单词 | granodiorite |
释义 | granodioriten. Geology. Any of the plutonic igneous rocks intermediate in composition between true granite and quartz-diorite, which are similar in appearance to granite but are usually darker in colour; esp. one in which there is at least twice as much plagioclase as alkali feldspar. 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 1893 W. Lindgren in Amer. Jrnl. Sci. 46 203 On the Survey maps of the Gold Belt of the Sierra Nevada, of which district Mr G. F. Becker is geologist in charge, it has therefore been determined to indicate this rock as granodiorite, which term it is hoped will find general acceptance. 1911 Encycl. Brit. XXVII. 1/1 Grano-diorite..has been very generally adopted in America for rocks which are intermediate in character between the granites and the diorites. 1932 A. Johannsen Descr. Petrogr. Igneous Rocks II. 323 Granodiorites occur as intrusive bodies, in the same manner as granites, and often form huge masses. 1961 Bull. Board Celtic Stud. 19 167 A magnificent implement [sc. a Neolithic axe-head] made of an augite granodiorite, almost certainly of Pembrokeshire origin. 1965 G. J. Williams Econ. Geol. N.Z. xiv. 216/1 The central granite consists of types ranging from pink, generally porphyritic, alkali granites to the more common white to grey biotite calc-alkali granite, adamellite or granodiorite. Derivatives granodioritic adj. ΚΠ 1925 H. H. Read et al. Geol. Golspie 34 The Rogart granodioritic magma. This entry has not yet been fully updated (first published 1933; most recently modified version published online June 2018). < n.1893 |
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