineralisation does not typically occur outside the shear zone. The main gold mineralisation is associated with shear-hosted quartz veins of blue and white quartz of up to 3m thickness. The footwall porphyritic dolerite is relatively unaltered, while the hanging wall serpentinite is strongly foliated and has been subject to intense, though patchy tremolite alteration.

The Rothsay resource extents are 1,500m strike, 300m across strike and 400m below surface and open at depth. These extents host approximately 17 interpreted ore lodes . The lodes vary between 0.1 to 2m in width.

Domain continuity was nominally extrapolated to no more than half the average drill spacing at the spatial extents of available data.

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

CommodityProductUnits2023202220212020201920182017
Gold Metal in concentrate koz  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe22
Gold Metal in doré koz  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe65
Gold Metal in conc./ doré koz  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe876549
Copper Metal in concentrate t  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe2,7673,4004,599
Copper Concentrate kt  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe14
Gold Equivalent Metal in conc./ doré oz  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe97,063

Operational metrics

Metrics202320222021202020192017
Ore tonnes mined  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe633,896 t429,614 t
Tonnes milled  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe607,116 t444,987 t
Annual processing capacity  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe480,000 t

Production Costs

CommodityUnits20242023202220212020201920182017
Credits (by-product) Gold AUD  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe -123 / oz  
All-in sustaining costs (sold) Gold AUD  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe 1,048 / oz **  
All-in sustaining costs (AISC) Gold AUD 1,190 / oz **   1,018 / oz **  
^ Guidance / Forecast.
** Net of By-Product.

Financials

Units20232022202120202017
Capital expenditures M AUD  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe
Revenue M AUD  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe 97.3  
Pre-tax Income M AUD -17.9  
EBITDA M AUD  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe

Heavy Mobile Equipment

Fleet data has not been reported.

Personnel

Mine Management

Job TitleNamePhoneEmailProfileRef. Date
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Aerial view:

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