| GMRAP ID | 417 |
|---|---|
| Tract name | Late Paleozoic Balkhash-Ili magmatic arc (west) (142pCu8003c) |
| Site status | deposit |
| Country | Kazakhstan |
|---|---|
| State or province | Qaraghandy oblysy |
| Geographic location | 73.198611, 46.256667 |
| Geologic map unit | 73.198611, 46.256667 |
| Nearby data |
| Deposit type | Porphyry copper |
|---|---|
| Age determination method | Geologic inference |
| Age range | mid-Carboniferous–Late Carboniferous |
| Age reference | Singer and others (2008) |
| Minerals | azurite/malachite, bornite, chalcocite, chalcopyrite, chlorite, chrysocolla, covellite, galena, hematite, limonite, molybdenite, pyrite, pyrrhotite, sericite, sphalerite, tenorite |
| Associated rocks | breccia, granite porphyry, hornfels, tonalite porphyry, conglomerate, ignimbrite, rhyodacite, rhyolite, rhyolite lava breccia, sandstone, tuff |
| Tectonic setting | continental margin |
| Stratigraphic age | mid-Carboniferous–Late Carboniferous |
| Development status | Prospect |
|---|---|
| Major commodities | Cu |
| Minor commodities | Mo, Ag, Zn, Pb |
| Tonnage (Mt) | 324Mt |
| Cu grade (%) | 0.27% |
| Mo grade (%) | 0.007% |
| Au grade (g/t) | 0.024g/t |
| Contained copper | 870,000t |
| Gold-Moly ratio | 3 |
| Comments | Grade: 0.260.33% Cu (0.3% Cu, in the average), 0.0030.009% Mo (0.007% Mo, in the average). Geologically the deposit comprises of a VendlockianLudlowian effusive-sedimentary bed of sandstones with interbeds of tuffs, gritstones and conglomerates found in the east and south of the area; of liparite and liparite-dacite lavas, tufaceous lavas, tuffs, ignimbrites, all probably of Upper Devonian age and which occur in the western and southwestern flanks of the deposit. A complex shaped intrusive body of plagiogranite porphyries strikes northwesterly for 2 km and has a thickness of 0.60.8 km. The contacts between the massif and the host rocks are steep and dip toward the center. Three varieties of intrusive rocks have been recognized: basic quartz plagiodiorite porphyrites, plagiogranite porphyrities with a predominant allotriomorphic granular or a granular mass, plagiogranite porphyries with a predominant felsite mass. Dikes of granite porphyries occupy faults around the plagiogranite porphyries. The ore-bearing quartz-sulfide stockwork is accompanied by quartz-sericite alteration, quartz-feldspar, and quartz-carbonate veinlets. Mineralization is pervasive. Orebody dimensions are 7501900 m along the strike, 200800 m down dip and 8123 m thick. Discovered in 1954 by Volobuev V.I. |
|---|---|
| Study area name | West Central Asia |
| References | Kolesnikov and others (1986); Kudryavtsev (1996); Zhukov and others (1998); Singer and others (2008) |
| Site reference | Berger and others (2014) |