Nevada King is a paying customer of this website. This article is not intented to be used as unbiased research. I am uneducated, inexperienced, and have a high risk appetite, so this article is likely to be full of mistakes and therefore should not be viewed as financial advice.
This company owns a lot of land in Nevada, including a past-producing mine and other prospective targets. Find out more about this company in this interview.
Nevada King just completed a cyanide solubility testing program for the Atlanta project.
The company sent in almost 1000 samples – coming from within the historic pit, but also up to 560m outside of the pit – to be tested, as it was thought the rocks didn’t respond well to cyanide. Turns out they do, and the gold is soluble in cyanide under certain conditions.
Collected samples ranged in depth between 0m and 197m.
Higher-grade samples (above 1.5g/t Au) showed higher solubility.
The weighted-average gold solubility across the 986 samples is 86.7%. This is rather high. Only 2% of the samples had an average solubility under 50%. That’s good.
The results demonstrate that gold mineralization at Atlanta is not refractory due to sulfides or organic carbon or encapsulated by silica at fine particle size. The last part is important. At fine particle sizes. This might mean the ore needs to be crushed before potentially leached. I don’t know. I’ll ask Collin, their CEO, when I talk to him soon.
Further testing also found higher than anticipated sulfur content. More testing will be done soon to determine the best method to remove the sulfur contained in barite and gypsum sulfates to obtain a more representative total sulfur analysis.
Though all of this doesn’t say anything about gold recoverability, it is encouraging to know that there are no metallurgical issues preventing gold solubility at the Atlanta project.
Because of these results, the company will now expand its solubility testing to include pulps from historical drill holes to determine gold solubilities within the Gustavson 2020 resource zone. This will go together with a drill program that is meant to provide samples for leach testing.
Read the full news release here.
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