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