| 释义 |
shonkinite Geol.|ˈʃɒŋkɪnaɪt|
[f. Shonkin, Indian name for the Highwood Mountains, Montana + -ite1.]
A dark granular form of syenite consisting largely of augite and orthoclase. Hence shonkiˈnitic a., having the character or consisting of shonkinite.
1895Weed & Pirsson in Bull. Geol. Soc. Amer. VI. 415 For this type of rock, then, we propose the name of shonkinite,..and shonkinite we define as a granular plutonic rock consisting of essential augite and orthoclase, and thereby related to the syenite family. 1900Bull. Geol. Soc. Amer. XI. 395 The relations of the ‘fine grained’ (shonkinitic) syenite to the leucite-porpyhry are uncertain. a1928Peach & Horne Chapters Geol. Scotl. (1930) iv. 112 A discontinuous zone of fine-grained shonkinite and pulaskite. 1943S. J. Shand Eruptive Rocks (ed. 2) xiv. 259 There are no lavas of shonkinitic composition. 1951Turner & Verhoogen Igneous & Metamorphic Petrology viii. 169 The syenite undoubtedly is a differentiate derived from a parent shonkinite magma. 1978S. R. Nockolds et al. Petrology for Students v. 61 Other shonkinites from the Highwood Mountains and from the Bearpaw Mountains, Montana, may have a little plagioclase. |