| 释义 |
mylonite Geol.|ˈmaɪlənaɪt|
[f. Gr. µυλών mill + -ite.]
A siliceous schist resulting from the crushing of quartzose rocks. Hence myloˈnitic a., ˈmylonized ppl. a., applied to such rocks; ˌmylonitiˈzation, myloniˈzation, the formation of mylonite; ˈmylonitize v. trans., to convert into mylonite; ˈmylonitized ppl. a. = mylonized ppl. a.
1886Rep. Brit. Assoc. 1026 The gneisses and pegmatites..are crushed, dragged, and ground out into a finely laminated schist (mylonite). 1888Hatch Gloss. in Teall Brit. Petrogr. 440 Mylonitic. 1901Nature 19 Sept. 513/1 All these mylonised rocks show a characteristic striping on the divisional planes. 1910Trans. Edin. Geol. Soc. IX. Spec. Part ‘The Thrust-Masses in the Western District of the Dolomites’ i. 18 The actual shear-plane is occupied by a finely mylonitized, greenish tuffoid material. Ibid. 19 The rock material immediately below the inturned ends is Porphyrite finely mylonitized into a tuff. 1913B. N. Peach et al. Geol. Central Ross-shire (Mem. Geol. Surv. Scot.) iii. 13 It would appear that the mylonisation of the gneiss is probably due to the passage over it of the great mass of rock brought forward by the Moine thrust-plane. Ibid. 112/2 (Index), Mylonitisation. 1926H. H. Read et al. Geol. Strath Oykell & Lower Loch Shin (Mem. Geol. Surv. Scot.) iii. 24 The intrusion is truncated by thrust-planes, and its rocks show evidence of shattering and mylonisation. 1956E. W. Heinrich Microsc. Petrogr. vii. 187 Such rocks as gabbros and peridotites may also be mylonitized. 1970New Scientist 7 May 275/2 The rocks are crushed, smashed and sheared into an extremely fine grained powder, in a process called mylonization. 1971Scott. Jrnl. Geol. VII. 311 At the western edge of the Moine Nappe mylonitization is the earliest recognizable tectonic event..and involves Cambrian rocks. |