Hey, I'm not making this up.  Yes, I have heard rumored mubblings about "different rock compositions", sure.  But this is the PH.D types, who study these things day in and day out, who are seeing this.  And you know Schaft Creek and Galore Creek have been studied to death  by these guys.  Especially Schaft Creek.  And then they collectively stick their necks out in writing up a 43-101 compliant report that front and centre recommends the study of potentially material synergies with Galore.  

Do you have a Ph.D in engineering to legitimately challenge this recommendation?  Does Elmer have a PH.D in engineering to legitimately challenge this recommendation?  No need to answer.  Even if you did I would still go with the 43-101 compliant report recommendation.