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Gold/Mining/Energy : Gold and Silver Juniors, Mid-tiers and Producers
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To: Cactus Jack who wrote (64736)4/9/2009 11:04:05 AM
From: Tommaso  Read Replies (1) of 78416
 
Thanks. How good is 2 g/t as an ore grade?

Here's something I found:

Gold ore grades may be as little as 0.5 g/1000 kg (0.5 ppm) on average in large easily mined deposits, typical ore grades in open-pit mines are 1 - 5 g/1000 kg (1-5 ppm), ore grades in underground or hard rock mines are usually at least 3 g/1000 kg (3 ppm) on average. Ore grades of 30 g/1000 kg (30 ppm) are usually needed before gold will be visible to the naked eye, therefore even in gold mines you will often not see any gold.
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