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廣島大學地學研究報告 Issue 12
published_at 1963-03-30
広島県勝光山産ろう石鉱物
"Rōseki": composing Minerals of the Shôkôzan, Hiroshima Prefecture.
IWAMOTO Shōmi
Abstract
The area surrounding Shôkôzan in Shôbara City, Hiroshima Prefecture, has recently become famous as an important Rōseki producing locality in Japan.
As the mineral constituents of the deposits, kaolin group minerals, pyrophyllite, sericite, corundum, diaspore, boehmite, quartz, alunite, hematite, pyrite and a sort of iron hydroxide are mentionable.
Mineralizations recognized in these deposits are characterized by the earlier kaolinization accompanying later pyrophyllitization, differring from those appeared in the related deposits of the other localities. Their effects on the country rocks are commonly so intense and complicated that it is difficult to ascertain their original lithologic textures.
As the mineral constituents of the deposits, kaolin group minerals, pyrophyllite, sericite, corundum, diaspore, boehmite, quartz, alunite, hematite, pyrite and a sort of iron hydroxide are mentionable.
Mineralizations recognized in these deposits are characterized by the earlier kaolinization accompanying later pyrophyllitization, differring from those appeared in the related deposits of the other localities. Their effects on the country rocks are commonly so intense and complicated that it is difficult to ascertain their original lithologic textures.
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