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The Roșia Poieni copper mine is a large open pit copper mine in the centre of Romania, 90 km northwest of Alba Iulia and 484 km north of the capital, Bucharest. Geographically the mine is located in the Apuseni Mountains, south of the Arieş River in Lupșa commune. The access to the site is made through a south-west industrial haul road from Cornii Valley that crosses the National Road no. 74 Alba-Iulia – Zlatna – Abrud when entering Abrud and through a north industrial haul road from Musca Valley that crosses the National Road no. 75 Campeni – Turda in Musca village, Lupșa commune.〔 The Rosia Poieni deposit was developed between the sixth and eight decade of the 20th Century within the Abrud-Musca-Bucium area (the Golden Quadrilateral) from Apuseni Mountains of the Metaliferi Mountains. The mine produces around 11,000 tonnes of copper a year and the mineral deposit represents 65% of the total copper reserves in Romania. The mine is owned by CupruMin a state owned company.〔 == Geology== Roșia Poieni represents the largest copper reserve in Romania and the second largest in Europe having estimated reserves of 1.5 billion tonnes of ore grading 0.36% copper. It is enclosed by eruptive sub-volcanoes Miocene rocks (micro-diorite or Fundoaia andesites).〔 The Fundoaia body has the shape of a vertical column of in height (+ → ) and in horizontal plane having the following dimensions: ÷/÷.〔 The eruptive body comes in contact (through the tectonic breccia) with andesite necks (Poieni, Curmatura, Melciu, Piatra Tichileu, and Jgheabului Hills) and with sedimentary Cretaceous rocks.〔 The porphyry copper deposit is made up mainly of fine disseminations, nests and veinlets (0.02÷3 cm) of pyrite, chalcopyrite, and magnetite; gold included in the chalcopyrite and pyrite, and secondary minerals: bornite, covellite, chalcocite, sphalerite, galena, molybdenite, germanite, malachite, azurite and is developed in microdioritic rocks.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Roșia Poieni copper mine」の詳細全文を読む スポンサード リンク
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