Koktasdzhal

Porphyry copper (Cu-Au) deposit in Qaraghandy oblysy, Kazakhstan

Names and other identifiers

GMRAP ID 427
Alternate names Koktasjal, Koktaszhal
Tract name Kazakh-Tarim (142pCu8505)
Site status deposit

Geographic location

Country Kazakhstan
State or province Qaraghandy oblysy
Geographic location 76.1622, 50.1622
Geologic map unit 76.1622, 50.1622
Nearby data

Geologic information

Deposit type Porphyry copper
Deposit subtype Cu-Au
Age determination method Geologic inference
Age range Late Carboniferous–Permian
Age reference Singer and others (2008)
Minerals actinolite, azurite/malachite, bornite, chalcocite, chalcopyrite, chlorite, chrysocolla, copper, covellite, epidote, gold, hematite, ilmenite, magnetite, molybdenite, pyrite, sericite, tennantite/tetrahedrite
Associated rocks granite porphyry, hornfels, tonalite porphyry
Tectonic setting island arc
Stratigraphic age Late Carboniferous–Permian

Commodity and development information

Development status Prospect
Major commodities Cu, Au, Ag
Tonnage (Mt) 57Mt
Cu grade (%) 0.62%
Au grade (g/t) 0.72g/t
Ag grade (g/t) 3.8g/t
Contained copper 350,000t
Gold-Moly ratio -9999

Reference information

Comments Grade and tonnage from Singer and others (2008); Seltmann and others (2009) reported a grade of 0.76% Cu, 0.9g/t Au, 3.8g/t Ag and an ore reserve tonnage of 0.37 Mt Cu. Exposed. The deposit is hosted in the andesite-basalt porphyrites and tuffs penetrated by granitoids of the Koktaszhalsky massif of tonalite-granodiorite-plagiogranite formation. The quartz-sulfide stockwork is mainly developed in the hanging wall of the apophysis and is accompanied by an intense silicification that has led to the formation of monoquartz rocks. Three orebodies: Northern, Bolshaya and Southern, all located in one mineralized zone 80–120 m.
Study area name Central Asian Orogenic Belt
References Kolesnikov and others (1986); Pavlova (1978); Plyushchev (1993); Shatov and others (1996); Zhukov and others (1998); Singer and others (2008); Seltmann and others (2009); Rundkvist (2001)
Site reference Mihalasky, Ludington, Hammarstrom, and others (2015)
Kolesnikov, V.V., Zhukov, N.M., Solodilova, V.V., and Filimonova, L.E., 1986, Porphyry copper deposits of the Balkhash region: Alma Ata, Nauka Press, 199 p. [In Russian.]
Pavlova, I.G., 1978, [Porphyry copper deposits]: Leningrad, Nedra, 275 p. [In Russian.]
Plyushchev, E.V., 1993, Map of hydrothermal-metasomatic formations of Kazakhstan fold area: St. Petersburg, A.P. Karpinsky All-Russian Institute of Geological Research (VSEGEI), 4 sheets, scale 1:1,500,000.
Rundkvist, D.V., ed., 2001 [2002], Mineragenic map of Russian Federation and adjacent states (with the boundaries of former USSR): Russian Federation Ministry of Natural Resources, State Research and Development Enterprise (Aerogeologica), 49 p., Excel workbook, and 1 map on 18 sheets, scale 1:2,500,000, CD-ROM.
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.
Shatov, V., Seltman, R., Kremenetsky, A., Lehman, B., Popov, V., and Ermolov, P., eds., 1996, Granite-related ore deposits of central Kazakhstan and adjacent areas: St. Petersburg, Glagol Publishing House, International Association on the Genesis of Ore Deposits (IAGOD), Working Group on Tin and Tungsten Deposits (WGTT), INTAS-93-1783 Project ""Ore-bearing granites of Eurasia—Anatomy and magmatic-hydrothermal mechanisms of ore deposition"", 400 p.
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/.
Zhukov, N.M., Kolesnikov, V.V., Miroshnichenko, L.M., Egembaev, K.M., Pavlova, Z.N., and Bakarasov, E.V., comps., 1998, Copper deposits of Kazakhstan, in Abdulin, A.A., and others, eds., Mineral resources of Kazakhstan: Almaty, Kazakhstan Ministry of Ecology and Natural Resources, 136 p.