When you think of it the companies have much in common and have already been sharing/co-operating on use of drilling equipement.
They both seem to have similar goals in looking for buy-out following determination of quantity of the resource
If in fact the assay results confirm a continuation of a vein structure then it would be a defendable course of action to co-ordinate the news releases. This type of thing would be run by thier legal departments who are fully conversant with the nuances of Stock Exchange Rulings.
Onward and Upwards