| 释义 |
mafic, a. Min.|ˈmæfɪk|
[f. magnesium + L. f-errum iron + -ic.]
Pertaining to, containing, or designating the dark-coloured minerals of igneous rocks, which are predominantly ferromagnesian in character. Opp. felsic a.
1912W. Cross et al. in Jrnl. Geol. XX. 561 We suggest the term..mafic for the group of modal ferromagnesian minerals of all kinds. 1920[see femic a.]. 1926[see ankaramite]. 1969Nature 20 Dec. 1153/1 The lavas are intruded by ultramafic and mafic bodies and dyke swarms. 1970Ibid. 31 Oct. 413/1 The African rifts are sites of under-saturated, predominantly mafic volcanics erupted in comparatively small volume from single vents. 1971I. G. Gass et al. Understanding Earth v. 83/1 The oceans, with their thin (about 5 km) mafic crust. |