...For this reason, Bowen's theory was thought to be valid for volcanic rocks. In 1939, L. Wager and W. Deer studied the differentiation of magma in the Skaergaard layered intrusion in East Greenland and presented results that were quite different from Bowen's theory. In other words, when crystallization differentiation occurs in the parent magma, the magma becomes poor in MgO and rich in FeO and Fe 2 O 3 , but Na 2 O and K 2 O do not increase easily, and SiO 2 actually decreases. ... *Some of the terminology explanations that mention "wager, LR" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…このためボーエンの主張は火山岩については成り立つものと考えられていた。1939年ウェージャーL.R.WagerとディアW.A.Deerの2人は東部グリーンランドのスケアガード層状貫入岩体のマグマの分化を研究し,ボーエンの学説とはかなり異なる結果を発表した。すなわち本源マグマに結晶分化作用が起こると,マグマはMgOに乏しくなりFeOやFe2O3に富んでくるが,Na2OやK2Oはなかなか増加せず,SiO2もかえって減少する。… ※「ウェージャー,L.R.」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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