北海道八雲鑛山における鑛化作用に伴う微量成分について

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The Yakumo mine is working lead-zinc-manganese deposits which are developed in the Neogene Tertiary formation and their mineralization in the deposits are recognized to occur in three stages from the mineral association of the ore., Quartz, rhodochrosite, galena, zincblende, pyrite and chalcopyrite etc., occur in each stage., The author studied minor elements contained in each of the ore minerals in the different stage, and the following results are obtained: 1) 24 elements (Si, Fe, Mn, Pb, Mg, Zn, Al, Cu, Ag, Au, Ba, Sb, As, Ca, Ti, Sr, Ru, Rh, Cd, Be, Ce, V, Ge and Se) are detected in the minerals from the deposits., Among those elements, Si, Fe, Mn, Al, Mg, Cu, Pb and Zn are discovered in all specimens, while another elements present in some specimens and they are sometimes absent., But no Ni, Co, Pt, Mo, W and Sn are found., 2) Above cited elements distribute differently in different stage of the mineralization., a) In case of minor components in the same minerals which crystallized in differents stages, variation (increase or decrease) of the following 4 groups of minor elements are observed: The groups are 1., Pb., Sb., Mg and Zn., 2., Al, Cu, Au and Ag., 3., Si, Mn, Fe, Ti, and Ca., 4., Ru, Cd, Be, Se, V, Rh, Ge, Sr, Ce and As : Contents of several minor elements vary in the same minerals in the different stages, with a few exception., But as some group tends to increase in the later stage, nevertheless in other minerals it may be not increase., According to circumstances it varies in the middle stage., b) In case of minor elements in different minerals in the same stage, minerals crystallized in earlier stage are apt to contain Si, Fe, Mg, Al, Ti, Cu, Pb and Zn, while the later crystallized mineals have As, Ag, Sb, Au, Mn, and Ca., But there are also exceptions in a few elements., Those minor elements have been found in minerals of epithermal origin., They may be considered to have some relation not only to the chemical character of the ore solution, but also to the condition of the ore-formation under which those minerals crystallized.,
日本地質学会の論文
1953-04-25

著者

齋藤忠夫
北海道大學理學部地質學鑛物學教室

北海道八雲鑛山における鑛化作用に伴う微量成分について

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