Here are the benefits of Nifty
The cut of grade could potentially go lower and increase resources as the heap leaching can potentially take over 90% of the material in the ground. Take a look at some of the major operations overseas where their current resource being mined is less than 0.50%. For example Codelco the worlds largest copper mine was 0.46% until the new expansion plan gave them 0.59% with a $1.4 billion expansion program.
https://www.mining.com/codelco-breaks-ground-at-1-4bn-expansion-of-salvador-copper-mine/
Here is a diagram of an SX-EW operation
Ann: Quarterly Activities Report, page-14
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