PorterGeo
SEARCH  GO BACK  SUMMARY  REFERENCES
Talnakh

Siberia, Russia

Main commodities: Ni Cu PGE PGM
Our International
Study Tour Series
The last tour was
OzGold 2019
Our Global Perspective
Series books include:
Click Here
Super Porphyry Cu and Au

Click Here
IOCG Deposits - 70 papers
All available as eBOOKS
Remaining HARD COPIES on
sale. No hard copy book more than  AUD $44.00 (incl. GST)
Big discount all books !!!


The Permo-Triassic Noril'sk - Talnakh groups of deposits of Siberia, northern Russia are 35 km apart and are developed near the north-western margin of the Siberian Platform. The deposits are found within and adjacent to gabbro-dolerite sills that represent part of the feeder zone of the up to 3500 m thick, vast Permo-Triassic Siberian trap basalts.

The basement to the Siberian Platform is composed of crystalline Proterozoic rocks overlain by late Proterozoic sediments, lower Palaeozoic marine dolomites, argillites and sandstones, and by Devonian marls and evaporites. These are followed by Carboniferous shallow water limestones, continental sediments and coal measures. The Palaeozoic sequence is around 6000 m thick.

The host sills are developed within and adjacent to the continental scale, NNE trending Noril'sk-Kharayelakh fault. These ore bearing sill like intrusive bodies have known dimensions of as much as 15x0.5 to 2 km and are from 50 to 300 m in thickness, although they only represent 1 to 2% of the total mafic intrusives in the district. A typical sill is said to consist of a lower olivine bearing, melanocratic gabbro-dolerite with a picritic composition, passing upwards into leucocratic gabbro-dolerites near the top. This has been variously interpreted to result from differentiation or from multiple intrusive pulses. On both the upper and lower margins there are zones of taxite containing increased sulphides, platinoids and chromite. A taxite is a mafic igneous rock with a very variable texture (from fine to pegmatitic) - and composition (leucocratic to melanocratic) - with discrete ghost-like remnants of inclusions of other gabbroic and country rocks. The upper zone is more weakly taxitic. A strong hornfels halo extends for 100 m below the sills and up to 250 m above.

There are three main ore types developed at Noril'sk and Talnakh. These are:

i). Disseminated sulphides within the differentiated gabbro-dolerite sills, principally on the lower margins of the mineralised sills in the taxitic and to a lesser degree the picritic zones. They occur as droplets, schleiren and fine sulphide veinlets, forming sheet like conformable bodies up to 40 m thick and comprise combinations of chalcopyrite, cubanite and pyrrhotite with troilite and pentlandite. Grades average 0.5 to 0.6% Ni, 0.6 to 0.7% Cu, and 5 to 6 g/t PGE;

ii). Massive sulphides found principally on the lower contact of the mineralised sills, both within the enclosing rocks and to a lesser degree the sill, and are often separated from the sill by several metres of barren sediment or cupriferous mineralisation. Sometimes they are also found on the upper margin of the sill. In other locations the massive sulphides cut across the sill to its upper margins. The massive sulphides are divided into either pyrrhotite, cubanite or chalcopyrite types, depending on the dominant sulphide, with associated pentlandite moihoekite and talnakhite. Individual massive sulphide bodies may be up to 60 m thick as at Oktyabr'sky where it cover an area of 3.5 sq km. Grades vary drastically with the sulphide assemblage, but are of the order of 2.8% Ni, 5.6% Cu and 15 g/t PGE. There is evidence that the massive sulphides post date the disseminated sulphides; and

iii). Vein disseminations of 'cupriferous' ore which are found below the massive sulphide, between the massive sulphide and the lower margins of the sill, and within sediments on the upper margin of the sill, often associated with zones of 'skarn' altered brecciated dolerite and marl/argillite. They may be 10 to 20m thick. The main metallic minerals are pyrrhotite, pentlandite, chalcopyrite, cubanite, millerite, pyrite, magnetite, bornite, chalcocite, etc.

The total production + resource in the Noril'sk-Talnakh district are quoted by Naldrett (2004) at:
     1.309 Gt @ 1.77% Ni, 3.57% Cu, 0.061% Co, 9.5 g/t PGE (including 1.84 g/t Pt, 7.31 g/t Pd).

Ore reserve and mineral resources at 31 December, 2011 (Noril'sk Nickel webpage, 2013) were:
  Talnakh proved ore reserves
      Massive sulphide ore - 46.867 Mt @ 2.71% Ni, 3.36% Cu, 5.81 g/t Pd, 1.33 g/t Pt, 0.15 g/t Au, 7.54 g/t 6PGM
      Cuprous ore - 34.468 Mt @ 1.04% Ni, 4.19% Cu, 9.95 g/t Pd, 2.37 g/t Pt, 0.70 g/t Au, 12.44 g/t 6PGM
      Disseminated ore - 40.966 Mt @ 0.45% Ni, 0.79% Cu, 3.49 g/t Pd, 1.29 g/t Pt, 0.19 g/t Au, 4.97 g/t 6PGM
    TOTAL Talnakh proved ore - 122.301 Mt @ 1.48% Ni, 2.73% Cu, 6.20 g/t Pd, 1.61 g/t Pt, 0.32 g/t Au, 8.06 g/t 6PGM
  Talnakh probable ore reserves
      Massive sulphide ore - 79.074 Mt @ 2.55% Ni, 2.69% Cu, 4.84 g/t Pd, 0.89 g/t Pt, 0.14 g/t Au, 6.30 g/t 6PGM
      Cuprous ore - 49.412 Mt @ 0.79% Ni, 3.53% Cu, 7.52 g/t Pd, 1.93 g/t Pt, 0.56 g/t Au, 9.67 g/t 6PGM
      Disseminated ore - 32.996 Mt @ 0.37% Ni, 0.62% Cu, 0.76 g/t Pd, 1.29 g/t Pt, 0.19 g/t Au, 3.47 g/t 6PGM
    TOTAL Talnakh probable ore - 161.482 Mt @ 1.56% Ni, 2.53% Cu, 5.17 g/t Pd, 1.18 g/t Pt, 0.28 g/t Au, 6.75 g/t 6PGM
  Talnakh measured + indicated mineral resources
      Massive sulphide ore - 20.470 Mt @ 4.23% Ni, 5.83% Cu, 12.95 g/t Pd, 2.54 g/t Pt, 0.51 g/t Au, 15.91 g/t 6PGM
      Cuprous ore - 1.505 Mt @ 0.80% Ni, 2.26% Cu, 6.64 g/t Pd, 1.91 g/t Pt, 0.41 g/t Au, 8.74 g/t 6PGM
      Disseminated ore - 1332.722 Mt @ 0.52% Ni, 1.05% Cu, 2.89 g/t Pd, 0.83 g/t Pt, 0.19 g/t Au, 3.89 g/t 6PGM
    TOTAL Talnakh resources - 1354.697 Mt @ 0.57% Ni, 1.12% Cu, 3.04 g/t Pd, 0.86 g/t Pt, 0.19 g/t Au, 4.08 g/t 6PGM
  Noril'sk disseminated ore
      Proved reserves - 32.897 Mt @ 0.34% Ni, 0.48% Cu, 4.03 g/t Pd, 1.64 g/t Pt, 0.17 g/t Au, 5.98 g/t 6PGM
      Probable reserves - 22.306 Mt @ 0.28% Ni, 0.36% Cu, 4.28 g/t Pd, 1.75 g/t Pt, 0.20 g/t Au, 6.37 g/t 6PGM
      Measured + indicated resources - 25.802 Mt @ 0.33% Ni, 0.45% Cu, 4.24 g/t Pd, 1.67 g/t Pt, 0.15 g/t Au, 6.30 g/t 6PGM
  Combined Talnakh and Noril'sk ores
      Proved + probable reserves - 338.986 Mt @ 1.33% Ni, 2.26% Cu, 5.38 g/t Pd, 1.42 g/t Pt, 0.28 g/t Au, 7.12 g/t 6PGM
      Probable reserves - 22.306 Mt @ 0.28% Ni, 0.36% Cu, 4.28 g/t Pd, 1.75 g/t Pt, 0.20 g/t Au, 6.37 g/t 6PGM
      Measured + indicated resources - 1380.499 Mt @ 0.57% Ni, 1.11% Cu, 3.07 g/t Pd, 0.87 g/t Pt, 0.19 g/t Au, 4.12 g/t 6PGM
      Inferred resources - 462.709 Mt @ 0.89% Ni, 1.85% Cu, 4.40 g/t Pd, 1.12 g/t Pt, 0.26 g/t Au, 5.75 g/t 6PGM.

The most recent source geological information used to prepare this summary was dated: 2001.    
This description is a summary from published sources, the chief of which are listed below.
© Copyright Porter GeoConsultancy Pty Ltd.   Unauthorised copying, reproduction, storage or dissemination prohibited.


  References & Additional Information
   Selected References:
Distler V V  1994 - Platinum Mineralization of the Norilsk Deposits: in Naldrett A J, Lightfoot P C, Sheahan P (Eds),  The Sudbury - Norilsk Symposium Ontario Geological Survey   Special Publication 5 pp 243-260
Fedorenko V A  1994 - Evolution of Magmatism as Reflected in the Volcanic Sequence of the Norilsk Region: in Naldrett A J, Lightfoot P C, Sheahan P (Eds),  The Sudbury - Norilsk Symposium Ontario Geological Survey   Special Publication 5 pp 171-184
Kunilov V Ye  1994 - Geology of the Norilsk Region: The History of the Discovery, Prospecting, Exploration and Mining of the Norilsk Deposits: in Naldrett A J, Lightfoot P C, Sheahan P (Eds),  The Sudbury - Norilsk Symposium Ontario Geological Survey   Special Publication 5 pp 203-216
Lightfoot P C, Naldrett A J, Gorbachev V A, Fedorenko V A Hawkesworth C J, Hergt J, Doherty W  1994 - Chemostratigraphy of Siberian Trap Lavas, Norilsk District, Russia: Implications for the Source of Flood Basalt Magmas and their Associated Ni-Cu Mineralization: in Naldrett A J, Lightfoot P C, Sheahan P (Eds),  The Sudbury - Norilsk Symposium Ontario Geological Survey   Special Publication 5 pp 283-312
Likhachev A P  1994 - Ore-Bearing Intrusions of the Norilsk Region: in Naldrett A J, Lightfoot P C, Sheahan P (Eds),  The Sudbury - Norilsk Symposium Ontario Geological Survey   Special Publication 5 pp 185-202
Naldrett A J, Asif M, Gorbachev V A, Kunilov V Ye, Stekhin A I Fedorenko V A, Lightfoot P C  1994 - The Composition of the Ni-Cu Ores of the Oktyabrsky Deposits, Norilsk Region: in Naldrett A J, Lightfoot P C, Sheahan P (Eds),  The Sudbury - Norilsk Symposium Ontario Geological Survey   Special Publication 5 pp 357-372
Naldrett A J, Lightfoot P C  1999 - Ni-Cu-PGE Deposits of the Norilsk Region, Siberia: Their Formation in Conduits for Flood Basalt Volcanism: in Keays R R, Lesher C M, Lightfoot P C, Farrow C E G, (Eds),  Dynamic Processes in Magmatic Ore Deposits and their Application in Mineral Exploration Geological Association of Canada, Short Course Notes   v13 pp 195-249
Simonov O N, Lulko V A, Amosov Yu N, Salov V M  1994 - Geological Structure of the Norilsk Region: in Naldrett A J, Lightfoot P C, Sheahan P (Eds),  The Sudbury - Norilsk Symposium Ontario Geological Survey   Special Publication 5 pp 161-170
Stekhin A I  1994 - Mineralogical and Geochemical Characteristics of the Cu-Ni Ores of the Oktyabrsky and Talnakh Deposits: in Naldrett A J, Lightfoot P C, Sheahan P (Eds),  The Sudbury - Norilsk Symposium Ontario Geological Survey   Special Publication 5 pp 217-230
Torgashin A S  1994 - Geology of the Massive and Copper Ores of the Western Part of the Oktyabrsky Deposit: in Naldrett A J, Lightfoot P C, Sheahan P (Eds),  The Sudbury - Norilsk Symposium Ontario Geological Survey   Special Publication 5 pp 231-241
Zenko T E, Czamanske G K  1994 - Spatial and Petrologic Aspects of the Intrusions of the Norilsk and Talnakh Ore Junctions: in Naldrett A J, Lightfoot P C, Sheahan P (Eds),  The Sudbury - Norilsk Symposium Ontario Geological Survey   Special Publication 5 pp 263-282


Porter GeoConsultancy Pty Ltd (PorterGeo) provides access to this database at no charge.   It is largely based on scientific papers and reports in the public domain, and was current when the sources consulted were published.   While PorterGeo endeavour to ensure the information was accurate at the time of compilation and subsequent updating, PorterGeo takes no responsibility what-so-ever for inaccurate or out of date data, information or interpretations.

Top | Search Again | PGC Home | Terms & Conditions

PGC Logo
Porter GeoConsultancy Pty Ltd
 International Study Tours
     Tour photo albums
 Ore deposit database
 Conferences & publications
 Experience
PGC Publishing
 Our books  &  bookshop
     Iron oxide copper-gold series
     Super-porphyry series
     Porhyry & Hydrothermal Cu-Au
 Ore deposit literature
 
 Contact  
 What's new
 Site map
 FacebookLinkedin