Abstract
The geological structure of the Kumak ore field is concidered. Special attention is paid to the carbonaceous shales of the Bredy formation (C1bd), which compose elongated submeridional blocks of the Anikhov Graben. Rocks are saturated with carbonaceous matter to varying degrees. According to chemical and thermogravimetric analyses, the content of Corg in them reaches 11.1%, which allows to classify the considered rocks as carbonaceous. It is shown that black shales fall into the fields of terrigenous-carbon and siliceous-carbon formations. Carbonaceous matter is represented by two types: weakly metamorphosed sapropel sedimentation-diagenetic and metamorphic graphite. Terrigenous high-alumina planting material underwent minimal transfer and was formed mainly due to the destruction of rocks of protophile composition, as well as the products of erosion of acidic volcanites at the Bredy formation section base. Sedimentation experienced a high degree of weathering that is characteristic for a humid climate with oxidative and partially sub-oxidative conditions. The deposition of material occurred in a transition from riftogenic to collisional geodynamic environment. Black-shale deposits of the Kumak ore field according to the parameter Na2O/K2O = 0.62 belong to the normal potassium formation type, which is typical for deposits with mainly gold-sulfide mineralization.
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References
Arifulov ChH (2005) Chernoslancevye mestorozhdenija zolota razlichnyh geologicheskih obstanovok. Rudy Met 2:9–19 (in Russian)
Cherepanov AA, Berdnikov NV, Shtareva AV, Krutikova VO (2017) Formation conditions and rare-earth mineralization of Riphean carbonaceous shales of the Upper Nyatygran subformation, Russian Far East. Rus J Pacific Geol 11(4):297–307. https://doi.org/10.1134/S1819714017040029
Gorbachjov OV, Sozinov NA (1985) Nekotorye petrohimicheskie i geohimicheskie aspekty tipizacii uglerodistyh otlozhenij dokembrija. Problemy osadochnoj geologii dokembrija 46–57 (in Russian)
Herron MM (1988) Geochemical classification of terrigenous sands and shales from core or log data. J Sediment Petrol 58:820–829. https://doi.org/10.1306/212F8E77-2B24-11D7-8648000102C1865D
Holodov VN, Naumov RI (1991) O geohimicheskih kriterijah pojavlenija serovodorodnogo zarazhenija v vodah drevnih vodoemov. Izv AS USSR Ser Geol 12:74–82 (in Russian)
Jones B, Manning DAC (1994) Comparison of geochemical indices used for the interpretation of paleoredoh conditions in ancient mudstones. Chem Geol 111:111–129. https://doi.org/10.1016/0009-2541(94)90085-H
Khanchuk AI, Nevstruev VG, Berdnikov NV, Nechaev VP (2013) Petrochemical characteristics of carbonaceous shales in the eastern Bureya massif and their precious-metal mineralization. Rus Geol Geophys 54(6):627–636. https://doi.org/10.1016/j.rgg.2013.04.012
Kolomoets AV, Pankrat’ev PV, Kisil’ RS, Panteleev VS (2019) Geology and gold mineralization of lower carboniferous fills of Kommercheskoye deposit (Kumakskoye ore field). Processy v geosredah 3(21):341–346 (2019) (in Russian)
Ljadskij PV, Chen-Len-Son BI, Alekseeva GA, Olenica TV, Kvasnjuk LN, Manujlov NV (2018) Gosudarstvennaja geologicheskaja karta Rossijskoj Federacii. Scale 1:200000, 2nd edn. Ser South-Urals. List M-41-I (Anihovka) ref. MF FGBU «VSEGEI», Moscow (in Russian)
Loshhinin VP, Pankrat’ev PV (2006) Zolotonosnost’ nizhne-srednepaleozojskih chernoslancevyh formacij Vostochnogo Orenburzh’ja. In: Mat annual sci session Mining Institute of UB RAS on res results in 2005 STRATEGIJA I PROCESSY OSVOENIJA GEORESURSOV, Perm, pp 79–82 (in Russian)
Nesbitt HW, Young GM (1982) Early Proterozoic climates and plate motions inferred from major element chemistry of lutites. Nature 299:715–717. https://doi.org/10.1038/299715a0
Novgorodova MI, Jakobs EI, Shinkarenko JuG (1981) Zolotoe orudenenie i metasomatity odnogo iz rajonov Juzhnogo Urala. Voprosy petrologii i metallogenii Urala, pp 115–116 (in Russian)
Parada SG (2002) O litogennoj prirode nekotoryh zolotorudnyh mestorozhdenij v uglerodisto-terrigennyh tolshhah. Litologija I Pol Iskop 3:275–288 (in Russian)
Roser BP, Korsch RJ (1988) Provenance signatures of sandstone–mudstone suites determined using discriminant function analysis of major-element data. Chem Geol 67:119–139. https://doi.org/10.1016/0009-2541(88)90010-1
Sazonov VN, Koroteev VA, Ogorodnikov VN, Polenov JuA, Ja VA (2011) Zoloto v “chernyh slancah” Urala. Litosfera 4:70–92 (in Russian)
Snachev AV, Rykus MV, Snachev MV, Romanovskaya MA (2013) A model for the genesis of gold mineralization in carbonaceous schists of the Southern Urals. Moscow Univ Geol Bul 68(2):108–117. https://doi.org/10.3103/S0145875213020105
Verma SP, Armstrong-Altrin JS (2013) New multi-dimensional diagrams for tectonic discrimination of siliciclastic sediments and their application to Precambrian basins. Chem Geol 355:117–133. https://doi.org/10.1016/jchemgeo201307014
Wignall PB, Myers KJ (1988) Interpreting the benthic oxygen levels in mudrocks: a new approach. Geology 16:452–455. https://doi.org/10.1130/0091-7613(1988)016%3c0452:IBOLIM%3e23CO;2
Yudovich YaE, Ketris MP (2015) Geohimija chernyh slancev. Direkt-Media, Moscow, Berlin. https://doi.org/10.23681/428042 (in Russian)
Znamenskij SE, Znamenskaja NM (2009) Klassifikacija zolotorudnyh mestorozhdenij vostochnogo sklona Juzhnogo Urala. Geologicheskij Sbornik 8:177–186 (in Russian)
Acknowledgements
Field work was supported by the Regional Grant in the domain of scientific and technical activities in 2019 (Agreement № 23 from 14.08.2019). The analytical assignment was carried out within the framework of the State assignment, theme No. 0246-2019-0078. The authors would like to thank S. A. Yagudina for the evaluation labor and E. O. Kalistratova for the tips in the rock sections describing.
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Kolomoets, A.V., Snachev, A.V. (2021). Geology and Petrogeochemical Features of the Kumak Ore Field Carbonaceous Shales. In: Chaplina, T. (eds) Processes in GeoMedia—Volume III. Springer Geology. Springer, Cham. https://doi.org/10.1007/978-3-030-69040-3_3
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