著者

近藤 文次郎

出版者

一般社団法人 資源・素材学会

雑誌

日本鉱業会誌 (ISSN:03694194)

巻号頁・発行日

vol.71, no.805, pp.347-350, 1955-07-25 (Released:2011-07-13)

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In this paper the writer likes to describe the features of the deposits of the Shirane mine. According to some investigators, the lower part of the Mt. Motoshirane consists of the Komenashi lava-flows, the upper part the Motoshirane lava-flows and accompaning tuff-breccies. The No.3 deposit described here consists of impregnated free sulphur ore embedded in the tuff-breccia and two pyroxene desite of the Motoshirane volcamo. The ore-forming fluid may be the hydrothermal solution which was ascended through the fissures due to post volcmic displacement.The agglomelatic structure of ring ores in the deposits is very common.Topography and geological structure of the Mt. Motoshirane have great bearing on defining of the deposits as well as on prospecting and mining.