鳥取花崗岩に見られる黒雲母の特殊変質とその応用地質学的意義

元データ 1976-12-30 一般社団法人日本応用地質学会

概要

The characteristic altered biotites are observed in the weathered granite at eastern part of Tottori prefecture, Japan, From the mineral assemblage, they are classified into following types : (1) Kaolinite+interstratified Chlorite-Vermiculite (2) Kaolinite+Vermiculite+interstratified Chlorite-Vermiculite (3) Kaolinite+Chlorite+Vermiculite+interstratified Chlorite-Vermiculite. The hydroxy-aluminium interlayer may form in the all of discrete vermiculite and interstratified vermiculite. They are different from the mineral assemblages of weathered biotite. Judging from the mode of occurrence, they were formed from the altered chloritic biotite under the weathering condition. They gives a evidence of hydrothermal alteration before weathering of the parent rock.

著者

三浦 清 島根大学教育学部理科教育研究室
三浦 清 島根大学教育学部

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