Australia

Savannah North Expansion Project

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Categories

Overview

Mine TypeUnderground
StageConstruction
Commodities
  • Nickel
  • Copper
  • Cobalt
Mining Method
  • Longhole open stoping
  • Cemented paste backfill
Production Start... Lock
Mine Life12 years (as of Jan 1, 2021)
ShapshotIn FY24 five working levels will be open at Savannah North compared to two at the start of FY23.

In addition, the Savannah extension (an area below the historical Savannah workings) will come into production for the very first time.
Related AssetSavannah Operation

Owners

SourceSource
CompanyInterestOwnership
Panoramic Resources Ltd. 100 % Indirect
Panoramic Resources Ltd. owns 100% interest in the Savannah North Project through it's wholly owned subsidiary Savannah Nickel Mines Pty Ltd.

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 sulphide mineralisation occurs as “classic” magmatic breccias developed about the more primitive, MgO rich basal parts of the conduit.

Magmatic Ni-Cu-Co sulphide Resources hosted by the Savannah North Intrusion (SNI) located to the north of the Savannah Mine.

The Savannah North mineralisation dips moderately (40- 45 degrees) to the north-west and comprises two main zones, the Upper Zone is developed on the basal contact of the North Olivine Gabbro, the second Lower Zone is a consistent remobilised zone of massive sulphide mineralisation, in part associated with the 500 Fault. Both zones are well defined by the drilling and the interpretation is considered sufficiently robust for resource modelling. Additional minor mineralised zones include 5 domains in the hanging wall position to the Upper Zone and a minor mineralized sub-vertical fault.

The Savannah North mineralisation has been defined over a strike length of approximately 1 kilometre with clear indications from geophysics it could extend over 2km. The Resource relates to an area with a strike length of 1,010m from 5,350mE to 6,360mE and extends from 750m to 1,750m below surface with an average domain thickness of approximately 5 metres.

Reserves

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Mining Methods

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Comminution

Crushers and Mills

Milling equipment has not been reported.

Summary:

Savannah ore has been successfully treated through SAG mill since commissioning in 2004.

Subsequent to the restart further works were completed including the replacement of the Jaw crusher and SAG mill motor. A full set of filters plates is onsite ready for installation.

Processing

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Production

CommodityUnitsAvg. Annual
Nickel t 9,072
Copper t 4,683
Cobalt t 676
All production numbers are expressed as metal in concentrate.

Operational metrics

Metrics
Ore tonnes mined, LOM 00000
Tonnes processed, LOM 00000
Annual ore mining rate 000
* According to 2021 study.

Production Costs

CommodityUnitsAverage
All-in costs Nickel AUD 0000000
Assumed price Cobalt AUD 000
Assumed price Nickel AUD 000
Assumed price Copper AUD 000
* According to 2021 study / presentation.
Net of By-Product.

Project Costs

MetricsUnitsLOM Total
Initial CapEx $M AUD  ......  Subscribe
Gross revenue (LOM) $M AUD  ......  Subscribe
Pre-tax Cash Flow (LOM) $M AUD  ......  Subscribe
Pre-tax NPV @ 8% $M AUD  ......  Subscribe

Heavy Mobile Equipment

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Personnel

Mine Management

Source Source
Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Nov 3, 2023
....................... Subscription required ....................... Subscription required Subscription required Nov 3, 2023
....................... Subscription required ....................... Subscription required Subscription required Jul 28, 2020

Aerial view:

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