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The Jinchuan Ni-Cu-(PGE) deposit is the largest single magmatic Ni deposit in the world. It is hosted by a small ultramafic intrusion in the Longshoushan terrane located in the western part of the North China craton. Phase equilibrium analysis using available whole-rock and mineral chemical data confirms that the parental magma of the intrusion is of high Mg basaltic composition, but the primary magma may have contained up to 18.5 wt percent MgO. The involvement of a long-term enriched subcontinental lithosphere mantle (SCLM) source is inferred from high, negative εNd values (–6 to –12). Small amounts (mostly 5–15%)...

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