Hole effect model, usually means your deposit has alternating high and low grade zones. Sorry I'm not
familiar with the geology of this deposit but examples
of this could be pods of high grade spaced apart from
each other with waste or low grade halos between
them. If only the high grade zones are economic you may want to seperate them out and model them seperately.


Digby
www.users.on.net/~digbym






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