| 释义 |
monzonite|mɒnˈzəʊnaɪt|
[Named after Mt. Monzoni, Tyrol, its locality: see -ite1.]
1. Min. [F. v. Kobell (monzonit), 1871.] A silicate of aluminium, iron, etc., resembling green hornstone.
18821st App. to 5th ed. Dana 11.
2. Petrogr. [a. F. monzonite (de Lapparent 1864, in Ann. des Mines VI. 259).] A granular igneous rock with a composition intermediate between syenite and diorite, spec. one containing approximately equal amounts of orthoclase and plagioclase.
1895A. Harker Petrol. iii. 44 A special type of augite-syenite is presented by the Triassic intrusions of Monzoni in the southern Tirol (monzonite of authors). 1925Jrnl. Geol. XXXIII. 506 The term ‘monzonite’ properly will apply only to the rocks with a mixture of andesine and orthoclase. 1956E. W. Heinrich Microscopic Petrogr. iii. 53 Monzonites occur as stocks, laccoliths, dikes, sills, and small plutons. 1974Encycl. Brit. Macropædia IX. 222/2 In general appearance and in field relations monzonites resemble granitic rocks; they differ from granites by reason of their lower quartz content.
Hence monzoˈnitic a., (composed) of monzonite or monzonites.
1932F. F. Grout Petrogr. & Petrol. 85 The plagioclase of monzonites crystallized before orthoclase, and the resulting mixture of euhedral and anhedral crystals is the typical ‘monzonitic’ texture. 1936A. Johannsen Descr. Petrogr. Igneous Rocks III. 96 The relations between the orthoclase rocks, the plagioclase rocks, and the monzonitic series. 1974W. C. Luth in H. Sørensen Alkaline Rocks vii. 514/1 The greatest effects, in terms of producing alkaline magmas would be expected of dioritic, monzonitic and andesitic magmas. |