| 释义 |
mesosiderite Geol.|mɛsəʊˈsɪdəraɪt, -saɪˈdɪəraɪt, miːzəʊ-|
[ad. G. mesosiderit (G. Rose 1865, in Amtlicher Bericht 39. Versammlung deutscher Naturforscher und Ärzte, Giessen 1864 111); see meso- and siderite1.]
Any of the stony-iron meteorites in which the silicates are principally present as pyroxene and plagioclase.
1868Geol. Mag. V. 76 Meteorites have long since been arranged under two great divisions, the irons and the stones... In examining a certain number of these masses it has been thought convenient by some to establish a third, or intermediate division, to which the names of Mesosiderites, Lithosiderites, or of Siderolites, have been given. Ibid. 78 For these meteorites M. Rose has proposed a special name, that of mesosiderites. 1918G. T. Prior in Mineral. Mag. XVIII. 151 In the Rose–Tschermak–Brezina classification of meteorites the intermediate class of stony-irons, in which iron and stony matter occur in approximately equal amounts and to which Maskelyne gave the name siderolites, is divided into (1) siderolites proper..and (2) lithosiderites, comprising the groups of the mesosiderites, grahamites, and lodranites. Mesosiderites are defined as consisting of iron and crystalline olivine and bronzite... As seen in the following pages, chemical and microscopic examination of typical members of these two groups fails to reveal any real distinction between them based on the amount of felspar they contain. For the combined group, all the members of which contain abundant felspar, it is proposed to retain the earlier name of mesosiderite. 1962B. Mason Meteorites viii. 120 The stony-irons are a minor group of meteorites... They are divided into two major groups according to the nature of the silicate minerals, the pallasites (olivine stony-irons) and mesosiderites (pyroxene-plagioclase stony-irons). |