The recovery of Cesium from a mineral sample from the Taron target deposit has been demonstrated. The mineral sample was obtained from the 2009 drill program (drill hole number TAR-09-5). A sub-sample was crushed and ground to a particle size of 100 microns (P80). The Cesium content of the sample was analyzed at 4761 ppm or 0.476%. A full analysis is shown in Table 1 below.
The metallurgical treatment of this sample was demonstrated at the University of British Columbia (UBC), Department of Materials Engineering, Vancouver, Canada.
- 94.7 % extraction of Cesium after 4 hours of leaching at 90 C with 250 g/L H2SO4 and 20 % Solids
- Recovery of 97.8 to 99.4% of the Cesium as a Cesium Aluminum Sulfate (Alum) precipitate after addition of aluminum sulfate and cooling to 4 C.
- Purification of the Cesium-containing alum using (1) re-dissolution and re-precipitation of alum by hot water leaching, cooling and filtration, (2) re-dissolution of purified alum by hot water leaching followed by removal of aluminum and sulfate by stepwise precipitation by addition of barium hydroxide. The result of this treatment was a high - purity Cesium hydroxide solution.
- Conversion of the Cesium hydroxide solution to Cesium formate solution by simple addition of formic acid.
- The co-precipitation of iron, arsenic and other species from the leachate using neutralization with limestone was demonstrated.
The overall procedure had three stages: leaching, crystal formation, crystal purification, and Cesium sulfate purification, and the corresponding recoveries of Cesium were 94.7%, 99.9%, and 96.1%, respectively. This gives a total of 90.9% Cesium recovery over the entire process assuming all wash solutions would be recycled with negligible Cesium losses.
The Company is funding ongoing study of Cesium recovery including (1) upgrading of the Taron mineral sample by mild scrubbing and screening, (2) acid leaching with reduced acid concentration, (3) alternative leaching process options. Following these studies, it is expected that the Company will commence a metallurgical pilot plant study to provide final engineering parameters for a feasibility study for Cesium recovery from the Taron target deposit
Table 1 – Typical Taron target deposit Sample Analysis (2009 Drill Program, Hole TAR-09-5)
|ELEMENTS. All values are ppm(wt).|
|OXIDES and Loss on Ignition. All values are wt%.|
Mr. Bill McWilliam, Chairman, Cascadero Copper commented “This initial metallurgical program has conclusively demonstrated that high - quality Cesium formate Cesium Hydroxide solutions may be recovered from the Taron target deposit mineralization”. “Cesium formate is in high - demand in the oil and gas drilling sector as Cesium formate solution has a very - high density (2.30 g/cm3). Cesium formate also has several other important properties for drilling and completion of down hole operations. It is considered the premier product of alkaline brines and all other drilling fluids.”
“It is expected that the ongoing UBC metallurgical program will increase the efficiency of the process and decrease costs. In addition, I these metallurgical results may be an historic moment in geological deposit understanding, mineralogy, due to impressive persistence and excellence of the UBC metallurgical team. I understand that the recovery of Cesium from an epithermal sediment hosted polymetallic mineral source other than Pollucite, is a first.”
“I congratulate Cascadero’s staff, consultants, advisers and investors for their support and patience to the finish line.”
Dr. David Dreisinger, Ph.D, P.Eng., is the Qualified Person for the purposes of NI 43-101. Dr. Dreisinger has reviewed and approved the technical disclosure contained in this news release as applicable. The Company will endeavor to meet high-standards of integrity, transparency, and consistency in reporting technical content, including geological and assay data.
About the Company:
Cascadero Copper is an integrated mineral exploration and development business, which through its 70% owned subsidiary, Cascadero Minerals Corp Canada (CMC) and its partner Regberg Ltd. (Singapore) manage and finance CMC as a 70/30 Joint Venture. The Company holds exploration rights to 27 tenements in north western Argentina. Twenty-two of the tenements are organized into four core areas: Taron; Taca Taca; Santa Rosa; El Oculto and five of the tenements are stand-alone-exploration opportunities.
The Company’s commodity focus includes: Cesium, Rubidium, Thallium, Gold, Silver, Lead, Copper, Zinc, Tellurium and Tin. There are several deposit types and most contain precious metals, such as gold and silver. The tenements are mostly 100% owned by CMC and were generated from grass roots prospecting 2004 to 2014. In 2005, the Company had seventy-five tenements covering 203,000 hectares. The current portfolio is a rendering of those tenements. There are no underlying agreements on any of the tenements but some, including Taron, are subject to a 1% NSR and none is subject to Joint Venture or Buy - Sell agreements.
The Company has offices in North Vancouver, BC and Salta City in the province of Salta, Republic of Argentina.
Office = 604.924.5504
Cell = 604-999-0391
“Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.”