Don't worry about "only" 1.6 km. I think that's just the distance from the property line to SGX's exploration at the Golden Extension. It would be ridiculous to assume that the vein stops exactly there. However, they can't quote figures for a longer Extension if no exploration whatsoever has been done yet to prove it.

That's not a criticism - heck, SGX just got there! Now they can take the next steps.