Malbex Reports 80% Gold Recoveries from Column Testing of Rojo Grande Mineralization; Shares Rise 22%

By Midnight Trader,  August 17, 2012, 02:57:43 PM EDT

Malbex Resources Inc. (MBG.V) this week reported the final results from column leach testing of Rojo Grande mineralization from the Company's Del Carmen Norte gold-silver (Au-Ag) project in San Juan province, Argentina. Average gold recoveries of nearly 80% in static columns show there is good potential to use heap leach cyanidation to process Rojo Grande mineralization, Malbex said.

Seven composite samples weighing approximately 200 kilograms each and representative of grade, mineralogical and spatial variations within the inferred resource at Rojo Grande were subjected to individual column testing at McClelland Laboratories, Inc. in Sparks, Nevada. Two feed sizes (12.5 mm (half-inch) and 6.3 mm (quarter-inch)) were tested for each composite. Average recoveries for all column tests were 79.8% for gold and 35.7% for silver. Testing indicates that the composites are amenable to simulated heap leach cyanidation and show limited sensitivity to crush size (12.5 mm composites average 78.6% gold recovery with 6.3 mm composites averaging 80.9% gold). The column tests show higher gold recoveries for quartz-alunite hosted mineralization (average 85.3%) compared to silicified material (average 75.6%).

Gold recovery rates are reported as "moderate to fairly rapid".

Close to 780,000 shares have been traded so far.




The views and opinions expressed herein are the views and opinions of the author and do not necessarily reflect those of The NASDAQ OMX Group, Inc.


This article appears in: Investing, Commodities

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