A copper sulfide mineral. It is formed as a secondary mineral by the decomposition of copper ores, mainly chalcopyrite, on the earth's surface, and as a primary mineral, it occurs in deep to epithermal deposits, kuroko deposits, contact metasomatic deposits (skarn-type deposits), and copper-bearing iron sulfide deposits. It is extremely rare to find euhedral deposits, and its occurrence is limited to certain areas, so it is not yet known in Japan. It is often lumpy and, together with other copper minerals, constitutes high-grade copper ores. It changes color immediately in air, turning from copper-red to blue-purple. In Japan, famous sources include the Akenobe Mine (closed) in Hyogo Prefecture, the Kotsu Mine (closed) in Yamakawa Town, Tokushima Prefecture (now Yoshinogawa City), and the Kamikita Mine (closed) in Tenmabayashi Village, Kamikita County, Aomori Prefecture. The English name is named after the Austrian mineralogist Ignaz von Born (1742-1791). [Akira Kato, May 21, 2018] [References] | | | | [Supplementary information] |Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend |
銅の硫化鉱物の一つ。二次鉱物として黄銅鉱を主とする銅鉱石の地表での分解によって生成され、また初生鉱物として、深~浅熱水鉱床、黒鉱鉱床、接触交代鉱床(スカルン型鉱床)、含銅硫化鉄鉱床などに産する。自形はきわめてまれで産地が局限され、日本ではまだ知られていない。多く塊状で他の銅鉱物とともに高品位銅鉱石を構成する。空気中でただちに変色し、銅赤色から青紫色となる。日本では、兵庫県明延(あけのべ)鉱山(閉山)、徳島県山川町(現、吉野川市)高越(こうつ)鉱山(閉山)、青森県上北(かみきた)郡天間林(てんまばやし)村(現、七戸(しちのへ)町)の上北鉱山(閉山)などが有名な産地であった。英名はオーストリアの鉱物学者ボルンIgnaz von Born(1742―1791)にちなむ。 [加藤 昭 2018年5月21日] [参照項目] | | | | [補完資料] |出典 小学館 日本大百科全書(ニッポニカ)日本大百科全書(ニッポニカ)について 情報 | 凡例 |
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