Why not give them a call and ask them yourself if you are really curious? And please tell us what they tell you. We won't ask for proof of your call or call it hearsay.
It is my belief and IMHO that Mercator did not purchase the Emerald Isle Mine, now known as The Chloride Mine, because they felt that The Chloride Mine was/is a huge money pit.
I think that it is safe to assume that Mercator did not attempt to acquire SIRG's Emerald Isle/Chloride mine because they had their hands full with their own fledgling mine. In 2010 the company lost $115 on their own mine. That seems like a fairly plausible reason to me why someone would choose to concentrate on their existing project rather than distracting themselves with new properties. Maybe it was because they only had approximately 10% of the purchase price in cash on hand. Both of these seem like fairly reasonable explanations to me, but if you feel that a more detailed explanation is needed I would suggest that you call Mr David Jan at 778-330-1295.
All of this information is easily verifiable, but I will let you do your own 2 minutes of research to find it yourselves.