満洲の満俺鉱床に就て
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概要
- 論文の詳細を見る
Though, there are four types of manganese deposits : are beds, replacement deposits, veins and residual deposits in Manchuria, are beds and replacement deposits are only economically workable. Almost all ores of sedimentary origin are low grade, but their are reserves are estimated to be large amount. Replacement deposits are chiefly found near the border between Je-ho and Chinchou. The ores are high grade, but their are reserves are rather small.<BR>To produce large amount of manganese are in future, it requires great efforts of development for are beds and researches of are dressing for low grade ore.
- 社団法人 東京地学協会の論文