| 单词 | ophitic |
| 释义 | ophitic, a.1 Min.|əʊˈfɪtɪk|
[f. ophite n.1 + -ic.]
Of the nature of ophite; serpentine; used of the structure of certain rocks in which crystals of feldspar are interposed between plates of augite. By some writers restricted to textures in which augite predominates and the feldspar laths do not in general touch each other.
1875G. H. Kinahan in Proc. R. Irish Acad. II. 118 The passage-rock..may be called ophitic hornblende-rock or amphibolic-ophyte, according to the mineral predominating. 1881Jrnl. Chem. Soc. XL. 697 The ophitic rocks of the Pyrenees are characterised by the development of microliths of triclinic felspar embedded in elongated layers of pyroxene. Ibid., The labradoric ophite..showed the passage from trachytoidal to ophitic structure. 1889Pall Mall G. 20 Aug. 3/1 A boulder..composed of sub-ophitic dolerites. 1897Geikie Anc. Volcanoes Gt. Brit. I. 21 A specially characteristic feature of many basic rocks is..what is termed an ophitic structure. 1970K. C. Jackson Textbk. Lithology v. 300 Diabasic texture... Composed of tabular plagioclase with smaller interstitial granular pyroxene crystals. Ophitic texture... Small tabular plagioclase embedded in larger anhedral pyroxene crystals. 1973G. J. H. McCall Meteorites xiii. 174 (heading) Eucrite showing ophitic intergrowth of narrow plagioclase laths.
Hence oˈphitically adv., with an ophitic texture.
1908Q. Jrnl. Geol. Soc. LXIV. 491 [The biotite] is moulded ophitically on these minerals. 1971Nature 3 Dec. 265/1 The plagioclase-phyric basalts contain abundant pyroxene.., most of which has crystallized ophitically with the small calcic plagioclase laths. |
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