pyroxenite

py·rox·e·nite

P0690700 (pī-rŏk′sə-nīt′)n. An igneous rock consisting chiefly of pyroxenes.

py·rox′e·nit′ic (-nĭt′ĭk) adj.

pyroxenite

(paɪˈrɒksɪˌnaɪt) n (Geological Science) a very dark coarse-grained ultrabasic rock consisting entirely of pyroxene minerals

py•rox•e•nite

(paɪˈrɒk səˌnaɪt, pə-)

n. any rock composed essentially, or in large part, of pyroxene of any kind. [1860–65]

Pyroxenite

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.

Pyroxenite

an ultrabasic rock composed chiefly of one or more pyroxenes. It sometimes contains small admixtures of olivine; more rarely, it contains feldspar and magnetite or titanomagnetite. The type of pyroxene and the ore minerals present in the rock form the basis for determination of the variety of pyroxenite. Thus, rocks containing bronzite are called bronzitites, while those with hypersthene are known as hypersthenites. Pyroxenites containing equal amounts of orthopyroxene and diopside are called websterites. Pyroxenites are composed of 43–53 percent SiO₂, 4–10 percent AI₂O₃, 5–13 percent FeO + F₂O₃, 13–24 percent MgO, and 9–20 percent CaO.

Pyroxenites are found in areas of basic plutons, forming rather extensive belts and zones. They are often associated with alkali rocks and carbonatites, thus producing deposits of many minerals, such as apatite and rare earths. Pyroxenites sometimes occur as titanium-rich iron ores.

单词	pyroxenite
释义	pyroxenite py·rox·e·nite P0690700 (pī-rŏk′sə-nīt′)n. An igneous rock consisting chiefly of pyroxenes. py·rox′e·nit′ic (-nĭt′ĭk) adj. pyroxenite (paɪˈrɒksɪˌnaɪt) n (Geological Science) a very dark coarse-grained ultrabasic rock consisting entirely of pyroxene minerals py•rox•e•nite (paɪˈrɒk səˌnaɪt, pə-) n. any rock composed essentially, or in large part, of pyroxene of any kind. [1860–65] Pyroxenite 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. Pyroxenite an ultrabasic rock composed chiefly of one or more pyroxenes. It sometimes contains small admixtures of olivine; more rarely, it contains feldspar and magnetite or titanomagnetite. The type of pyroxene and the ore minerals present in the rock form the basis for determination of the variety of pyroxenite. Thus, rocks containing bronzite are called bronzitites, while those with hypersthene are known as hypersthenites. Pyroxenites containing equal amounts of orthopyroxene and diopside are called websterites. Pyroxenites are composed of 43–53 percent SiO₂, 4–10 percent AI₂O₃, 5–13 percent FeO + F₂O₃, 13–24 percent MgO, and 9–20 percent CaO. Pyroxenites are found in areas of basic plutons, forming rather extensive belts and zones. They are often associated with alkali rocks and carbonatites, thus producing deposits of many minerals, such as apatite and rare earths. Pyroxenites sometimes occur as titanium-rich iron ores.
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