含滿俺炭酸鹽鑛物の進化に關する 2・3 の資料
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概要
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The principal carbonate molecules in manganiferous carbonate minerals are MnCO 3, CaCO 3, FeCO 3 and MgCO 3., The compositions of the manganiferous carbonates are plotted in three ternary diagrams., A mineral appears in all three field if Ca, Mg and Fe are equally abundant., In plotting, a fourth metal in small quantity is added to others as follows: if Ca, it is added to Mg; if Fe, it is added to Mn, and if Mg, it is distributed 3/4 to Ca and 1/4 to Mn., Rhodochrosite, Mn-rich, occurs in the interspaces between rhodonite crystals as a product of the mineralization of the first period of the Kamiina Mine., Some varieties of rhodchrosite associated with tephroite and alabandite are also found among the products of the next several mineralizations., The Ca-rhodochrosite forming narrow veinlests is condidered to be the last carbonate mineral traversing the main part of the ore deposit., The evolution of maganiferous carbonates usually takes place in the following order in manganese deposits: Fe-Mn calcite →Fe-rhodochrosite →Ca-rhodochrosite →rhodochrosite →Ca-rhodochrosite →Mn-calcite., In epithermal veins the succession of ore minerals is usually quartz, pyrite, sphalerite, galena, finally argentite, gold and quicksilver., Undoubtedly it represents in the main decreasing temperature., Rhodochrosite, very rich in Mn, is found as a constituent of zinc and lead veins., Rhodochrosite, somewhat lime-rich, occurs in the gold and silver veins or quicksilver veins.,
- 日本地質学会の論文
- 1950-12-05