英语词汇“trondhjemite”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	trondhjemite
释义	trondhjemite Petrogr.\|ˈtrɒndheɪmaɪt\| [ad. G. trondhjemit (V. M. Goldschmidt 1916, in Skrifter udgivna af Vidensk. i Christiania (Matem.-Naturv. Klasse) No. 2. 77), f. Trondhjem (now Trondheim), name of a city in western Norway: see -ite¹.] Any leucocratic tonalite, esp. one in which the plagioclase is oligoclase. 1922Jrnl. Geol. XXX. 406 The acid phase is represented by ‘trondhjemite’ (new name) which Kjerulf calls an oligoclase-granite, and which might as well be characterized as a granodiorite.1978Nature 12 Oct. 538/2 The metabasaltic sequences may be of considerable thickness and in many areas are associated with intrusive cumulate gabbros, trondhjemites and minor developments of serpentinised peridotites.1979F. Barker Trondhjemites, Dacites, & Related Rocks i. 1 The author suggests that the IUGS definition of trondhjemite as leucotonalite be followed, except that andesine-bearing leucotonalite be termed calcic trondhjemite, and that albite-bearing leucotonalite, as well as the oligoclase variety, be termed trondhjemite.
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