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Dunite - Wikipedia, the free encyclopedia
Dunite (pronounced /ˈduːnaɪt/ or ) is an igneous, plutonic rock, of ultramafic composition, with coarse-grained or phaneritic texture. The mineral assemblage is greater than 90% olivine, with m...
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Dunite granular, green igneous rock composed of coarse grains of olivine, is the source of the world's supply of chromium. It weathers to a dun brown color, as at Mount Dun, in New Zealand, its namesake. Some dunites are rich in chromite, magnetite, ilmenite, or pyrrhotite;
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OLIVINE and PERIDOTE ; HARZBURGITE and DUNITE ... Dunite:; A rock made entirely of olivine. ... In harzburgite and dunite, the olivine is brown, greenish brown to black and has a more glassy texture than the pyroxene. Accessory minerals include magnetite, chromite, and serpentine minerals.It may contain traces of plagioclase.
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Dunite is a plutonic igneous rock consisting almost entirely of olivine. ... Dunite can weather to the metamorphic rocks serpentinite and soapstone. ... See Steve's blog; Ramblings ; On The Future ; Of Humanity;; You can make a difference! Help President Obama, NASA, and the people of Earth. See the;
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slide changes every 10 seconds ... dunite.jpg...
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Dunite is a deep-seated, heavy rock that consists almost entirely of the mineral olivine. Big bodies of dunite are quite rare. Your basic rock-shop specimens are usually dunite xenoliths, little lumps carried up within a basalt lava flow from Arizona.
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Dunite formation processes in highly depleted peridotites are discussed based upon a detailed study of the Iwanaidake peridotite, Hokkaido, Japan, which consists mainly of harzburgite with a small amount of dunite.
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Encyclopedia article about dunite. Information about dunite in the Columbia Encyclopedia, Computer Desktop Encyclopedia, computing dictionary. ... 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...
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USGS Geochemical Reference Standard - Dunite, DTS-2. Page lists certificate of analysis. ... Dunite, Twin Sisters Mountain DTS-2B ... The Twin Sisters dunite is composed of virtually unaltered, coarse grained enstatite bearing dunite with accessory amounts of chromite and chromium diopside (Ragan, D.M., 1963).
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The sediment is unsorted crushed dunite (from a local quarry) that ranges in size from fine sand to clay (a range compatible with our particle size analyzer).
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