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charnockite |
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charnockite [′chär·nə‚kīt] (petrology) Any of various faintly foliated, nearly massive varieties of quartzofeldspathic rocks containing hypersthene. 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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The NESP is dominated by foliated plutonic rocks consisting of tonalite-trondhjemite (40%), granite (20%), granodiorite (15%) and enderbite, along with subordinate opdalite, charnockite and mangerite (15%). This assemblage is similar to the highland/Southwestern Complex of rocks of Sri Lanka (which consist of granulite-facies metamorphic rocks such as garnetiferous biotite gneisses, garnet-sillimanite-biotite gneisses, calc-silicate gneisses, amphibolite and especially calciphye, charnockite and cordierite bearing gneisses), that have produced some of the world's largest alluvial gemstone deposits. |
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