Petrogeochemistry and forming conditions of the Mesozoic volcanoplutonic formations in the Baleisky ore node
https://doi.org/10.24930/1681-9004-2020-20-1-106-118
Abstract
Research subject. In this research, volcanoplutonic formations (VPF) in the Baleisky ore node (BON) consisting of intrusions of the Amudzhikan-Shakhtama complex (J2-3) and comagmatic effusions of the Shadaron series (J2-3) were investigated.
Methods. Investigations were carried out in the analytical center of the SB RAS Geological (Ulan-Ude). Silicate analysis was performed by the conventional method. Ore and rare elements were determined by the RFA method. Rare earth elements were detected using the ASP-AES method.
Results. It was determined that VPF in the BON has a zonal structure. In the central parts of the BON, granite rods of the Amudzhikan-Shakhtama complex (J2-3) are located. Further, moving from the central BON parts towards its periphery, a belt of small intrusions of the Amudzhikan-Shakhtama complex (stocks of monzonite diorites, granodiorites, dikes of diorite porphyrites, lamprophyres) is located. The majority of gold deposits and ore occurrences are confined to this zone. The peripheral parts of the BON feature volcanogenic sedimentary deposits of the Shadaron series (J2-3). In composition, these deposits correspond to island-arc and post-col-lisional formations. It is shown that the intrusions of the Amudzhikan-Shakhtama complex correspond to high-potassium calc-alkaline series.
Conclusions. It was found that the magmatic melts of the Mesozoic ore-bearing intrusions located in the Baleisky deposit area are more differentiated and located at lower depths compared to the rocks of similar composition in other BON parts.
About the Author
B. N. Abramov
Institute of Natural Resources, Ecology and Cryology, SB RAS
Russian Federation
Russian Federation
16a Nedorezov st. Chita, 672014
References
1. Abramov B.N. (2016) Verkhne-Aliinsky gold deposit: Conditions of formation, petrogeochemical features of rocks and ores (Munginsk ore cluster, Eastern Transbaikalia). Litosfera, (4), 92-101. (In Russian)
2. Abramov B.N. (2012) Formation conditions, mineral and geochemical characteristics of rocks and ores of Sredne-Golgotaisk gold deposit (Eastern Transbaikalia). Izv. Vyssh. Uchebn. Zaved. Geol. Razved., (3), 79-82. (In Russian)
3. Abramov B.N. (2011) Conditions for the formation and ore potential of the fluid-explosive formations of gold deposits in the Eastern Transbaikalian region. Dokl. Earth Sciences, 440(1), 1197-1201.
4. Baleiskoe rudnoe pole [Baleiskoe ore field]. (1984), (Ed. N.P. Laverov). Moscow, TsNIGRI Publ., 271 p. (In Russian)
5. Borisenko A.S., Zhmodik S.M., Naumov E.A., Spiridonov A.M., Berzina A.N. (2010) Age limits of formation of gold mineralization in Eastern Transbaikalia. Materialy konferentsii “Samorodnoe zoloto: tipomorfizm mineral ’nykh assotsiatsii, usloviya obrazovaniya mestorozhdenii, zadachi prikladnykh issledovanii” [Materials of the conference “Native Gold: Typomorphism of Mineral Associations, Conditions for the Formation of Deposits, Problems of Applied Research”]. Moscow, IGEM RAS, 82-83. (In Russian)
6. Gordienko I.V., Kuzmin M.I. (1999) Geodynamics and Metallogeny of the Mongolian-Transbaikal Region. Geol. Geofiz, 40(11), 1545-1562. (In Russian)
7. Green T.H., Pearson N.J. (1986) Ti-rich accessory phase saturation in hydrous mafic-felsic compositions at high P-T. Grem. Geol., 54, 85-201.
8. Green T.H., Watson E.N. (1982) Crystallization of apatite in natural magmas under high pressure hydrous conditions, with particular reference to “orogenic” rocks series. Contrib. Miner. Petrol., 70, 96-105.
9. Frost B.R., Barnes C.G., Collins W.J., Arculus R.J., Ellis D.J., Frost C.D. (2001) A geochemical classification of granitic rocks. J. Petrol, 42(11), 2033-2045.
10. Interpretatsiya geokhimicheskikh dannykh. Uchebnoe po-sobie [The interpretation of geochemical data: a Training manual]. (2001) (Ed. E.V. Sklyarov). Moskow, Inter-met Engineering Publ., 288 p. (In Russian)
11. Konstantinov R.M., Thomson I.I., Cheglokov S.V., Kho-mich S.V., Andreeva M.G. (1967) Features of the zoning of mineralization in some ore nodes of Eastern Transbaikalia. Geol. Rudn. Mestorozhd., (3), 41-53. (In Russian)
12. Korol’kov A.T. (2011) Geodinamika zolotorudnykh raionov yugo-vostochnoi Sibiri. Abstract of dis. dokt. geol.-min. nauk [Geodynamics of gold ore regions of the south-eastern Siberia. Dr. geol. and miner. sci. diss.]. Irkutsk, 53 p.
13. Kostitsyn Yu.A. (2000) Accumulation of rare elements in granites. Nature, 92, 26-34.
14. Maksimov S.S. (1968) About the breccia bodies of the Baleisky ore region. Materialy konf. “Geologiya i razvedka mestorozhdenii poleznykh iskopaemykh Zabaikal’ya... [Materials of the conference “Geology and exploration of mineral deposits of the Baikal region”]. Chita, 35. (In Russian)
15. Pertsev A.V., Galperov G.V., Antipov V.S. Nikol’skii V.S., Strel’nikov S.I., Turchenko S.I. (2000) The cosmic image of Russia: the unique minerageny of the largest lineaments. Otech. Geol., (6), 29-33.
16. Pistsov Yu.P., Maksimov S.S. (1988) Geological and genetic model of noble ore formation on the example of the Baleysky ore field (Eastern Transbaikalia). Geol. Geofiz., (11), 89-98. (In Russian)
17. Seravkin I.V., Kosarev A.M., Salikhov L.I. et al. (1990) Vul-kanizm Yuzhnogo Urala [Volcanism of the Southern Urals]. Moscow, Nauka Publ., 197 p. (In Russian)
18. Sinitsa S.M., Vilmova E.S. Stratigraphy, paleontology and paleoreconstruction of the upper Mesozoic of the Baleysky ore field. Materialy konferentsii “Geologiya i metallogeniya Zabaikal’ya” [Materials of the conference “Geology and mineragenia of Transbaikalia”]. Chita, FGUGP Publ., 2010, 83-87. (In Russian)
19. Spiridonov A.M., Zorina L.D., Kitaev N.A. (2006) Zolotonosnye rudno-magmaticheskie sistemy Zabaikal’ya [Gold-Bearing ore-magmatig systems of Transbaikalia]. Novosibirsk, Geo Publ., 291 p. (In Russian)
20. Spiridonov A.M., Zorina L.D., Letunov S.P., Prokof’ev VY. (2010) The fluid regime of ore formation in the Balei gold-bearing ore-magmatic system (Eastern Transbaikalia, Russia). Russ. Geol. Geophys, 51(10), 1102-1109.
21. Velikoslavinskii S.D., Krylov D.P. (2015) Geodynamic setting of magmatic rocks of medium composition according to geochemical data. Petrology, 23(5), 451-458. (In Russian)
22. Vinokurov S.F. Europium anomalies in the ore deposits and their geochemical significance. Dokl. Akad. Nauk, 346(6), 792-795. (In Russian)
23. Zonenshain L.P., Kuzmin M.I., Natapov L.M. (1990) Tek-tonika litosfernykh plit territorii SSSR. Kn. 1 [Tectonics of lithospheric plates of the USSR territory. Book 1]. Moscow, Nedra Publ., 1990, 328 p. (In Russian)
24. Zorin Yu.A., Belichenko V.G., Rutshtein I.G., Zorina L.D., Spiridonov A.M. (1998) Geodynamics of the western part of the Mongol-Okhotsk belt and the tectonic position of ore occurrences of gold in Transbaikalia Geol. Geofiz., 39(11), 104-112. (In Russian)
Review
For citations:
Abramov B.N. Petrogeochemistry and forming conditions of the Mesozoic volcanoplutonic formations in the Baleisky ore node. LITHOSPHERE (Russia). 2020;20(1):106-118. (In Russ.) https://doi.org/10.24930/1681-9004-2020-20-1-106-118
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