| 释义 |
koswite Petrogr.|ˈkɒzwaɪt|
Also kosvite.
[a. F. koswite (Duparc & Pearce 1901, in Compt. Rend. CXXXII. 892), f. the name of the Kosw-inski Mountains, Pawda, in the Middle Urals: see -ite1.]
A coarse-grained peridotite consisting mainly of diopside, olivine, and magnetite. Hence koˈswitic (kosvitic) a.
1901Jrnl. Chem. Soc. LXXX. ii. 398 Associated with olivine-gabbros in the Solimask district, near the source of the Kosswa river, is a new type of basic eruptive rock to which the name koswite is given... As the magnetite decreases in amount and becomes idiomorphic, there is a passage from koswite to ordinary pyroxenite. 1922Mineral. Abstr. I. 327 The mining district around Nikolae-Pavdinsk on the eastern slopes of the northern Urals..consists largely of basic igneous rocks (dunite.., &c., and the local types koswite, tilaite, [etc.]). 1964Doklady Earth Sci. CLIV. 149/2 The exceptionally high contents of volatile components in kosvites (mainly apatite-ore pyroxenites) increase the acidity of the melt. Ibid., In the case of a kosvitic melt, which itself contains a considerable quantity of volatile components. |