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栃木県鹿沼市堂ノ入鉱山産ソーダ南部石
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松原 聰
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加藤 昭
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宮脇 律郎
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小室 吉郎
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岡田 嘉夫
… It is an essential constituent of bedded manganese ores formed by very weak metamorphism. … The other manganese minerals are braunite, rhodochrosite and rhodonite. … Natronambulite and nambulite in Japan have been found in weakly to moderately meta-morphosed bedded manganese ore deposits which are principally developed in such a siliceous rock as chert in Jurassic melange. … The ore minerals therefrom include braunite without exception. …
国立科学博物館研究報告. C類, 地質学・古生物学 33, 1-5, 20071200
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