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Orebodies occur in limestone domes, covered by Piedmont Gravel; hematite averaging 54% iron is result of substitution of Triassic limestone by mineralizing agents; local geology presents water problem; overburden is mined by shovels; drainage is completed by 7 km tunnel below water table; production in 1959 was 500,000 tons, of which 130,000 tons came from underground mine.
Orebodies occur in limestone domes, covered by Piedmont Gravel; hematite averaging 54% iron is result of substitution of Triassic limestone by mineralizing agents; local geology presents water problem; overburden is mined by shovels; drainage is completed by 7 km tunnel below water table; production in 1959 was 500,000 tons, of which 130,000 tons came from underground mine.
Marquesado -- Spain's largest iron mine
Eng Min J
Huttl, J.B. (author)
1959
4 pages
Article (Journal)
English
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