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单词 micropegmatite
释义

micropegmatiten.

Brit. /ˌmʌɪkrə(ʊ)ˈpɛɡmətʌɪt/, U.S. /ˌmaɪkroʊˈpɛɡməˌtaɪt/
Origin: Formed within English, by compounding; modelled on a French lexical item. Etymons: micro- comb. form, pegmatite n.
Etymology: < micro- comb. form + pegmatite n., after French micro-pegmatite (A. Michel-Lévy 1875, in Bull. de la Soc. Géol. de France 3 206). Compare slightly earlier micropegmatitic adj.
Geology.
Any rock with a micropegmatitic (micrographic) structure.
ΚΠ
1886 Amer. Naturalist 20 641 The most highly crystalline member of the former is a ‘pale pink-grey pegmatite’, passing through a well-defined graphic granite into a micropegmatite form.
1888 J. J. H. Teall Brit. Petrogr. 30 Graphic granite and..its microscopic equivalent, generally termed micro-pegmatite.
1895 A. Harker Petrol. vii. 91 When the intergrowth is on a relatively coarse scale, it is often rude and irregular, but the finer-textured micropegmatite shews great regularity and often a definite arrangement.
1965 Philos. Trans. (Royal Soc.) A. 257 301 The rest is micropegmatite, augite, [etc.].
1992 Indian Minerals 46 249 Locally..intergrowth of K-feldspar and quartz is present and this feature is similar to micropegmatite described by Spry (1969).
This entry has been updated (OED Third Edition, December 2001; most recently modified version published online March 2022).
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n.1886
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