Database name: |
World Fe-oxide+/-Cu-Au-U (IOCG) deposits |
Compilers: |
Sunil S. Gandhi |
Release date: |
2015-03-04 |
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Deposit name(s): |
Peschansk; Pestchansk |
Political location(s): |
Russia; Province or state: Sverdlovskaya Oblast; Nearest community: Krasnotur'insk (12 km S) |
Deposit clan (type): |
Kiruna-type |
Deposit (sub) types: |
located at contact of carboate-tuffite units with diorite pluton; metasomatism of the host rocks extends 120 to 500 m from ore; volcanic host rocks albitized, epidotized, chloritized and carbonatized; Reference: Zitzmann, A., 1977: The Iron Ore Deposits of the Western U. S. S. R.; Section The Iron Ore Deposits of Europe and Adjacent Areas, in The Iron Ore Deposits of Europe and Adjacent Areas: Explanatory Notes to the International Map of the Iron Ore Deposits of Europe, 1:2,500,000 (Text and Figures), Edited by Walther, H. W.; Zitzmann, A., International Geological Congress, Commission for the Geological Map of the World, Subcommission for the Metallogenic Map of the World, Bundesanstalt fur Geowissenschaften und Rohstoffe, Postfach 51 01 53, D-3000 Hannover 51, Volume I, 418 p, p. 325 - 391 |
Deposit status: |
producer; Size category: 150 Mt; Status comments: 6 lensoid ore bodies and 11 sub-economic deposits along a 10 km belt; Vorontsovka at south end found in 1980; reserves in 1977: 173 Mt grading 48.5 to 54 % Fe in 4 sectors; 0.61 % Cu in western sector |
Geologic province: |
Uralian Orogen |
Geologic subprovince: |
Middle Urals |
Geologic district: |
Auerbakh-Krasnoturinsk (Serov) |
Commodities: |
Fe; Cu |
Mineralization styles: |
massive magnetite lenses; disseminated around massive bodies |
Geological ages: |
Early Devonian - Middle Devonian (host rocks) Middle Devonian (mineralization) |
Tectonic setting: |
continental marginal orogenic belt-back-arc; convergent; Formal name: Tagil-Tourin Active Margin (host rocks) |
Coincident features: |
intrusive contact (contact dips steeply to the east; ore bodies in the highly altered contact zone); Coincident feature name: Peschansk Diorite Massif block faulting (controlled by major tectonic fractures; some blocks uplifted and others depressed); Coincident feature name: post-collisional faulting |
Regional tectonic structure: |
collision zone of the East European and Siberian Plates, east of Uralian Suture (eastward subduction during Devonian formed the host volcano-plutonic complex ) Tectonic structure name: Northern Island Arc-Continental Sector |
Host rocks: |
(1) metamorphic; unclassified metamorphic rocks (Lower Devonian); Depositional setting: continental; Metamorphic grade: lower amphiboliteExternal host rock forms: | crystalline, coarse | Host rock protoliths: | limestone (Lower unit of host sequence dipping moderately to the west; intrsuvie contact dips 60° to E); Host rock protolith name: unit of Auerbakh-Krasnoturinsk belt | Internal host rock structures: | banding | Individual lithologies: | marble (marmorized limestone; overlain by interbedded tuffite, sandstone and shale, with limestone seams) | Host rock stratigraphy: | unit of Auerbakh-Krasnoturinsk belt |
(2) volcanic; intermediate volcanic rocks (upper part of the host sequence); Magma series/sedimentary package/metamorphic group: calc-alkaline; Metamorphic grade: lower amphiboliteExternal host rock forms: | flows | Host rock protoliths: | intermediate volcanics (subduction-related volcanic rocks); Host rock protolith name: andesitic porphyries | Internal host rock structures: | tuffite | Individual lithologies: | andesite (hornblende-plagioclase porphyritic flows) | Host rock stratigraphy: | andesitic porphyries |
(3) intrusive; gabbro-diorite suite (intrusion related to andesitic porphyries); Magma series/sedimentary package/metamorphic group: calc-alkaline; Depositional setting: continental arc; Metamorphic grade: greenschistExternal host rock forms: | crystalline, coarse | Host rock protoliths: | diorite (northwestern part of the Auerbabakh intrusive complex; in subduction-related magnatic arc); Host rock protolith name: Peschansk Diorite Massif | Individual lithologies: | diorite (related to the Lower Devonian andesitic porphyries in the host sequence) | Host rock stratigraphy: | Peschansk Diorite Massif |
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Related igneous rocks: |
(1) intrusive; granodiorite-tonalite-diorite suite (intrusive into andesite-limestone sequence); Initials: Auerbakh Intrusive Complex; Magma series: calc-alkaline; Depositional setting: continentalIndividual lithologies: | diorite-quartz diorite-granodiorite (large granodiorite at core of the northwest-trending complex; surrounded by elongate diorite bodies; a quartz diorite pluton to the northwest) |
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Metallogenic signatures: |
Fe Cu |
Alteration signatures: |
scapolitization: pyroxene-garnet; What was altered: limestone and associated rocks albitization: albite; What was altered: andesitic porphyries chloritization: chlorite; What was altered: intermediate igneous rocks epidotization: epidote; What was altered: fault zones |
Mineralogy: |
(alteration): garnet, pyroxene, albite, epidote, chlorite, hematite, limonite (gangue): carbonate (mineralization): magnetite, chalcopyrite |
Deposit shape: |
lensoidDeposit dimensions: | strike length: 1,700 metres length down-dip: 600 metres thickness: 80 metres |
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Qualified comments: |
(Applies to: reserve/resource descriptions) 6 lensoid ore bodies and 11 sub-economic deposits along a 10 km belt; Vorontsovka at south end found in 1980; reserves in 1977: 173 Mt grading 48.5 to 54 % Fe in 4 sectors; 0.61 % Cu in western sector; Northern Peschansk deposit: 1700 m long, 270 to 900 m deep and 80 m thick; New Peschansk main body 2 km north: 760 x 440 x 63 m; Southern deposit 1.5 km south has 3 layers upto 400 m long, 64 m thick
(Applies to: discovery and development) Open pits of Northern and Southern Peschansk deposits mined out; underground mining of Northern Peschansk since 1968; New Peschansk developed in 1970s; production 1955-1979: 40 Mt of ore (21 Mt Fe); |
References: |
Anonymous, 1977 |
Union of Soviet Socialist Republics |
in The Iron Ore Deposits of Europe and Adjacent Areas: Explanatory Notes to the International Map of the Iron Ore Deposits of Europe, 1:2,500,000 (Lists and Tables), Edited by Zitzmann, A., International Geological Congress, Commission for the Geological Map of the World, Subcommission for the Metallogenic Map of the World, Bundesanstalt fur Geowissenschaften und Rohstoffe, Postfach 51 01 53, D-3000 Hannover 51, Volume II, 386 p, p. 218 - 283 |
Fershtater, G. B.; Monetero, P.; Borodina, N. S.; Pushkarev, E. V.; Smirnov, V. N.; Bea, F., 1997 |
Uralian Magmatism: An Overview |
Tectonophysics, Volume 276, p. 87 - 102 |
Herrington, R.; Smith, M.; Maslennikov, V.; Belogub, E.; Armstrong, R., 2002 |
A Short Review of Paleozoic Hydrothermal Magnetite Iron-Oxide Deposits of the South and Central Urals, and their Geological Setting |
Section Eurasia and Africa, in Hydrothermal Iron Oxide Copper-Gold and Related Deposits: A Global Perspective, Volume 2, Edited by Porter, T. M., Australian Mineral Foundation, Adelaide, Australia, PGC Publishing, Adelaide, 377 p, p. 343 - 354 |
Koroteev, V. A.; de Boorder, H.; Necheukhin, V. M.; Sazonov, V. N., 1997 |
Geodynamic Setting of the Mineral Deposits of the Urals |
Tectonophysics, Volume 276, p. 291 - 300 |
Sokolov, G. A.; Grigor'ev, V. M., 1977 |
Deposits of Iron |
in Ore Deposits of the USSR, Volume 1, Edited by Smirnov, V. I., Academy of Science, the Union Soviet Socialist Republics, Pitman Publishing Ltd., Pitman House, 39 Parker Street, London WC2B 5PB, U. K., 352 p, p. 7 - 113 |
Zitzmann, A., 1977 |
The Iron Ore Deposits of the Western U. S. S. R. |
Section The Iron Ore Deposits of Europe and Adjacent Areas, in The Iron Ore Deposits of Europe and Adjacent Areas: Explanatory Notes to the International Map of the Iron Ore Deposits of Europe, 1:2,500,000 (Text and Figures), Edited by Walther, H. W.; Zitzmann, A., International Geological Congress, Commission for the Geological Map of the World, Subcommission for the Metallogenic Map of the World, Bundesanstalt fur Geowissenschaften und Rohstoffe, Postfach 51 01 53, D-3000 Hannover 51, Volume I, 418 p, p. 325 - 391 |
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