Business
Rathdowney completes preliminary metallurgical testwork for Olza Zinc-Lead project — Excellent results exceed expectations, returning high recoveries & concentrate grades
VANCOUVER , June 18, 2013 /CNW/ - Rathdowney Resources Ltd. ("Rathdowney" or the "Compan...
About this update from Rathdowney Resources Ltd.
[{"type":"text","content":"\n\n\nVANCOUVER, June 18, 2013 /CNW/ - Rathdowney Resources Ltd. (\"Rathdowney\"\n or the \"Company\") (TSXV: RTH) announces that preliminary metallurgical\n testing of mineralization from its Project Olza has been completed and\n has confirmed the initial excellent metallurgical results reported in\n the Company's March 12, 2013 news release.  Rathdowney's Olza\n Zinc-Lead-Silver Project is located 70 km northwest of Krakow in\n southern Poland.\n\n\nThe following excellent results were confirmed on the bulk composite\n tested:\n\n\nZinc - a projected zinc recovery of 92% to a 58% zinc concentrate. The\n zinc concentrate was very low in iron, assaying 0.4% Fe, and its\n magnesium content was 1.7% MgO.\n\n\nSilver - a zinc concentrate assay of 179 g/t Ag, representing 83%\n recovery of silver to the zinc concentrate.\n\n\nLead - a projected lead recovery of 90% or better to a lead concentrate\n assaying 70% Pb. The actual lock-cycle result was 87% lead recovery to\n a 79% lead concentrate.*\n\n\n* Reducing the lead concentrate grade closer to a typical 70% Pb grade\n would increase lead recovery to lead concentrate to 90% as quantified\n from lead grade/recovery curves. The lead concentrate contained 55 g/t\n Ag, representing 4% distribution of silver to the lead concentrate.\n\n\nThe preliminary test program was carried out at SGS Mineral Services UK\n Ltd.'s test laboratory near Truro, Cornwall, UK under the direction of\n Melis Engineering Ltd. of Saskatoon, Canada.   A bulk composite sample\n was prepared representing the Olza mineralization styles in proportion\n to their relative abundance in the area of the initial mineral resource\n estimate announced in September 2012 (21.2 Mt of inferred resources\n grading 7.42% Zn+Pb at a 2.0% Zn cutoff1). Sulphides present in the sample include sphalerite, galena and\n marcasite. The average head grade of the test composite was 6.2% Zn and\n 1.4% Pb for a combined head grade of 7.6% Zn+Pb with 19 g/t Ag.  These\n zinc and lead contents are comparable to the September 2012 mineral\n resource.\n\n\nOpen cycle batch flotation tests previously completed and reported in\n March 2013 on a bulk composite representing the Olza mineralization\n determined that optimum metallurgy could be obtained using standard\n zinc and lead flotation conditions. Based on these results,...