| 释义 |
greisen Min.|ˈgraɪz(ə)n|
[Ger.; a dial. var. of greisz, f. greiszen to split.]
A granitic rock with crystalline-granular texture, consisting chiefly of quartz and mica. Hence ˈgreisening vbl. n., greiseniˈzation, the pneumatolytic conversion of granite of similar rocks into greisen.
1878Lawrence tr. Cotta's Rocks Class. 312 Greisen, a compound of quartz and mica. 1879Rutley Study Rocks xii. 211 Greisen is a granular-crystalline rock, consisting of quartz and mica, the latter usually lithia-mica. 1907Reid & Flett Geol. Land's End District iv. 58 There is not much evidence to show whether the tourmalinisation preceded, accompanied or followed the greisening. 1920A. Holmes Nomencl. Petrol. 114 The process whereby igneous emanations transform granite into greisen is called greisening or greisenisation. 1934Q. Jrnl. Geol. Soc. XC. 348 Greisenization is always regarded as a typical example of pneumatolysis. 1962W. T. Huang Petrol. iv. 97 Three main types of alteration primarily due to the action of volatiles or pneumatolysis are connected with the intrusion of granitic plutons. They are tourmalinization, greisening, and kaolinization. 1970Mineral. Abstr. XXI. 39/2 The author discusses the chemical changes involved in greisenization. |