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Albitite |
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albitite [′al·bə‚tīt]
(petrology) A porphyritic dike rock that is coarse-grained and composed almost wholly of albite; common accessory minerals are muscovite, garnet, apatite, quartz, and opaque oxides. Albitite a veined crystal-granular mineral consisting mainly of albite, sometimes with an admixture of quartz, muscovite, garnet, and acmite. Albitite can take the form of hydrothermically metasomatic formations linked with alkaline intrusions (in the Khibiny Mountains), with iron-ore formations (in the Ukraine), with gold-ore diorites (in the Ural Mountains and in California), or with ultrabasic rocks (in the Urals). Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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