Four alteration zones are recognized in both study wells, and include an unaltered zone, smectite zone, illite/chlorite zone and illite/chlorite/epidote zone.
Fjögur ummyndunarbelti voru greind í borholunum tveimur: óummyndað belti, smektítbelti, illít-klórítbelti og illít-klórít-epidótbelti.