Hey Rinky,
Just to put a perspective on how much room 100 million ounces of gold would take up in that dump truck, then look at how big our biggest anomaly is;
http://money.howstuffworks.com/question213.htm
I think that if we have 100 million ounces of gold you could probably fit it all in that dumptruck. When you think of the size of the anomaly 1.8 km x 1.3 km x 1.7 km, you could fit many dump trucks in that area.
This is just for fun, but it shows how easily something of great value could be hidden in the anomaly.