K-Ar AGES OF POTTERY STONE FROM TAKEHARA MINE, OKAYAMA PREFECTURE, JAPAN

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概要

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• Pottery stone occurs at Takehara Mine located in the eastern end of Okayama City. The mineral assemblages of ore consist mainly of quartz-sericite and quartz-sericite-albite together with scarce quartz-kaolinite. The deposit is divided into three mineral assemblage zones: namely, a kaolinite zone (quartz-kaolinite ± albite), a sericite zone (quartz-sericite-albite) and an albite zone (quartz-albite-sericite). The albite and sericite zones comprise most of the deposit. The pottery stone in this mine is formed by hydrothermal alteration of Cretaceous rhyolite. K-Ar dating indicates 72-76 Ma for this deposit, which is the same age as the roseki (pyrophyllite) deposit in the Mitsuishi area of Okayama Prefecture.

• 日本粘土学会の論文

著者

• Nishido Hirotsugu

  Research Institute Of Natural Sciences Okayama University Of Science

• Nishido H

  Research Institute Of Natural Sciences Okayama University Of Science

• Matsuda Toshihiko

  Earth Sciences Faculty Of Science Okoyama University

• ANDO SHINOBU

  (Present address)Tomakomai Weather Station, Japan Meteorological Agency

• Ando Shinobu

  (present Address)tomakomai Weather Station Japan Meteorological Agency

関連論文

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• CATHODOLUMINESCENCE AND THERMOLUMINESCENCE STUDIES OF CLAY MINERALS
• K-Ar AGES OF POTTERY STONE FROM TAKEHARA MINE, OKAYAMA PREFECTURE, JAPAN
• Intrusion and differentiation of the Tsubashiki diorite stock in the western part of Yamaguchi Prefecture, S.W. Japan. Formation of the stock through fractional crystallization and filter-pressing under a hydrous condition.

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