MORB Midocean ridge basalt
extracted from MORB source or DMM
OIB Oceanic ridge basalt
extracted from?????
Primitive Mantle (PREMA)
Loihi-Icelandic Type (Primitive HE Mantle)
EM1 (Enriched Mantle=oceanic
sediments?)
EM2 (Enriched Mantle=continental sediments?)
HIMU (high U/Pb=oceanic crust?)
FOZO-C