nimbus silver mine, page-6

"Ed" - read carefully eg last ASX ann.
1/ ..."We have reviewed the recent Boorara 507,000 ounce gold resource estimate and believe it has been potentially excessively diluted with waste. Manual wire framing of gold mineralisation is now being completed coupled with evaluating alternative resource estimation methods. MacPhersons will be estimating a revised Mineral Resource Estimate expected to be completed by August or September 2018 (completion of drilling) that will include the current 20,000 metre RC program and be used in future open pit optimisations...."
2/ ..."Boorara Trial Open Pit;  Grade control drilling and mill processing reported a grade overcall in November 2016 from the 20 metre deep Boorara trial open pit at the Southern Stockwork deposit, when compared with the overall resource grade for that deposit.  The Southern Stockwork deposit wire framed resource grade at 0.4 g/t cutoff was 1.20 g/t (see ASX release 25th January 2017).  Close spaced 4m x 4m vertical RC grade control pattern resulted in defining a resource of 28,673 t at 2.00 g/t and a diluted reserve of 30,572 t at 1.78 g/t. "
Cheers/V