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dunite |
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duniteYellowish green to green igneous rock composed almost entirely of olivine. Chromite and magnetite also occur in dunite, as do spinel, ilmenite, pyrrhotite, and platinum in some cases. Dunites may be a source of chromium. Places of occurrence include Dun Mtn., New Zealand (the source of its name), South Africa, and Sweden. dunite [′dü‚nīt] (petrology) An ultrabasic rock consisting almost solely of a magnesium-rich olivine with some chromite and picotite; an important source of chromium. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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Olivine occurs in an ultra-basic igneous rock called dunite. The alluvial deposits on Dime Creek are composed of mostly volcanic andesite and basalt sand and gravel with occasional cobbles of intrusive olivine dunite. E[acute accent]Mooihoek Platinum Pipe Deposit contains the remnants of a platinum-rich dunite pipe of which platinum makes up 97. |
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