Two assertions I’ve seen:
The Wits (according to wiki) has accounted for half the gold mined worldwide to date.
The Pilbara has identical geology, having been part of the same ancient continent billions of years ago.

Issued a buy signal … five years ago.

http://www.321gold.com/editorials/moriarty/moriarty081512.html

“In eleven years of running 321gold, I have never come across a company that had the potential of Novo Resources. If you subtract the cash and value today of the shares and warrants the company owns, you are getting 700 square miles of a Wits model deposit for about $5 million. It doesn’t get any better than that. It is easily a ten-bagger. It could be a 100-bagger. It’s going to be big. What’s the value of 700 square miles of the Wits?”