monzonite

mon·zo·nite

M0409500 (mŏn-zō′nīt′, mŏn′zə-nīt′)n. An igneous rock composed chiefly of plagioclase feldspar and orthoclase, with small amounts of other minerals.

[French, after Mount Monzoni in northeast Italy.]

mon′zo·nit′ic (mŏn′zə-nĭt′ĭk) adj.

monzonite

(ˈmɒnzəˌnaɪt) n (Geological Science) a coarse-grained plutonic igneous rock consisting of equal amounts of plagioclase and orthoclase feldspar, with ferromagnesian minerals[C19: from German, named after Monzoni, Tyrolean mountain where it was found] monzonitic adj

Monzonite

monzonite

[′män·zə‚nīt] (petrology) A phaneritic (visibly crystalline) plutonic rock composed chiefly of sodic plagioclase and alkali feldspar, with subordinate amounts of dark-colored minerals, intermediate between syenite and dorite.

Monzonite

(named after the city of Monzoni, Italy, in the Tirol), crystalline igneous rock consisting of approximately equal amounts of common potash feldspar and lime-soda feldspar (orthoclase and labradorite) and of a ferromagnesian mineral, usually pyroxene. In more acid varieties of monzonite a small amount of quartz may also be present; in more basic kinds there may be olivine. Chemically the group of monzonite rocks occupies an intermediate position between gabbros and syenites (average silica content of 55–65 percent); therefore monzonites are also called gabbro-syenites. Monzonite is a dense large-grained rock that is attractive when polished. It is used as a building material. Monzonites occur in many regions of the USSR—for example, the Ukraine and the Baikal region; abroad they are found in Italy, Norway, and other countries.

单词	monzonite
释义	monzonite mon·zo·nite M0409500 (mŏn-zō′nīt′, mŏn′zə-nīt′)n. An igneous rock composed chiefly of plagioclase feldspar and orthoclase, with small amounts of other minerals. [French, after Mount Monzoni in northeast Italy.] mon′zo·nit′ic (mŏn′zə-nĭt′ĭk) adj. monzonite (ˈmɒnzəˌnaɪt) n (Geological Science) a coarse-grained plutonic igneous rock consisting of equal amounts of plagioclase and orthoclase feldspar, with ferromagnesian minerals[C19: from German, named after Monzoni, Tyrolean mountain where it was found] monzonitic adj Monzonite monzonite [′män·zə‚nīt] (petrology) A phaneritic (visibly crystalline) plutonic rock composed chiefly of sodic plagioclase and alkali feldspar, with subordinate amounts of dark-colored minerals, intermediate between syenite and dorite. Monzonite (named after the city of Monzoni, Italy, in the Tirol), crystalline igneous rock consisting of approximately equal amounts of common potash feldspar and lime-soda feldspar (orthoclase and labradorite) and of a ferromagnesian mineral, usually pyroxene. In more acid varieties of monzonite a small amount of quartz may also be present; in more basic kinds there may be olivine. Chemically the group of monzonite rocks occupies an intermediate position between gabbros and syenites (average silica content of 55–65 percent); therefore monzonites are also called gabbro-syenites. Monzonite is a dense large-grained rock that is attractive when polished. It is used as a building material. Monzonites occur in many regions of the USSR—for example, the Ukraine and the Baikal region; abroad they are found in Italy, Norway, and other countries.
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