| 释义 |
syenite Min.|ˈsaɪənaɪt|
Also sienite.
[ad. F. syénite, G. syenit, ad. L. Syēnītēs (lapis), (stone) of Syene, f. Syēnē, Gr. συήνη, a town of upper Egypt, the modern Assouan.]
A crystalline rock allied to granite, mainly composed of hornblende and feldspar, with or without quartz.
1796Kirwan Elem. Min. (ed. 2) I. 341 Sienite. An aggregate of quartz, hornblende, and felspar. 1813Bakewell Introd. Geol. (1815) 116 The transitions by which granite passes into sienite, and the latter into porphyry, trap, and basalt. 1842Sedgwick in Hudson's Guide Lakes (1843) 230 The red syenite of Ennerdale and Buttermere. 1854Hooker Himal. Jrnls. II. xxix. 297 Enormous rounded blocks of syenite.
b. attrib. and Comb.
1832H. T. De la Beche Geol. Man. (ed. 2) 267 Granite and sienite mountains. 1835R. Griffith in Trans. Geol. Soc. (1840) Ser. ii. V. 180 Syenite veins passing through mica slate. 1876E. E. Frewer tr. Verne's Adv. 3 Eng. & 3 Russ. S. Afr. viii. 66 Its [sc. the baobab's] syenite-coloured bark gave it a peculiar appearance. |