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Australia
Savannah Operation (Savannah North Expansion Project)

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 Location:
105 km N from Halls Creek, Western Australia, Australia
  Address:
PMB 19
Kununurra
Western Australia, Australia
6743
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Overview

StageProduction
Mine TypeUnderground
Commodities
  • Nickel
  • Copper
  • Cobalt
Mining Method
  • Longhole open stoping
  • Cemented backfill
  • Paste backfill
Production Start...
Mine Life10 years (as of Jan 1, 2022)
On 15 April 2020, as a result of the combination of significant operational uncertainty, disruption and cost escalation caused by COVID restrictions, a slower ramp up than planned, and depressed commodity prices the Company elected to suspend operations at the Savannah Nickel Mine.

Operations at Savannah were restarted in 2021 and the Project was successfully recommissioned with first concentrate shipment achieved in December 2021.

Owners

Source: p. 92
CompanyInterestOwnership
Panoramic Resources Ltd. 100 % Indirect

Contractors

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Deposit Type

  • Magmatic
  • MMS

Summary:

Savannah mineralisation.
The original Savannah sulphide rich nickel, copper and cobalt orebody is hosted by the layered mafic-ultramafic Savannah Intrusion which is enveloped by aluminous metasediments and para-gneisses of the Tickalara Metamorphics. The Savannah Orebody is mostly confined to a marginal norite unit up to 40 metres thick developed above the base of the intrusion. Areas of massive, matrix and disseminated sulphide mineralisation, dominated by pyrrhotite, chalcopyrite, pentlandite and minor pyrite occur throughout the marginal norite unit.

Prior to the development of the Savannah Open Pit, the marginal norite unit outcropped as a prominent 250 metre long limonite-goethite gossan with fresh sulphide mineralisation developing approximately 20 metres below surface. At approximately 500 metres below the surface, a significant sub-horizontal fault, the 500 Fault, cuts the orebody and offsets it 200 metres to the northwest. A similar fault at approximately 900 metres below surface, the 900 Fault, offsets the orebody a further 250 metres to the northwest. Mineralisation above the 500 Fault is referred to as the “Upper Zone”, between the 500 and 900 faults as the “Lower Zone” and below the 900 Fault as the “sub 900 Fault Zone”.

Savannah North mineralisation.
The SNM (Savannah North mineralisation) is based on mining ore associated with the Savannah Intrusion; a palaeo-proterozoic mafic/ultramafic magma conduit. The Ni-Cu-Co rich massive ........

Mining Methods

  • Longhole open stoping
  • Cemented backfill
  • Paste backfill

Summary:

Savannah
Ore production is undertaken via conventional long hole open stoping with remote bogging on retreat. Currently, the long hole drilling is undertaken by a contractor. Savannah purchased a used Cabletec drilling rig for ground support and as a backup production drill, as required. The mine plan requires open stopes to be backfilled with cemented paste fill to maximise recovery of the orebody and to assist geotechnical stability of the mine.

Savannah North.
An undiluted stope minimum mining width (MMW) of 3.0 m (true width) was applied to the Savannah Nth mining area. This is achievable based on the sub-level interval of 20 m floor to floor as from knowledge gained in the mining of the Savannah orebody.

Drill and blast assumptions have been based on historical performance at Savannah. Long hole size is 89 mm diameter and drill metres are based on 6 t / drill m including slotting.

The existing fill system will be utilised for paste filling of the Savannah North stopes. A new paste fill hole is planned for the Savannah Nth, to be drilled from the surface via 1570DD. Dump valves shall be installed at intervals of 200 vertical metres to protect the paste line in case of paste blockages. Additionally, a backup hole is planned to be drilled to mitigate the risk of downtime due to unexpected blockages. Where opportunities arise, waste rock will be backfilled into stopes either via a dedicated truck fill pass or by loader. When back fi ........

Crushing and Grinding
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Processing

Flow Sheet: Subscription required

Summary:

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Production:
Commercial production was achieved from 1 April 2022.

CommodityProductUnits2023202220202019
Nickel Metal in concentrate kt  ......  Subscription required ^  ......  Subscription required  ......  Subscription required  ......  Subscription required
Copper Metal in concentrate t  ......  Subscription required ^  ......  Subscription required  ......  Subscription required  ......  Subscription required
Cobalt Metal in concentrate t  ......  Subscription required ^  ......  Subscription required  ......  Subscription required  ......  Subscription required
Nickel Concentrate kt  ......  Subscription required  ......  Subscription required
^ Guidance / Forecast.
Subscription required - Subscription is required.

Operational Metrics:

Metrics202220202019
Ore tonnes mined  ......  Subscription required372,842 dmt281,817 t
Tonnes milled  ......  Subscription required388,759 dmt276,039 t
Subscription required - Subscription is required.

Reserves at June 30, 2020:
Mineral Resource cut-off grade is 0.50% Ni.
Savannah & Savannah North Ore Reserve average cut-off (NSR) of $135/t.

CategoryTonnage CommodityGradeContained Metal
Proven 3.028 Mt Nickel 1.1 %
Proven 3.028 Mt Copper 0.59 %
Proven 3.028 Mt Cobalt 0.07 %
Probable 5.246 Mt Nickel 1.28 %
Probable 5.246 Mt Copper 0.57 %
Probable 5.246 Mt Cobalt 0.09 %
Proven & Probable 8.274 Mt Nickel 1.23 % 101.8 kt
Proven & Probable 8.274 Mt Copper 0.59 % 48.5 kt
Proven & Probable 8.274 Mt Cobalt 0.08 % 7 kt
Measured 2.896 Mt Nickel 1.47 %
Measured 2.896 Mt Copper 0.71 %
Measured 2.896 Mt Cobalt 0.09 %
Indicated 7.463 Mt Nickel 1.62 %
Indicated 7.463 Mt Copper 0.76 %
Indicated 7.463 Mt Cobalt 0.11 %
Inferred 3.097 Mt Nickel 1.5 %
Inferred 3.097 Mt Copper 0.48 %
Inferred 3.097 Mt Cobalt 0.09 %
Total Resource 13.456 Mt Nickel 1.56 % 209.8 kt
Total Resource 13.456 Mt Copper 0.7 % 94.2 kt
Total Resource 13.456 Mt Cobalt 0.1 % 13.7 kt

Commodity Production Costs:

CommodityUnits20232022
Total cash costs Nickel AUD  ......  Subscription required  ......  Subscription required
All-in sustaining costs (AISC) Nickel AUD  ......  Subscription required
All-in costs Nickel AUD  ......  Subscription required
^ Guidance / Forecast.
† Net of By-Product.
Subscription required - Subscription is required.

Financials:

Units202320222020
Capital expenditures (planned) M AUD  ......  Subscription required
Sustaining costs M AUD  ......  Subscription required
Growth Capital M AUD  ......  Subscription required
Revenue M AUD  ......  Subscription required
Gross profit M AUD  ......  Subscription required
Pre-tax Income M AUD  ......  Subscription required
After-tax Income M AUD  ......  Subscription required
Operating Cash Flow M AUD  ......  Subscription required
Subscription required - Subscription is required

Proposed Heavy Mobile Equipment as of July 31, 2020:
HME TypeModelQuantityLeased or
Contractor
Drill (long hole) ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
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....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required Leased
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Sep 20, 2022
....................... Subscription required ....................... Subscription required Subscription required Sep 20, 2022
....................... Subscription required ....................... Subscription required Subscription required Sep 20, 2022
....................... Subscription required ....................... Subscription required Subscription required Sep 20, 2022
....................... Subscription required ....................... Subscription required Subscription required Sep 20, 2022
....................... Subscription required ....................... Subscription required Subscription required Sep 20, 2022
Subscription required - Subscription is required.

Staff:

Total WorkforceYear
Subscription required 2022
Subscription required 2019
Subscription required 2015

Corporate Filings & Presentations:

DocumentYear
Annual Report 2022
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
Annual Report 2018
Annual Report 2017
Corporate Presentation 2017
Feasibility Study Report 2017
Press Release 2016
Press Release 2016
Annual Report 2015
Subscription required - Subscription is required.

Subscription required - Subscription is required.

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