Calcium distribution in a microperthite from the Nango pegmatite, Otsu City, Japan
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概要
- 論文の詳細を見る
滋賀児大津市南郷産ペグマタイト・マイクロパーサイト(Or_<77>Ab_<22>An_1)は,オルソクレース(Or)とアルバイト(Ab)からなるパッチないしは脈状タイプである。EPMAマッピングの結果,AbパッチでのCa分布は,部分ごとに異なることが判明した,ある部分では,AbパッチにCaがある程度濃集しているが,別の部分ではAbパッチ中でCaが枯渇している。いずれの場合も,AbパッチでのCa分布は極めて不均質である。ホストOr相と同じ程度に,Caが枯渇しているAbパッチも存在する。Orホストにも,組成変化が存在する。今回得られたAbパッチのCa分布パターンは,その成因として冷却過程における離溶よりはむしろAbパッチからのCaの移動を示唆している。
- 地学団体研究会の論文
- 1997-01-25
著者
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Nakano Satoshi
Department Of Gastroenterology Ogaki Municipal Hospital
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Nakano S
Department Of Natural Science Faculty Of Education Shiga University
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中野 聡志
Department of Natural Science, Faculty of Education, Shiga University
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