硫化ナトリウム水溶液と反応させた白鉛鉱に見られる交代組織：130 °Cから170 °Cにおける実験的研究

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タイトル別名
  • Replacement texture of cerussite reacted with aqueous sodium sulfide solution at temperatures from 130 °C to 170 °C
  • リュウカ ナトリウム スイヨウエキ ト ハンノウ サセタ シロ ナマリコウ ニ ミラレル コウタイ ソシキ : 130 ° C カラ 170 ° C ニ オケル ジッケンテキ ケンキュウ

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Replacement texture of cerussite by galena and hydrocerussite with differrent mode of occurrences are found in the reaction products of cerussite with Na2S hydrothermal solution at temperature from 130 to 170 °C. Whereas galena crystals occur mainly on and near the cerussite surfaces, hydrocerussites are found at the inside of cerussite-galena boundaries as replacement. This different modes of occurrences are well explained by the isolation of hydrothermal solution at/near the cerussite surfaces by the covering and growth of galena over cerussite. While galena crystals are deposited from the open solution enriched in sodium and sulfides, hydrocerussite are formed from the isolated solutions which are enriched in lead and carbonate under the effect of progressive dissolution of cerussite. Such isolation of solution by the covering and growth would be important for making the variation of mineral assemblages with various replacement textures under natural hydrothermal conditions.

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  • 資源地質

    資源地質 66 (1), 1-6, 2016

    資源地質学会

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