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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 Litchfieldite ： ウィキペディア英語版 Litchfieldite Litchfieldite is a rare igneous rock. It is a coarse-grained, foliated variety of nepheline syenite,〔Le Maitre, R.W. (2002) ''Igneous Rocks - A Classification and Glossary of Terms'', 2nd edition, Cambridge, Cambridge University Press, page 105. ISBN 0-521-66215-X〕 sometimes called nepheline syenite gneiss or gneissic nepeheline syenite.〔Robins, B. and Tysseland, M. (1979) (''Fenitization of some mafic igneous rocks in the Seiland province, northern Norway'' ), Norsk Geologisk Tidsskrift, Volume 59 Number 1 pages 1-23, page 3. Retrieved 2015-07-20.〕 Litchfieldite is composed of two varieties of feldspar (mostly albite but also some microcline), with nepheline, sodalite, cancrinite and calcite. The mafic minerals, when present, are magnetite and an iron-rich variety of biotite (lepidomelane). ==Occurrence== The rock was named after its occurrence at Litchfield, Maine, USA, by Bayley in 1892.〔(Litchfieldite and the Litchfield Sodalite Locality, Maine Geological Survey )〕〔Williams, Howel, Francis J. Turner and Charles M. Gilbert, ''Petrography,'' Freeman, 1954, p. 117〕 It is a very rare rock and also occurs in Blue Mountain and French River, Canada;〔 Soroy and Val River, Norway; Cevadais, Portugal; Canaã,〔 ''Industrial Minerals & Rocks,'' Society for Mining, Metallurgy, and Exploration; 7th ed. 2006, p. 661 ISBN 978-0-87335-233-8 〕 Boca Nova, Itajú da Colonia and Peixes, Brazil. 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「Litchfieldite」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.