| 单词 | alkali amphibole |
| 释义 | > as lemmasalkali amphibole c. Geology. Designating minerals and rocks in which alkali metals (esp. sodium and potassium), or minerals containing them, are significant components, as alkali amphibole, alkali granite, etc. See also alkali basalt n., alkali feldspar n. at Compounds 3. ΚΠ 1896 Science 24 July 119/1 Petrographic study of the prophyry [sic] shows it to belong to the alkali granite-syenite series. 1920 A. Holmes Nomencl. Petrol. 116 Hedrumite, a leucocratic variety of alkali-syenite containing accessory nepheline. 1963 W. A. Deer et al. Rock-forming Minerals II. 369 Bilgrami (1955) considered it appropriate to classify the manganese-rich alkali amphibole juddite..with the richterite group. 1985 R. Thorpe & G. Brown Field Descr. Igneous Rocks ix. 125 Around the vents are alkali-enriched metasomatic rocks containing alkali feldspar and alkali pyroxenes replacing the original mineralogy. 2004 N. Eastaugh et al. Pigment Compend. 12/1 The alkali amphiboles show a wider variety of colours, often being blue or blue-green but also red, brown, yellow and green. < as lemmas |
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