article below states that the marker G2-L497 was created in central Europe and that 80% of G in the alps is from this marker.
otzi is G-L91 and is only 1% of the G in the alps.
There is also stated 18% of this marker L497 in Ibiza
http://www.sciencedirect.com/science/article/pii/S1872497313001361
very strange how I can see the full article at work but not at home........I will link it tomorrow