trondhjemiten.

/ˈtrɒndheɪmʌɪt/

Etymology: < German trondhjemit (V. M. Goldschmidt 1916, in Skrifter udgivna af Vidensk. i Christiania (Matem.-Naturv. Klasse) No. 2. 77), < Trondhjem (now Trondheim ), name of a city in western Norway: see -ite suffix¹.

Geology.

Any leucocratic tonalite, esp. one in which the plagioclase is oligoclase.

ΘΚΠ

the world > the earth > structure of the earth > constituent materials > rock > igneous rock > [noun] > plutonic rocks > other plutonics

dunite1859

napoleonite1866

corsite1876

tonalite1879

trout-stone1892

granodiorite1893

adamellite1896

syenodiorite1917

microdiorite1920

trondhjemite1922

1922 Jrnl. Geol. (Chicago) 30 406 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.

1978 Nature 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.

1979 F. 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.

This entry has not yet been fully updated (first published 1986; most recently modified version published online June 2021).

单词	trondhjemite
释义	trondhjemiten. /ˈtrɒndheɪmʌɪt/ Etymology: < German trondhjemit (V. M. Goldschmidt 1916, in Skrifter udgivna af Vidensk. i Christiania (Matem.-Naturv. Klasse) No. 2. 77), < Trondhjem (now Trondheim ), name of a city in western Norway: see -ite suffix¹. Geology. Any leucocratic tonalite, esp. one in which the plagioclase is oligoclase. ΘΚΠ the world > the earth > structure of the earth > constituent materials > rock > igneous rock > [noun] > plutonic rocks > other plutonics dunite1859 napoleonite1866 corsite1876 tonalite1879 trout-stone1892 granodiorite1893 adamellite1896 syenodiorite1917 microdiorite1920 trondhjemite1922 1922 Jrnl. Geol. (Chicago) 30 406 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. 1978 Nature 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. 1979 F. 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. This entry has not yet been fully updated (first published 1986; most recently modified version published online June 2021). < n.1922
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