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Monday, January 9, 2017

Hermosa - more parlor tricks

I don't know how I missed it, we can also see that not just has the recoveries decreased, but the grade of the concentrate has also had a bit of a haircut:
  • Lead - original = 79%, new and improved = 75% - a 4% difference
  • Zinc - original = 57%, new and improved = 56% - a 1% difference
If you didn't know, just to explain Arizona mining insist on using imperial units (which are fecking retarded) so their resource is in short tons not metric Tonnes.

  • 1 ton = 2000 lbs or 907.18kg
  • 1 tonne = 1000kg or 2204.6 lbs

So, if they were reporting their resource in metric tonnes it would be:

  • Indicated = 28.25 million, beautiful metric tonnes
  • Inferred = 75.07 million metric tonnes
A bit different, and I apologize for not seeing it sooner.

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