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Layered intrusions chromite

Schoenberg et al. (2008) presented the first set of Cr isotope data for rocks and Cr(ll) rich ores. Mantle derived rocks and chromite ores from layered intrusions have a uniform Cr/ Cr isotope ratio very close to the certified Cr standard NIST SRM 979. The Cr isotope composition of hydrothermal lead chromates is substantially heavier (S Cr from 0.6 to 1.0%o) than the rocks from which the chromium was leached. [Pg.83]

Most of the world s chromium reserves occur in large, layered mafic/ultramafic intrusions such as the 2.06 Gyr old Bushveld Complex in the Republic of South Africa, where nearly mono-mineralic layers of chromite appear to result from the mixing of primitive and evolved liquids that... [Pg.1686]

See other pages where Layered intrusions chromite is mentioned: [Pg.24]    [Pg.301]    [Pg.324]    [Pg.325]    [Pg.1686]    [Pg.197]    [Pg.1686]    [Pg.408]   
See also in sourсe #XX -- [ Pg.301 , Pg.324 ]



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Chromite

Layered intrusions

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