Almalyk Group

Porphyry copper (Cu-Au) deposit in Toshkent, Uzbekistan

Names and other identifiers

GMRAP ID 411
Tract name Chatkal and Kurama Ranges (142pCu8001)
Included sites Almalyk, Kal'makyr (Bolshoi and Maly), Daln'ee (Central), Karabulak, NW Balikti
Site status deposit

Geographic location

Country Uzbekistan
State or province Toshkent
Geographic location 69.646094, 40.814213
Geologic map unit 69.646094, 40.814213
Nearby data

Geologic information

Deposit type Porphyry copper
Deposit subtype Cu-Au
Age (Ma) 290Ma
Age determination method unknown
Age range 309–270 Ma
Age reference Singer and others (2008)
Minerals actinolite, albite, anhydrite/gypsum, ankerite, azurite/malachite, barite, biotite, chalcocite/digenite, chalcopyrite, chlorite, chrysocolla, covellite, cuprite/tenorite, epidote, galena, gold, hematite/specularite, magnetite, marcasite, molybdenite, psilomelane, pyrite, pyrrhotite, scheelite, sericite, sphalerite, tellurides, tetrahedrite/tennantite, turquoise, wolframite, zeolite
Associated rocks breccia, granodiorite porphyry, hornfels, lamprophyre, monzonite, skarn, syenite, andesitic dacite porphyry, diabase dike, diorite, dolomitic marble, gabbro, limestone, quartz porphyry, sandstone, syenodiorite
Tectonic setting postconvergence
Stratigraphic age Late Carboniferous–Permian

Commodity and development information

Development status Prospect
Major commodities Cu, Au
Tonnage (Mt) 6,080Mt
Cu grade (%) 0.39%
Mo grade (%) 0.0023%
Au grade (g/t) 0.37g/t
Ag grade (g/t) 2.2g/t
Contained copper 24,000,000t
Gold-Moly ratio 160

Reference information

Comments Total reserves include: Kal'makyr, 2700 Mt at 0.4% Cu, 0.005% Mo, 0.509 g/t Au, 2.08 Ag, Dalnee, 2500 Mt at 0.4% Cu, 0.35g/t Au, 3.2g/t Ag, NW Balykty, 880 Mt at 0.34% Cu. In concentrate: Pt n.d., up to 20 ppb Pd. Location: SE end of Kal’makyr pit; representative of Almalyk ore field in Singer and others (2008) owing to 2-km distance rule.
Study area name West Central Asia
References Golovanov (1978); Golovanov and others (2005); Krivtsov and others (1986); Meshchaninov and Azin (1973); Metal Mining Agency of Japan (1997); Pavlova (1978); Zvezdov and others (1993); Singer and others (2008); Seltmann and others (2009)
Site reference Berger and others (2014)
Golovanov, I.M., 1978, [Copper mineralization in the western Tian Shan]: Tashkent, Fan, 239 p. [In Russian.]
Golovanov, I.M., Seltmann, R., and Kremenetsky, A.A., 2005, The porphyry Cu-Au/Mo deposits of central Eurasia—2. The Almalyk (Kal’makyr-Dalnee) and Saukbulak Cu-Au porphyry systems, Uzbekistan, in Porter, T.M., ed., Super porphyry copper and gold deposits—A global perspective: Adelaide, PGC Publishing, v. 2, p. 513–523. (Abstract also available at http://www.portergeo.com.au/publishing/superporphyry/superpstart.html.)
Krivtsov, A.I., Migachev, I.F., and Popov, V.S., 1986, Porphyry copper deposits of the world: Moscow, Nedra, 236 p. [In Russian.]
Meshchaninov, Ye.Z., and Azin, V.N., 1973, Distribution of gold in a copper porphyry deposit, Almalyk region: International Geology Review, v. 15, p. 660–663. (Also available at http://dx.doi.org/10.1080/00206817309475937.)
Metal Mining Agency of Japan, 1997, Non-ferrous metal deposits of C.I.S. countries and Mongolia: Metal Mining Agency of Japan (MMAJ), 20 p.
Pavlova, I.G., 1978, [Porphyry copper deposits]: Leningrad, Nedra, 275 p. [In Russian.]
Seltmann, R., Shatov, V., and Yakubchuk, A., 2009, Mineral deposits database and thematic maps of Central Asia: London, Natural History Museum, Centre for Russian and Central Eurasian Mineral Studies (CERCAMS), 143 p. and ArcGIS 9.2, ArcView 3.2 and MapInfo 6.0 (7.0) GIS packages, scale 1:1,500,000, CD-ROM.
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 http://pubs.usgs.gov/of/2008/1155/.Zvezdov, 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 http://dx.doi.org/10.1016/0169-1368(93)90013-O.)