Figure 4. Chondrite-normalized REE element patterns for the (a) MORB-, (b) OIB- and (c) SSZ-type basaltic lavas from the Tethyan suture zone in western Turkey. Chondrite normalizing values are from Boynton (1984). Average N-MORB and OIB compositions are shown by dark and grey heavy lines respectively. N-MORB and OIB compositions are from Sun & McDonough (1989).