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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Peraluminous rock ： ウィキペディア英語版 Peraluminous rock Peraluminous rocks are igneous rocks that have a molar proportion of aluminium oxide higher than the combination of sodium oxide, potassium oxide and calcium oxide.〔Blatt, Harvey and Robert J. Tracy, ''Petrology,'' Freeman, 2nd ed., 1995, p. 516 ISBN 0-7167-2438-3〕 This contrasts with peralkaline in which the alkalis are higher, metaluminous where aluminium oxide concentration is lower than the combination, but above the alkalis, and subaluminous in which aluminia concentration is lower than the combination. Examples of peraluminous minerals include biotite, muscovite, cordierite, andalusite and garnet. Peraluminous corresponds to the aluminum saturation index values greater than 1. ==References== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Peraluminous rock」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.