I believe it can be fixed. There are others on here that can give better advice though. My guess would be to carefully clean as much between the two layers as best you can without causing more separation. Then carefully squeeze some CA (super) glue into the area using a syringe. Clamp it together and let it sit for a good 24 hours. I would wait 2-3 days before stressing the glue joint. But as I said before, don't just go by my advice, see what the others are suggesting too.