You are correct when you say that they need to do drilling for...

You are correct when you say that they need to do drilling for JORC.

However, they already have these zones covered under their previous JORC resource statements. The additional drill holes were probably designed to provide much higher confidence (Indicated to Measured etc) in areas where the drill spacing, or previous surrounding drill intercepts required further confirmation (or drilling support).

I don't believe that you can extend this high grade pod that much as there is already much drilling intensity around it. There could only be slight additions if any, as there is always the chance that you can make losses as well as gains and these tend to balance out. You don't need to have Measured Resources to convert to reserves. Indicated Resources are sufficient for Probable Reserves (unlike Proved Reserves from Indicated.

Some deposits can never get into the Measured category due to geological variations within the deposit itself and the required drill intensity for this conversion.