Abstract
THE explanation of why partial fusion of mantle peridotite sometimes yields basalts, sometimes kimberlites and sometimes carbonatites is given by the phase relationships in the system CaO–MgO–SiO2–CO2. The key is the intersection of a sub-solidus carbonation reaction with the solidus, which introduces carbonates as primary minerals alongside silicates on the surface of the liquidus.
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WYLLIE, P., HUANG, WL. Influence of mantle CO2 in the generation of carbonatites and kimberlites. Nature 257, 297–299 (1975). https://doi.org/10.1038/257297a0
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DOI: https://doi.org/10.1038/257297a0
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