Recoveries Averaging 88% At Dark Star Oxide Gold Deposit
VANCOUVER, BC - Gold Standard Ventures Corp. reported positive metallurgical results from continuing work designed to determine the processing characteristics of the Dark Star oxide gold deposit, on its 100%-owned/controlled Railroad Project in Nevada’s Carlin Trend. Bottle roll recoveries from -10 mesh size material averaged 88% for Dark Star oxide and transition materials. Results indicate this material is likely to support heap leach processing.
Bottle roll testing for cyanide solubility of Dark Star core samples was completed by Kappes Cassiday and Associates of Reno, Nevada, under the direction of Gary Simmons, consulting metallurgical engineer. Bottle rolls were completed on drill core samples at both -10 mesh and -200 mesh size fractions. The results will be combined with column leach testing currently in progress to predict gold recoveries in a cyanide heap leach operation.
At Dark Star, a total of 62 samples representative of the gold deposit were tested using bottle rolls at the two different size fractions. Oxide and transitional material thought to be suitable for heap leaching was subjected to testing to determine ranges of gold recovery. At Dark Star, gold recoveries for oxide and transitional in the coarse -10 mesh bottle rolls of material ranged from 60-98%, with an average gold recovery of 88%. In the finer -200 mesh bottle rolls gold recovery ranged from 75-98%, with an average gold recovery of 91%.
According to Mr. Simmons, “Data from metallurgical bottle roll testing to date at Dark Star point to high gold leach extraction from oxidized materials and suggest that simple heap leaching of crushed and/or run of mine material may be the preferred process option at Dark Star.”
Jonathan Awde, CEO and Director said, “This is an important further step in determining the economic potential of the high grade near surface Dark Star gold deposit. Not only are the initial recoveries very encouraging but also the amount of preparatory grinding and reagent consumption required appear to be very manageable. Our ongoing aim is to complete a PEA this year that confirms our belief that the Dark Star deposit can become a low cost gold producer.”