| 释义 |
myrmekite Petrogr.|ˈmɜːmɪkaɪt|
[ad. G. myrmekit (J. J. Sederholm 1897, in Bull. de la Commission géol. de la Finlande I. vi. 113), f. Gr. µυρµηκ-ιά anthill, wart + -it -ite1.]
An intergrowth of plagioclase with drops or wormlike forms of quartz.
1916Bull. de la Commission géol. de la Finlande IX. xlviii. 1 The intergrowth of plagioclase and ‘vermicular’ quartz..I have called myrmekite. Ibid., I prefer to write myrmekite, as analogous to poikilite etc., instead of myrmecite. 1926H. H. Read et al. Geol. Strath Oykell & Lower Loch Shin (Mem. Geol. Surv. Scot.) vi. 154 In slice..the pinkish medium-grained rock is seen to be composed of quartz, oligoclase, and myrmekite. 1967Mineral Mag. XXXVI. 491 Myrmekite and the other vermicular textures all appear to lack any specific crystallographic or lattice co-relationship between the vermicular and host mineral.
Hence myrmeˈkitic a., of the nature of or containing myrmekite; ˌmyrmekitiˈzation, conversion into myrmekite; a myrmekitic state.
1916Bull. de la Commission géol. de la Finlande IX. xlviii. 120 Myrmekitic intergrowths may occasionally originate like the minerals crystallising in a molten magma, not as crystalloblastic minerals. Ibid. 118 The myrmekitization and the formation of the biotite are here obviously independent phenomena. 1944Q. Jrnl. Geol. Soc. XCIX. 118 The plagioclase is sericitized and its larger plates show myrmekitic margins. 1964Amer. Mineral. XLIX. 50 The myrmekite type I..is formed by the myrmekitization of plagioclase already in the rock. 1972Mineral. Mag. XXXVIII. 573 Microprobe and optical measurements have shown the myrmekitic plagioclase of such intergrowths to be very similar compositionally to non-myrmekitic plagioclase. |