Just a quick update. It was reported to me that my >2% volume wasn't accurately averaging/estimating the grade for this zone.
Thank you to Anon who alerted me about this.
It seems to be a 'feature' in Leapfrog Geo that for the highest grade grade-shell, it doesn't average the grades of the intervals occurring within the grade-shell, but uses the value I enter for the grade shell, in this case 2%.
What I have done is created an additional grade shell at 4% and here is the result:
It does have a big effect on the >2% mineralization. We have the same tonnes, but I think we have more accurate grades for the various zones.
Thanks to the kind person who pointed that out.