Business
Metallurgical Data Review Shows High Heap Leach Oxide Gold Recoveries at Santa Fe
TORONTO, ON / ACCESSWIRE / January 22, 2024 / Lahontan Gold Corp (TSXV:LG)(OTCQB:LGCXF) (the " C...
About this update from Lahontan Gold Corp.
[{"type":"text","content":"Metallurgical Data Review Shows High Heap Leach Oxide Gold Recoveries at Santa FeTORONTO, ON / ACCESSWIRE / January 22, 2024 / Lahontan Gold Corp (TSXV:LG)(OTCQB:LGCXF) (the \"Company\" or \"Lahontan\"), is pleased to announce the results of a review of metallurgical data for its 26.4 km2 flagship Santa Fe Mine project. The data review was completed by Kappes, Cassiday and Associates (\"KCA\") of Reno, Nevada, a global leader in metallurgical and process consulting. KCA reviewed metallurgical test work on oxide gold and silver mineralization completed by previous operators of the Santa Fe Mine as well as production data. Gold and silver recovery estimates were primarily based upon prior metallurgical test work for the Santa Fe Mine as described below. When recovery estimates of the individual deposits are applied to the Mineral Resource Estimate (\"MRE\") shown in the Santa Fe Mine Technical Report*, it results in weighted project-wide gold recoveries of 74.4% for gold and 29.0% for silver at a ½-inch crush size from oxide mineralization.Recovery estimates were primarily based upon prior metallurgical test work from the Project. This review included considerations from the following quantity of bottle roll and column leach tests: Bottle Roll TestsColumn TestsSanta Fe3225Slab305Calvada East458York153It is typical to apply lab-to-field recovery discounts as a scale up factor when projecting commercial heap leach performance. This is generally a 2% to 5% deduction on the recovery, depending on the amount of available information. For the estimate, a 3% gold recovery deduction was applied to Santa Fe and 5% gold recovery deductions were applied to the other deposits. Five percent silver recovery deductions were applied to all the deposits.Based on the review and applied discounts, the recovery estimates for oxide mineralization are as follows: AuAgSanta Fe79%30%Slab50%20%Calvada East71%13%York60%0%When recovery estimates of the individual deposits are applied to the Mineral Resource Estimate (\"MRE\") shown in the Santa Fe Project Technical Report*, it results in weighted project-wide gold recoveries from oxide mineralization of 74.4% for gold and 29.0% for silver at a ½-inch crush size. Preliminary review of the data indicates little benefit to recovery from crushing finer than this.The data reviewed included the results ...