MAX Announces Positive Metallurgical Results from Majuba Hill, Nevada, with Leach Recoveries of 84.6% for Copper and 73.4% for Silver

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[{"type":"text","content":"\n\n\n\n\n\nTSX-V: MXR  \nOTC BB: MXROF\nFrankfurt: M1D\n\n\nVANCOUVER, March 4, 2013 /CNW/ - MAX Resource Corp. (TSXV: MXR); (OTCBB: MXROF); (Frankfurt: M1D) has received the preliminary report by John Fox, P.Eng., Consulting\n Metallurgical Engineer  of Laurion Consulting Inc. on the test work\n carried out on samples from it's wholly-owned Majuba Hill copper/silver\n project in Nevada by Inspectorate Exploration & Mining Services in\n Richmond, B.C.\n\n\nA total of fourteen samples of assay sample reject material (crushed to\n 6 mesh) were received at Inspectorate and these were made into a single\n composite weighing 58 kg.   A sub sample was taken for head analysis\n and indicated a grade of 0.62% Cu and 34.6 g/t Ag.\n\n\nA series of bottle roll acid tests were carried out with sulphuric acid\n at pH 1.3 on material running 6 mesh and on material ground to 200\n mesh.   After 14 days of leaching the copper extraction was 81.1% and 84.6%\n respectively. These results indicate the potential for heap leaching copper in a\n relatively short leach cycle, with acid consumption modest at 25kg/t,\n which is in line with expectations.\n\n\nLeach testing was also conducted with thiosulphate over a six hour\n period and 24 hour period.  Leaching was carried out at pH8 on the two\n samples, 6 mesh (un-ground) and 200 mesh.  Silver extraction of 73.4% was achieved on ground material, which was 30% higher than on un-ground material.\n Thiosulphate leaching is normally very rapid; the difference between\n ground and un-ground leach recoveries may disappear over a longer leach\n cycle. Moreover, the silver leach value has not been optimized and it\n is expected that silver recovery may increase with longer leach times.\n\n\nWhile cyanide leaching of sulfuric acid leach residue was also\n undertaken and gave about a 70% recovery, the thiosulphate leach route\n may be preferred because of reduced reagent costs (less lime required\n to neutralize acid to pH8 rather than pH10, and less consumption of\n lixivient as thiosulphate is not consumed leaching excess copper) as\n well as for environmental considerations.\n\n\nClancy Wendt, VP Exploration of MAX, states: \"We are extremely pleased\n by these preliminary results, which demonstrate the feasibility of\n utilizing low-cost heap leach mineral extr...

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