http://www.agoracom.com/ir/sagegold/messages/628124#message

One of the posters yesterday gave this link. It did provide a lot of info. One of the  most notable to me was stated. "The wider the vein at surface the greater the likelyhood of minerals at depth". and I believe they even said the more likely it would be of higher grade also. Don' qoute me on that last sentence , I will have to go back and read it again.

I know this doesn't give you a percentage but it sure gave me a lift as I recall our veins were pretty wide.