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pyroxenite |
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pyroxeniteDark medium- to coarse-grained igneous rock that consists chiefly of pyroxene. Accessory minerals include hornblende, biotite, or olivine. Pyroxenites are not abundant. pyroxenite [pə′räk·sə‚nīt] (petrology) A heavy, dark-colored, phaneritic igneous rock composed largely of pyroxene with smaller amounts of olivine and hornblende, and formed by crystallization of gabbroic magma. 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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6% Ni, is hosted by a small, late-kinematic pluton of pyroxenite that crosscuts diatexites of sedimentary origin. Tatsumi (2000) showed that EM1 Sr-Nd-Pb isotopic compositions are consistent with melting Archean pyroxenite from the subcontinental lithosphere, and the [sup. MR FPP indicates Feldspathic Pegmatoidal Pyroxenite on the Merensky Reef and MR CR indicates Merensky Reef Contact Reef. |
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