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Norite |
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norite [′nȯ‚rīt]
(petrology) A coarse-grained plutonic rock composed principally of basic plagioclase with orthopyroxene (hypersthene) as the dominant mafic material. Also known as hypersthenfels. Norite (Norwegian norit, from Norge, “Norway”), a rock of basic composition in the gabbro group. It differs from gabbro in that it contains a rhombic pyroxene, usually bronzite but sometimes enstatite and hypersthene. When both pyroxenes are present the rock is called gabbro-norite. The remaining minerals are those in gabbro. Plagioclase with more than 50 percent anorthite predominates; olivine is often present; and various ore minerals such as magnetite, titanmagnetite, and sulfides occur as insignificant impurities. Norite typically has a low SiO2 content (45–55 percent), significant amounts of Mg and Ca (10–20 percent), and a negligible alkali content (rarely more than 2–3 percent). It is used as a building material. 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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No references found | mode=greenroom&mode2=full&caseid=992&topic=T01 norite undulator vicodin http://www. Please'; (27) Seimo nary Alesionka, norite oponuoti? 07 g/t Pd - Ore hosted in a norite body within a large unexplored anorthosite complex. |
Norite |
Noril'sk Norilsk Norilsk Norilsk Mining and Metallurgical Combine Norilsk Ore Region Norimode Norimon Norin, Sergei Norin, Sergei Konstantinovich Norinaga Mootori Norinaga Motoori Norinaga Motori Norinaga Motôri Norinco Norinyl Norinyl Norio Oga Norio Ohga Norio Ooga Norio, Ohga NORIP noris noris Norisoprenoids Norisoprenoids Norisoprenoids Norit Norit Noritate Noritate Norite noriticnoritic Norito Norito Noritsu America Corporation Norium Norium Norium NORIV Nork Nork Norland Norlander norlandism NORLC Norlestrin norleucine norleucine Norleucine Boronic Acid NORLI Norline norloline NORLSAR NORLUN NORLUN Instability Trough Nõrlund mean Nõrlund mean Norlutin norm norm | |||||||
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