Geological structure and mineralogy of the Mechnikovskoe gold deposit, thе Southern Urals
https://doi.org/10.24930/1681-9004-2019-19-1-111-138
Abstract
Subject. The article presents the results of study of Mechnikovskoe gold deposit associated with listvenites and beresites of the Miass region of the Southern Urals.
Materials and methods. Materials were sampled during the field work of 2010– 2012. The chemical composition of rocks is analyzed by methods of classical chemistry (rock-forming oxides) and ICP MS (trace elements). The mineral composition is determined on an electron microscope with EDS.
Results. The deposit is composed of tectonic sheets of serpentinites, carbonatized serpentinites and listvenites (sheet I), metadiabases and plagioclase metabasalts of the Irendyk Formation and beresites and volcanosedimentary rocks and metabasalts of the Karamalytash Formation (sheet II). In the central part of the deposit, the volcanic rocks are intruded by a dike of finegrained island-arc granites. Chromites of serpentinites are characterized (on average) by high Cr# (89) and low Mg# (29) values and low contents of Al2O3 (6.94 wt %) and MgO (5.5 wt %). Gold-bearing rocks include listvenites, beresites and carbonaceous shales. The major ore mineral is pyrite; accessory minerals are Au and Ag minerals, chalcopyrite, fahlores, galena, sphalerite, pyrrhotite, cubanite, vaesite, melonite, secondary copper sulfides, barite, rutile, monazite and xenotime. Gold of the deposit contains low Ag contents (3.52 wt %) and minor amount of Cu and Hg (<1 wt % in most analyses).
Conclusions. The listvenites and beresites of the deposit were formed after ultramafic and mafic rocks, respectively. The discovery of gold in various rocks indicates that gold mineralization was deposited after the formation of the geological structure of the deposit. The source of gold was most likely related to a magmatic fluid.
About the Authors
I. Yu. Melekestseva
Institute of Mineralogy, Urals Branch, of Russian Academy of Sciences,
Russian Federation
Miass, Chelyabinsk district 456317
Russian Federation
Miass, Chelyabinsk district 456317
V. V. Zaykov
Institute of Mineralogy, Urals Branch, of Russian Academy of Sciences
Russian Federation
Miass, Chelyabinsk district 456317
Russian Federation
Miass, Chelyabinsk district 456317
G. A. Tret’yakov
Institute of Mineralogy, Urals Branch, of Russian Academy of Sciences,
Russian Federation
Miass, Chelyabinsk district 456317
Russian Federation
Miass, Chelyabinsk district 456317
K. A. Filippova
Institute of Mineralogy, Urals Branch, of Russian Academy of Sciences
Russian Federation
Miass, Chelyabinsk district 456317
Russian Federation
Miass, Chelyabinsk district 456317
V. A. Kotlyarov
Institute of Mineralogy, Urals Branch, of Russian Academy of Sciences
Russian Federation
Miass, Chelyabinsk district 456317
Russian Federation
Miass, Chelyabinsk district 456317
References
1. Arai S. (1992) Chemistry of chromian spinel in volcanic rocks as a potential guide to magma chemistry. Min. Mag., 56, 173-184.
2. Artem’ev D.A., Ankusheva N.N. (2014) Formation conditions of gold-sulfide-quartz mineralization of the Murashkina Gora deposit (Miass gold region, the Southern Urals). Metallogeniya drevnikh i sovremennykh okeanov-2014. Dvadtsat’ let na peredovykh rubezhakh geologii mestorozhdenii poleznykh iskopaemykh [Metallogeny of ancient and modern oceans-2014. Twenty years at the frontier of geology of mineral deposits]. Miass: IMin UrO RAN, 142-146. (In Russian)
3. Artem’ev D.A., Blinov I.A., Ankushev M.N. (2013) Native gold of Murashkina Gora listvenite-related gold deposit (South Urals). Materialy III Mezhdunarodnoi nauchno-prakticheskoi konferentsii molodykh uchenykh i spetsialistov pamyati akademika A.P. Karpinskogo [Proc. IIId Intern. Conference of young scientists in memory of Academician A.P. Karpinsky]. St.Petersburg, VSEGEI Publ., 183-187 (In Russian)
4. Artem’ev D.A., Krainev Yu.D., Zaykov V.V. (2014) Mineralogy of the Borisovskie Zhily gold deposit (Miass region, the Southern Urals). Metallogeniya drevnikh i sovremennykh okeanov-2014. Dvadtsat’ let na peredovykh rubezhakh geologii mestorozhdenii poleznykh iskopaemykh [Metallogeny of ancient and modern oceans-2014. Twenty years at the frontier of geology of mineral deposits]. Miass: IMin UrO RAN, 137-142. (In Russian)
5. Belogub E.V., Melekestseva I.Yu., Novoselov K.A., Zabotina M.V., Tret’yakov G.A., Zaykov V.V., Yuminov A.M. (2017) Listvenite-related gold deposits of the South Urals (Russia): a review. Ore Geol. Rev., 85, 247-270.
6. Berkenbosch H.A., de Ronde C.E.J., Gemmel J.B., McNeil A.W., Goemann K. (2012) Mineralogy and formation of black smoker chimneys from Brothers submarine volcano, Kermadec Arc. Econ. Geol., 107, 1613-1633.
7. Borodaevskii N.I. (1948) Types of gold deposits related to ultramafic rocks of the Miass and Uchaly regions of the Southern Urals). 200 let zolotoi promyshlennosti Urala [The 200th anniversary of gold industry of the Urals]. Sverdlovsk: UFAN SSSR Publ., 316-330. (In Russian)
8. Bortnikov N. S. (2006) Geochemistry and origin of the oreforming fluids in hydrothermal-magmatic systems in tectonically active zones. Geol. Ore Dep., 48(1), 1-22.
9. Choi S.H., Shervais J.W., Mukasa S.B., 2008. Suprasubduction and abyssal mantle peridotites of the Coast Range ophiolite, California. Contrib. Mineral. Petrol., 156, 551–576.
10. Chvileva T.N., Bezsmertnaya M.S., Spiridonov E.M., Agroskin A.S., Papayan G.V., Vinogradova R.A., Lebedeva S.I., Zav′yalov E.N., Filimonova A.A., Petrov V.K., Rautian L.P., Sveshnikova O.L. (1988) Spravochnikopredelitel’ rudnykh mineralov v otrazhennom svete [Manual for identification of ore minerals in reflected light]. Leningrad, Nedra Publ., 503 p. (In Russian)
11. de Ronde C.E.J., Massoth G.J., Butterfield D.A., Christenson B.W., Ishibashi J., Ditchburn R.G., Hannington M.D., Brathwaite R.L., Lupton J.E., Kamenetsky V.S., Graham I.J., Zellmer G.F., Dziak R.P., Embley R.W., Dekov V.M., Munnik F., Lahr J., Evans L.J., Takai K. (2011) Submarine hydrothermal activity and gold-rich mineralization at Brothers Volcano, Kermadec Arc, New Zealand. Miner. Dep., 46, 541-584.
12. Dick H.J.B., Bullen T. (1984) Chromian spinel as a petrogenetic indicator in abyssal and alpine-type peridotites and spatially associated lavas. Contrib. Mineral. Petrol., 86, 54-76.
13. Fershtater G.B. (2001) Granitoid magmatism and formation of continental crust during evolution of the Uralian orogen. Litosfera, (1), 62-85.
14. Fershtater G.B., Kholodnov V.V., Krasnobaev A.A., Borodina N.S., Zin’kova E.A., Pribavkin S.V., Kremenetskii A.A. (2010) Au-bearing gabbro-tonalite-granodiorite-granite plutons of the Urals: age, geochemistry, peculiarity of magmatic and ore evolution. Geol. Ore Deposits, 52(1), 58-76.
15. Goldfarb R.J., Groves D.I. (2015) Orogenic gold: common or evolving fluid and metal sources through time. Lithos, 233, 2-26.
16. Grichuk D.V. (2012) Thermodynamic model of ore-forming processes in a submarine island-arc hydrothermal system. Geochem. Intern., 50(13), 1069–1100.
17. Himmler T., Bach W., Bohrmann G., Peckmann J. (2010) Rare earth elements in authigenic methane-seep carbonates as tracers for fluid composition during early diagenesis. Chem. Geol., 277, 126-136.
18. Kontak D. J., Jackson S. J. (1999) Documentation of variable trace- and rare earth element abundances in carbonates from auriferous quartz veins in Meguma lode gold deposits, Nova Scotia. Can. Min., 37, 469-488.
19. Koronovskii N.V., Demina L.I. (2011) Magmatism kak indicator geodinamicheskikh obstanovok [Magmatism as an indicator of geodynamic settings]. Moscow, KDU Publ., 234 p. (In Russian)
20. Kosarev A.M., Puchkov V.N., Seravkin I.B. (2005) Petrological-geochemical features of the Early Devonian-Eifelian island-arc volcanics of the Magnitogorsk zone in a geodynamic context. Litosfera, (4), 24-40. (In Russian)
21. Kosarev A.M., Puchkov V.N., Seravkin I.B. (2006) Petrological-geochemical peculiarites of Middle DevonianEarly Carboniferous island-arc and collision volcanites of Magnitigorsk zone in geodynamic context. Litosfera, (1), 3-21. (In Russian)
22. Kuraev N. (1929) Geological studies of listvenites of Miass region and related primary gold deposits. Izvestiya Geologicheskogo komiteta, Vyp. 79. (In Russian)
23. Maslov V.A., Salikhov D.N. (2015) A problem of formation of the Irendyk Formation of the West Magnitogorsk zone, the Southern Urals). Litosfera, (6), 26-35. (In Russian)
24. Medvedeva E.V., Nemov A.B., Kotlyarov V.A. (2015) Mafic and intermediate metasomatites of the Nyashevo serpentinite massif (Ilmeny Mountains, the Southern Urals). Litosfera, (6), 53-68. (In Russian)
25. Melekestseva I.Yu., Maslennikov V.V., Tret’yakov G.A., Nimis P., Beltenev V.E., Rozhdestvenskaya I.I., Maslennikova S.P., Belogub E.V., Danyushevsky L., Large R., Yuminov A.M., Sadykov S.A. (2017) Gold- and silverrich massive sulfides from the Semenov-2 hydrothermal field, 13°31.13´ N, Mid-Atlantic Ridge: A case of magmatic contribution? Econ. Geol., 112(4), 741-773.
26. Melekestseva I.Yu., Yuminov A.M. (2015) Formation conditions of gold-quartz veins of the Mechnikovskoe and Altyn-Tash deposit, South Urals: result of fluid inclusion and isotopic studies. Mineralogiya, (2), 58-67. (In Russian)
27. Moss R., Scott S.D. (2001) Geochemistry and mineralogy of gold-rich hydrothermal precipitates from the Eastern Manus Basin, Papua New Guinea. Can. Min., 39, 957-978.
28. Nadeau O., Cayer A., Pelletier M., Stevenson R., Jébrak M. (2015) The Paleoproterozoic Montviel carbonatite-hosted REE–Nb deposit, Abitibi, Canada: Geology, mineralogy, geochemistry and genesis. Ore Geol. Rev., 67, 314-335.
29. Pavlov N.V. (1949) Khimicheskii sostav khromspinelidov v svyazi s khimicheskim sostavom porod ul’traosnovnykh intruzivov [Chemical composition of chromites related to the chemical composition of ultramafic rocks]. Trudy instituta geologicheskikh nauk. Vyp. 108. Seriya rudnykh mestorozhdeniy, 18, 91 p. (In Russian)
30. Petersen S., Herzig P.M., Hannington M.D., Jonasson I.R., Arribas A.Jr. (2002) Submarine gold mineralization near Lihir Island, New Ireland fore-arc, Papua New Guinea. Econ. Geol., 97, 1795-1813.
31. Popova E.S., Zaykov V.V., Murzin V.V. (2005) Minerals of gold and silver in ores from the Melent’evka gold polymetallic deposit. Ural’skii mineralogicheskii sbornik № 13. Miass: IMin UrO RAN, 146-156. (In Russian).
32. Puchkov V.N. (2000) Paleogeodinamika Yuznogo i Srednego Urala [Paleogeodynamics of the Southern and Middle Urals]. Ufa: Dauriya Publ., 146 p. (In Russian)
33. Puchkov V.N. (2017) General features relating to the occurrence of mineral deposits in the Urals: What, where, when and why. Ore Geol. Rev., 85, 4-29.
34. Rose G. (1837) Mineralogisch-geognostische Reise nach dem Ural, dem Altai and dem Kaspischen Meere. Volume 1: Reise nach dem nördlichen Ural and dem Altai. Berlin, C.V. Eichhoff Verlag der Sanderschen Buchhandlung, 633 p.
35. Rozhkov I.S., Abdrakhimov K.Z. (1948) Melent’evka deposit. 200 let zolotoi promyshlennosti Urala [The 200th anniversary of gold industry of the Urals]. Sverdlovsk: UFAN SSSR, 331-341. (In Russian)
36. Savel’ev D.E. (2013) [Composition of accessory chromites from ultramafic rocks of the South Urals as indicator of geodynamic setting of massifs]. Vestnik Perm Univ. Geologiya, 18(1), 17-25. (In Russian)
37. Savel’ev D.E., Snachev V.I., Savel’eva E.N., Bazhin E.A. (2008) Geologiya, petrogeochimiya i khromitonosnost’ gabbro-giperbazitovykh massivov Yuznogo Urala [Geology, petrogeochemistry and chromite potential of gabbro-ultramafic massifs of the South Urals]. Ufa: DizaynPoligrafServis Publ., 320 p. (In Russian)
38. Sazonov V.N., Murzin V.V., Ogorodnikov V.N., Volchenko Yu.A. (2002) Gold mineralization related to Alpinetype ultramafic rocks. Litosfera, (4), 63-77. (In Russian).
39. Sazonov V.N., Ogorodnikov V.N., Koroteev V.A., Polenov Yu.A. (2001) Mestorozhdeniya zolota Urala [Gold deposits of the Urals]. Yekaterinburg: UGGA Publ., 622 p. (In Russian)
40. Seravkin I.B. (1986) Vulkanizm I kolchedannye mestorozhdeniya Yuzhnogo Urala [Volcanism and massive sulfide deposits of the Southern Urals]. Moscow, Nauka Publ., 268 p. (In Russian)
41. Seravkin I.B., Kosarev A.M., Rodicheva Z.I. (2003) Criteria of difference of volcanic complexes of the western wing of the Magnitogorsk megasynclinorium according geological, petrochemical and geochemical data. Geologicheskii sbornik No. 3. Ufa, IG UNTs RAN, 120-129. (In Russian)
42. Sun S.-S., McDonough W. F. (1989) Chemical and isotopic systematics of oceanic basalts: implications for mantle composition and processes. Geol. Soc. Spec. Publ., London, 42, 313-345.
43. Sun S.-S., Nesbitt R.W. (1978) Petrogenesis of Archaean Ultrabasic and Basic Volcanics: Evidence From Rare Earth Elements. Contrib. Mineral. Petrol., 65, 301-325.
44. Zaykov V.V. (1988) Melent’evka polymetallic deposit of Miass region. Materialy k mineralogii rudnykh raionov Urala [Data on mineralogy of ore districts of the Urals]. Sverdlovsk, UrO RAN SSSR, 74-79. (In Russian)
45. Zaykov V.V. (2006) Vulkanizm I sul’fidnye kholmy paleookeanicheskikh okrain [Volcanism and sulfide mounds of paleooceanic margins]. Moscow, Nauka Publ., 429 p. (In Russian)
46. Zaykov V.V., Melekestseva I.Yu., Zaykova E.V., Kotlyarov V.A., Kraynev Yu.D. (2017) Gold and platinum group minerals in placers of the South Urals: composition, microinclusions of ore minerals and primary sources. Ore Geol. Rev., 85, 299-320.
47. Zaykov V.V., Zhilin I.V., Kotlyarov V.A., Zaykov E.V. (2010). Native gold of the Kruglaya Gora iron deposit. Uralskaya mineralogicheskaya shkola-2010 [Proc. Uralian mineralogical school-2010]. Yekaterinburg: UrO RAN, 65-68. (In Russian)
48. Zharikov V.A., Pertsev N.N., Rusinov V.L., Callegari E., Fettes D.J. (2007) Metasomatism and metasomatic rocks. https://www.bgs.ac.uk/scmr/docs/papers/paper_9.pdf.
49. Zhilin I.V. (2006) Principles of occurrence of gold in skarn magnetite ores from the Kruglaya Gora deposit. Sbornik nauchnykh statei po materialam nauchno-prakticheskoi konferentsii [Proc. Scientific-practical conference] Chelyabinsk: Tsitsero Publ., 166-171. (In Russian)
Review
For citations:
Melekestseva I.Yu., Zaykov V.V., Tret’yakov G.A., Filippova K.A., Kotlyarov V.A. Geological structure and mineralogy of the Mechnikovskoe gold deposit, thе Southern Urals. LITHOSPHERE (Russia). 2019;(1):111-138. (In Russ.) https://doi.org/10.24930/1681-9004-2019-19-1-111-138
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