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Lepanto Mine, Mancayan (Mankayan) mineral district, Benguet Province, Cordillera Administrative Region, Luzon, Philippines
Photo: A. Österlöf 2006
Already in the 12th century copper ingots from Mankayan was exchanged with Chinese traders for their goods. When the Spanish came in the 16th century it became their main metal source.
The modern era of mining started in 1936 when the Lepanto Consolidated Mining Company was formed, starting with a 400 ton/day mill production, soon increased to 1000 tpd. Operated for a few years by Mitsui Mining Company/Japan during the WWII. The company was able to start mining again 2 years after the liberation, and increased production to 4500 tpd later. When the production ceased in the enargite mine/orebody in 1996 it had produced 743 kt of Cu, 92 t of Au and 390 t of Ag.
Today the company is working another orebody located appr 3km away: the Victoria project.
High grade gold quartz veins with silver values.
Source; Lepanto Cons. material received at mine visit in Dec. 2001.
Mineral List
18 entries listed. 16 valid minerals. 1 type locality (valid mineral).
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References
Gonzales, A. (1956) Geology of the Lepanto copper mine, Mankayan, Mountain Province. In: Copper Deposits of the Philippines (A.J. Kinkel Jr. et al,, eds.). Philippines Bureau of Mines, special publication 16, 17-50.
Rocks & Min.: 22:23. A copper-gold mine located 108 km North of Baguio. Owned by the Mitsui Mining Co. (WWII). Produced 7,500 tons of Cu (1944).
Rocks & Min.: 23:320
Bureau of Mines Mineral Trade Notes (Nov, 1947)
Anthony, Bideaux, Bladh, Nichols: "Handbook of Mineralogy", Vol. 1, 1990.
CLAVERIA R J R (2001) Mineral Paragenesis of the Lepanto Copper and Gold and the Victoria Gold Deposits, Mankayan Mineral District, Philippines, - Resour Geol, 51(2), pp.97-106.
Jeffrey W. Hedenquist, Antonio Arribas, and T. James Reynolds (1998) Evolution of an intrusion-centered hydrothermal system; Far Southeast-Lepanto porphyry and epithermal Cu-Au deposits, Philippines. Economic Geology; July 1998; v. 93; no. 4; p. 373-404
Rocks & Min.: 22:23. A copper-gold mine located 108 km North of Baguio. Owned by the Mitsui Mining Co. (WWII). Produced 7,500 tons of Cu (1944).
Rocks & Min.: 23:320
Bureau of Mines Mineral Trade Notes (Nov, 1947)
Anthony, Bideaux, Bladh, Nichols: "Handbook of Mineralogy", Vol. 1, 1990.
CLAVERIA R J R (2001) Mineral Paragenesis of the Lepanto Copper and Gold and the Victoria Gold Deposits, Mankayan Mineral District, Philippines, - Resour Geol, 51(2), pp.97-106.
Jeffrey W. Hedenquist, Antonio Arribas, and T. James Reynolds (1998) Evolution of an intrusion-centered hydrothermal system; Far Southeast-Lepanto porphyry and epithermal Cu-Au deposits, Philippines. Economic Geology; July 1998; v. 93; no. 4; p. 373-404
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