Pitfield titanium prospect11 Jun 2023 19:09
The recent confirmation of a large-scale hydrothermal mineral system at Pitfield. enriched in titanium. has inevitably led to the posting of details of 'comparable' prospects, especially elsewhere in western Australia, but without any analysis of the possible significance of such comparisons. Details of % TiO2 grades, resource tonnage etc may seem to be of value but alone are of limited significance in assessing the possible potential of the Pitfield discovery.
In a post on 6th June, I mentioned that I was aware of 11 proposed and exploration phase 'hard-rock' titanium prospects in W Australia, to which can now be added a further 17, including those in layered intrusions of metamorphic origin, and a few in carbonatites and volcanoclastic rocks. There are also 22 inland placer deposits and 90+ coastal heavy mineral sand deposits in various stages of development. The numbers serve to emphasise the danger of drawing misleading conclusions from selective comparisons with Pitfield. Valid conclusions can however be drawn from more generalised comparisons.
Firstly, almost all of the W Australia production of Ti and TiO2 is derived from its heavy mineral sand and placer deposits. The W Australian Government intends to at least maintain if not increase total production whilst simultaneously reducing coastal heavy mineral mining, for environmental reasons. Hence a move to inland 'hard-rock' and alternative sources and in consequence a regulatory framework which will presumably be favourable towards Pitfield. None of the 'hard-rock' projects are in production yet but several are sufficiently advanced to indicate anticipated viability and will have laid the procedural foundations for Pitfield if it meets all feasibility criteria.
Secondly, in accordance with national policies of reducing exports of critical minerals especially to China and of maximising the processing and utilization of such materials in-country, industry is developing enhanced metallurgical extraction processes for Titanium including two developed by, or in association with, CSIRO [Commonwealth Scientific & Industrial Research Organization] in Australia. The TiRO Process produces Ti powder of high purity and the Tivan+ Process, Vanadium, feedstock for Ti pigment, and Fe. A plant to be constructed at Darwin will apply the Tivan+ Process to ore from the Speewah Project [NW Aus] which has a JORC-compliant resource of 4.7 billion tonnes @ 3.3% TiO2 in titanomagnetite. It is intended that the plant will take different ores from other prospects. Metallurgical tests of the potential mineral ores from Pitfield will determine which, if either, of these processes is appropriate, or if a different process such as Kroll or Hunter, or indeed of the many others under development is preferable. This is a complex and fast moving field which reflects the many new applications to which Ti [metal], TiO2 [dioxide] and other derivatives can and may be applied.
To be continued