Atlantic

Windimurra Vanadium Project

Overview

In May 2016, Atlantic Vanadium Pty Ltd, a new wholly-owned subsidiary of Atlantic, acquired all the assets of the Windimurra project, including the mining leases, plant and equipment and related assets at the Windimurra site.

Windimurra is a fully approved world-scale vanadium mine with historic investment in plant and infrastructure in excess of A$500 million.  When in production, Windimurra will have the potential to produce 4,800 tonnes of contained vanadium per annum and approximately 1,000,000 tonnes of iron ore fines per annum.

The Windimurra project is currently on care and maintenance with a structured infrastructure preservation program in place to maintain the integrity of key equipment on site.

In addition, a highly experienced team made up of Atlantic staff and external specialists is undertaking an optimisation study for the project with a view to preparing for the redevelopment of the project when market conditions allow.  The key focus areas of the review include:

  • Resource definition and interpretation;
  • Geometallurgical performance of various ore body domains;
  • Value adding production options and cost reduction measures; and
  • Process de-bottlenecking, simplicity and reliability.

With a mineral resource of over 235 million tonnes from 6 kilometres of a highly prospective 27 kilometre strike length, there is significant upside to grow the resource base of the project.  Work is progressing to realise the potential of significant inventories of high TiO2 ore and DSO iron ore from future operations.  This will provide significant cost advantages to the project.  In addition, with some of the highest quality V2O5 flake in the world, Windimurra is ideally positioned to service the rapidly growing Vanadium Flow Battery (VFB) industry through provision of high purity vanadium electrolyte.

With over A$500 million of existing investment in process plant and infrastructure, Windimurra is well placed to re-start operations to reliably deliver high purity vanadium products to world markets.

Crushing and Beneficiation Plant

Location

The Windimurra vanadium and iron ore project is located approximately 600 kilometres north of Perth and 80 kilometres by road from Mount Magnet in Western Australia.

The Windimurra deposit lies within the eastern flank of the large (>2,000km²) Windimurra intruded layered gabbro complex, which is part of the regional Murchison granite-greenstone province.

Windimurra Site

Geological Studies

Mineral Resources

The Windimurra mineral resource estimate is based on a 6 kilometre strike length and was reported in 2014. The total resource is 235 million tonnes at 0.49% V2O5, using a lower cut-off of 0.275% V2O5.

Below is a typical cross section showing the layout of the principal geological domains at Windimurra.

Geological section

East-West Geological Section

Mineral Resources - Windimurra Vanadium Project (at a 0.275% V2O5 cut-off)

 

30 October 2014

 Classification

Tonnes
(Mt)

V2O5
(%)

Measured

49

0.48

Indicated

136

0.50

Inferred

49

0.47

TOTAL

235

0.49

Ore Reserves

The ore reserve base of the project is based on an ore reserve estimate from an optimised 4.7 kilometre core of the resource base reported in 2014.  The total ore reserve is currently 55.1 million tonnes at 0.49% V2O5, using a lower cut-off of 0.275% V2O5.

Pit Layout Plan

Overall Pit Layout Plan

March 2015 Ore Reserves

Classification

Tonnes
(Mt)

V2O5 
(%)

Contained Metal Vanadium
(kt)

Proved

14.4

0.48

38.7

Probable

40.7

0.50

114.0

TOTAL

55.1

0.49

151.0

Work has now commenced to review the 2014 resource to evaluate opportunities to improve the understanding of the key inter-relationships between V2O5, TiO2 and Fe grades combined with the weathering profile and structural domains.

This work is aimed at developing a mine plan that provides maximum project value whilst maintaining the highest quality product.

Exploration

The acquisition of the Windimurra project included a package of 100% owned mining tenements covering a total strike length of 27 kilometres of prospective ground for titano-vanadium and magnetite based iron ore-style mineralisation.  The current mineral resource is based on the northern 6 kilometre corridor within the 27 kilometre strike.  This leaves an extensive 21 kilometre strike package unexplored to the south.

Mining lease holdings

Tenement Map Showing Significant Mining Lease Holdings

A high resolution aero-magnetic response survey was undertaken over the ground in 2007, with further detailed fill-in lines undertaken in 2008.  The responses showed that the high magnetic gabbros associated with the lower layered sequence of the Shepherd's Discordant Zone, which hosts the titano-vanadium horizon at Windimurra, extends through the acquired southerly tenement holdings.

Exploration of the region has a limited history, with several companies undertaking low level reconnaissance surveys (Hawkstone Minerals and Ferrovanadium Corp in the 1970's and early 1980's; an Alcoa Australia and BHP Minerals Joint Venture in the mid-1980's and Precious Metals Australia in 1989).  All exploration and resource development works were undertaken within the northern 6 kilometre strike length that now forms the Windimurra vanadium mine.

Aeromagnetic Signature - Windimurra Southerly Extensions

First exploration on the southern strike was initiated in January 2011, via 5 traverse lines of reverse circulation drilling, 5 kilometres apart, across the high magnetic signature.  

This scout drill program was not designed nor intended to return a quantifiable mineral resource, but to be used as a tool in confirming the overall geological setting and weathering states, and to return an understanding into the broad V2O5, Fe and TiO2 grade distributions within the belt.  As such, it was designed as a preliminary stepping stone in the development of a future targeted strategy for these tenements.

The scout program was successful in confirming the continuous presence of the main vanadium-magneto horizon as expressed in the Shepherd's Discordant Zone (SDZ) at Windimurra, for the strike length of the southerly tenement holdings.  Widths of mineralisation and grades of vanadium bearing units were comparable to Windimurra for the first 9 kilometres south of the proposed current life of mine pit design, and then reduced to approximately half the width by the time the southern extent was reached.  Importantly, the vanadium grade was maintained.

3D of Aeromagnetic signature with drill lines

3D of Aeromagnetic Signature with Drill Lines 

Atlantic is committed to future systematic further exploration of this highly prospective southern extension of the known Windimurra deposit. Future programs will include follow up exploration and definition of resources based on the previously identified 0.80% V2O5 outcropping massive magnetite hosted beds that outcrop.

Competent Person Statement

Mineral Resources and Exploration Activities
The information in this report relating to Exploration Activities and Mineral Resources is based on information prepared by AMC in 2014 and complies with the JORC Code 2012.

Ore Reserves
The information in this report that relates to Ore Reserves is based on information compiled under the direction of Mr David Varcoe.  Mr Varcoe is a Member of the Australasian Institute of Mining and Metallurgy (AusIMM) and is employed by AMC.  Mr Varcoe has experience relevant to the type of deposit under consideration to qualify as a Competent Person as defined in the JORC Code 2012.  Mr Varcoe visited the site during 2014.