Thanks Al, you almost always get a thumbs up vote from me. I think you posted this before or at least it seems I have read this before and it is great information. I still don't seem to have an answer as to whats going on in the center of the ring. Is this where there is evidence for a "giant"parent magma or "large" mafic magma intrusions? Is this region not likely to be well mineralized only at much deeper depths? Thanks again for your posts and thoughts. They are much appreciated by most who read this forum. GLTA.                     the deputy