单词 | albitite |
释义 | albititen. Geology. A granular rock consisting largely of albite. ΘΚΠ the world > the earth > minerals > types of mineral > silicates > tectosilicate > [noun] > feldspar > plagioclase > albites albite1817 pericline1832 adinole1835 peristerite1843 potass-albite1850 zygadite1861 albitite1896 1896 H. W. Turner in Amer. Geologist 17 380 Some of these dikes are composed of coarsely granular albite only. Such a rock may be called an albitite. 1921 Proc. Acad. Nat. Sci. Philadelphia 73 177 The albitites consist almost entirely of granular white, yellowish or bluish gray, translucent albite. 1999 I. Kostov & R. I. Kostov Crystal Habits Minerals vi. 116 The dodecahedral habits of sphalerite predominate in the Oktyabrsk nepheline syenitic Massif, where it occurs in small pockets of albitites as simple {110} crystals. 2010 Marketwire (Nexis) 29 July The first sample, consisting of fragments of sericitized albitite with a 5% volume of quartz veins, was taken from around a pit dug by orpailleurs, or hand miners. Derivatives ˌalbiˈtitic adj. ΚΠ 1913 J. M. Sobral Contrib. Geol. Nordingrå Region 172 The two magmas have been successively intruded along the same fissure; the younger rock (the basalt) being flanked by the older (albititic) rock. 1955 J. C. Brown & A. K. Dey India's Mineral Wealth (ed. 3) xvii. 636 Intermediate in composition are the albititic jadeitites which grade into the albitites. 2009 Market News Publishing (Nexis) 21 Oct. A thin section from the white pegmatite shows evidence of albititic metasomatism. This entry has been updated (OED Third Edition, September 2012; most recently modified version published online December 2021). < n.1896 |
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