Porphyry copper deposit in Chukotskiy avtonomnyy okrug, Russian Federation

Names and other identifiers

Alternate names Baimka
Tract name Kolyma (142pCu8512)
Site status deposit

Geographic location

Country Russian Federation
State or province Chukotskiy avtonomnyy okrug
Geographic location 164.44, 66.56
Geologic map unit 164.44, 66.56
Nearby data

Geologic information

Deposit type Porphyry copper
Age (Ma) 141.8Ma
Age determination method U-Pb
Age range 141.8 ±2 Ma
Age reference Singer and others (2008)
Minerals argentite, arsenopyrite, bornite, chalcocite, chalcopyrite, covellite, cuprite, enargite, galena, gold, hematite, ilmenite, magnetite, molybdenite, pyrite, pyrrhotite, sphalerite, tennantite
Associated rocks monzodiorite intrusion, quartz monzodiorite porphyry and syenite porphyry, breccia, diorite porphyry, monzodiorite porphyry
Tectonic setting mixed
Stratigraphic age Early Cretaceous

Commodity and development information

Development status Prospect
Major commodities Cu
Minor commodities Mo, Au, Ag
Tonnage (Mt) 1,517Mt
Cu grade (%) 0.52%
Mo grade (%) 0.0092%
Au grade (g/t) 0.3g/t
Ag grade (g/t) 1.4g/t
Contained copper 7,900,000t
Gold-Moly ratio 30

Reference information

Comments Except for Ag grade, all grades from Chitalin and others (2011), with 0.4% Cu equivalent cut-off. Based on geophysical data, hydrothermal alteration and sulfide mineralization extend more than 1 km at depth. Further exploration may increase of resources to at least 10 Mt of copper.Quartz and quartz-sulfide veinlets and veins are located in the core of the deposit. Central core of potassic alteration surrounded by propylitic alteration; late, linear phyllic alteration zones and lenses with NW, NE, and east-west orientations host stockwork veining.
Study area name Northeast Asia
References Chitalin and others (2011); Kaminskiy (1989); Migachev and others (1995); Nokleberg and others (1993); Rozhdestvenski and others (1976); Volchkov and others (1982); Volkov, Savva and others (2006); Zvezdov and others (1993); Kirkham and Dunne (2000)Singer and others (2008); Chukotka Autonomus Region (2009)
Site reference Mihalasky, Ludington, Alexeiev, and others (2015)
Chitalin, Andrei; Shtengelov, Artem; Agapitov, Dmitry; Fomichev, Eugene; Usenko, Viktor; and Matevosyan, Maria, 2011, Geology and mineral resources of the giant Peschanka porphyry Cu-Au-Mo deposit, western Chukotka, Russia: Society for Geology Applied to Mineral Deposits (SGA) Biennial Meeting, 11th, Antofagasta, Chile, September 26–29, 2011 [Proceedings], 3 p. (Abstract also available at
Chukotka Autonomus Region, 2009, Resource estimation: accessed November 25, 2009, at [Web page no longer available.]
Kaminskiy, V.G., 1989, A geologic exploration model for porphyry copper deposits of the Baimka zone: International Geological Review, v. 31, p. 1240–1250. (Also available at, R.V., and Dunne, K.P.E., comps., 2000, World distribution of porphyry, porphyry-associated skarn, and bulk-tonnage epithermal deposits and occurrences: Canada Geological Survey Open File 3792a, 26 p. and 1 diskette. (Also available at
Migachev, I.F., Girfanov, M.M., and Shishakov, V.B., 1995, Copper porphyry Peschanka deposit: Ore and Metals, no. 3, p. 48–58. [In Russian.]
Nokleberg, W.J., Bundtzen, T.K., Grybeck, Donald, Koch, R.D., Eremin, R.A., Rozenblum, I.S., Sidorov, A.A., Byalobzhesky, S.G., Sosunov, G.M., Shpikerman, V.I., and Gorodinsky, M.E, 1993, Metallogenesis of mainland Alaska and the Russian northeast: U.S. Geological Survey Open-File Report 93–339, 230 p. (Also available at and at
Rozhdestvenski, Y.P., Edovin, Y.I., Igoshina, I.I., and Kalabashkin, S.N., 1976, Copper porphyry mineralization in the Oloi zone (western Chukotka): Geology of Ore Deposits, v. 18, no. 4, p. 89–93. [In Russian.]
Singer, D.A., Berger, V.I., and Moring, B.C., 2008, Porphyry copper deposits of the world—Database and grade and tonnage models, 2008: U.S. Geological Survey Open-File Report 2008-1155, [45] p. and digital data, accessed December 31, 2013, at
Volchkov, A.G., Sokirkin, G.I., and Shishakov, V.B., 1982, Geological structure and composition of ores from Anyui porphyry copper deposit (northeast of the USSR): Geology of Ore Deposits (Geologiya Rudnykh Mestorozhdeni), v. 24, no. 6, p. 86–92. [In Russian.]
Volkov, A.V., Savva, N.E., Sidorov, A.A., Egorov, V.N., Shapovalov, V.S., Prokof’ev, V.Yu., and Kolova, E.E., 2006, Spatial distribution and formation conditions of Au-bearing porphyry Cu-Mo deposits in the northeast of Russia: Geology of Ore Deposits, v. 48, p. 448–472. (Also available at, V.S., Migachev, I.F., and Girfanov, M.M., 1993, Porphyry copper deposits of the CIS and the models of their formation: Ore Geology Reviews, v. 7, p. 511–549. (Also available at