Here's an excellent report that was released not to long ago, detailing the number of 1million and plus oz Au deposits world wide.
It details the largest deposits of developed and undeveloped deposits world wide, as well as the top developed and undeveloped deposits in Canada and the United States.
One thing to consider here is that Porphyry deposits were only marginally included; when the authors concluded that the amount of gold was to high to look past. There may very be many other 1 million + oz Au porphyry deposits around the world, which were not included.
I hope to do a write up on porphyry deposits in the near future.
The report also shows the top Gold containing countries. Its nice to see Canada and the States up there.