Rare Earths srx-125 Apr 2013 10:57
ree
http://www.investegate.co.uk/article.aspx?id=201103031027352662C
Rare earths mineralization confirmed by independent laboratory at grades of 2.2% in existing HTT stream
· Rare earth mineralization contained in a by-product stream of existing and ongoing rutile production, which has already been mined and partially processed
· Study commenced to evaluate processing requirements to further separate and recover rare earths
Sierra Rutile Limited announces that SGS Lakefield Research Limited ("SGS") has confirmed the existence of rare earth oxides ("REOs") at a grade of 2.2% in Sierra Rutile's high-tension tailings ("HTT") stream. As part of the Company's recently announced strategic review update, significant rare earth mineralisation was identified and, following SGS' independent assessment, the Company is now exploring opportunities to refine and market these REO by-products.
The distribution of REOs in the HTTs is attractive and contains high concentrations of neodymium, lanthanum and praseodymium. HTTs are produced from Sierra Rutile's existing dry processing plant and, as such, the REOs are not in the ground, but in a by-product stream from Sierra Rutile's existing production of rutile and ilmenite. The HTTs are the same source from which Sierra Rutile already recovers its zircon by-product by re-processing it through the dry processing plant.
Sierra Rutile will now commence a study into how best to separate and recover the REOs from the HTTs. This will consider both the optimization of Sierra Rutile's existing dry processing plant and the potential addition of further processing facilities to realize the value of the REO in the HTTs. Sierra Rutile will also analyse its existing stockpiles of HTTs from historical production to determine the availability of REOs in these stockpiles. The Company will announce the results of the study and analysis in due course.
John Sisay, Chief Executive Officer of Sierra Rutile, commented, "The independent confirmation of rare earth mineralization in the tailings stream is a positive step and we now have clarity on the type and extent of these minerals. Sierra Rutile is assessing the feasibility of future rare earth production given the relatively attractive cost position of processing rare earths which are already extracted and significantly refined as part of our normal rutile separation process. The market dynamics and long-term fundamentals of the REO industry are attractive and we have therefore taken the decision to proceed with further studies."
Sierra Rutile's existing operations generate approximately one tonne of HTTs for every two tonnes of rutile produced. The Company's 2010 rutile production of 68,000 tonnes produced approximately 34,000 tonnes of HTT last year.
Samples from 14 locations in the HTT stream were analysed by SGS. Locations were chosen based on processing methods, the conductivity and radioactivity