Название |
Features of structural tectonics and geochemistry of Tomulakh metamorphism zone |
Информация об авторе |
Norilsk State Industrial Institute, Norilsk, Russia:
L. K. Miroshnikova, Professor, Doctor of Geological and Mineralogical Sciences, miroshnikova_lk@mail.ru A. Yu. Mezentsev, Assistant, Post-Graduate Student N. V. Semenyakina, Assistant, Post-Graduate Student
Vinogradov Institute of Geochemistry, Siberian Branch, Russian Academy of Sciences, Irkutsk, Russia: O. M. Glazunov, Professor, Doctor of Geological and Mineralogical Sciences |
Реферат |
The methods of geological and geochemical modeling for prospecting of mineralization in areas associated with the deposits of the Talnakh ore-forming system are considered. The geological and geochemical model is based on the geological and structural analysis of the spatial relationships of geochemical anomalies, which allows us to quantify the geochemical types of halos caused by both the multi-stage formation of deposits and the presence of different types of mineralization, which contributes to solving the forecasting problems. The subject of the study is the anomalous Tomulakh metamorphism zone (TMZ), the tectonic conditions of its formation, the material composition of metamorphic and metasomatic formations and facies, and their geochemical expression. The TMZ, located in the north of the ore-bearing Kharaelakh intrusive of the Talnakh ore-magmatic system, is traced along the Axial-Dyangin fault. The high density of faulting and the composition of the tectonic breccias in the upper exocontact zone ensure propagation of metamorphosing fluids over a considerable distance in the vertical and lateral directions. Within the TMZ, which is the flank part of the fluid-magmatic system, fluids evolve in space and time from alkaline to acidic. Alkaline and acidic near-fracture metasomatites developing along tectonic breccias are marked by the geochemical associations Y-Mo-Zr and Be-Mo-Zr. Ore mineralization in the form of rare scattered inclusions of pyrite, chalcopyrite, pyrrhotite, and sphalerite is mapped by the Zn-Cu-Ni-Co specialization. The development of ore mineralization in the contact-metamorphosed rocks of the upper Devonian TMZ is considered as a continuation of the contact halo of the Ni-Cu-Co specialization of the Kharaelakh intrusive. Calciteanhydrite metasomatites (americophile) and anhydrite marble in the top exocontact TMZ occur in the zone of dispersed mineralization and Sr anomalies traceable along the Axial-Dyingin fault and being the extension of the contact envelope of the Kharaelakh intrusion. It is assumed that the TMZ is formed under the influence of the fluid-magmatic Talnakh ore-forming system. |
Библиографический список |
1. Grigorov S. A. Reflection of ore formation system in the geochemical field as an object of geochemical research. Razvedka i okhrana nedr. 2009. No. 5. pp. 8–13. 2. Gushchin A. V., Gusev G. S. Problems of volcanic complexes geochemical specialization in connection with reference geodynamic settings. Razvedka i okhrana nedr. 2015. No. 6. pp. 37–42. 3. Kremenetskiy A. A. Prospecting geochemistry: state, problems, approaches. Razvedka i okhrana nedr. 2008. No. 4-5. pp. 4–13. 4. Nikolaev Yu. N. Estimation of regional mineral resources on the basis of geological and geochemical models of ore districts and clusters. Razvedka i okhrana nedr. 2010. No. 5. pp. 42–48. 5. Ryabov V. V., Yushko N. A. Primary geochemical envelopes in copper–nickel deposits in the Pechenga and Norilsk ore provinces. Problems of the Minerageny, Economic Geology and Mineral Resources : Scientific-Literary Anthology (Smirnow Collection–2019). Moscow : Max Press, 2019. Vol. 1. pp. 219–244. 6. Turovtsev D. M. Contact metamorphism of Norilsk intrusions. Moscow : Nauchnyi mir, 2002. 318 p. 7. Tarasova I. G. Analysis of raw materials and processing products in nonferrous metallurgy. Tsvetnye Metally. 2021. No. 3. pp. 66–70. 8. Kogan B. S. Physical basis of computer-aided geochemical field modeling. Razvedka i okhrana nedr. 1996. No. 8. pp. 7–14. 9. Kogan B. S., Ginzburg L. N., Burenkov E. K., Reznikov I. N., Evseev V. A. Guidelines on GEOSKAN-200 application in computer processing of heterogeneous geochemical information. Moscow : IMGRE, 1989. 44 p. 10. Fedorenko V. A. Tectonic control of magmatism and physical layout patterns of nickel-bearing areas in the north-west of Siberian Platform. Russian Geology and Geophysics. 1991. Vol. 32, No. 1. pp. 48–56. 11. Barnes H. L. Hydrothermal Processes: The Development of Geochemical Concepts in the Latter Half of the Twentieth Century. Geochemical Perspectives. 2015. Vol. 4, No. 1. pp. 1–93. 12. Radko V. A. The facies of intrusive and effusive magmatism in the Norilsk region. Saint-Petersburg : Kartograficheskaya fabrika VSEGEI, 2016. 226 p. 13. Korzhinsky D. S. The advancing wave of acidic components in ascending solutions and hydrothermal acid-base differentiation. Geochimica et Cosmochimica Acta. 1959. Vol. 17, Iss. 1-2. pp. 17–20. 14. Brugger J., Weihua Liu, Etschmann B., Yuan Mei, She rman D. M., Testemale D. A review of the coordination chemistry of hydrothermal systems, or do coordination changes make ore deposits? Chemical Geology. 2016. Vol. 447. pp. 219–253. 15. Iacono-Marziano G., Ferraina C., Gaillard F., Di Carlo I., Arndt N. T. Assimilation of sulfate and carbonaceous rocks: Experimental study, thermodynamic modeling and application to the Noril’sk-Tal nakh region (Russia). Ore Geology Reviews. 2017. Vol. 90. pp. 399–413. 16. Lightfoot P. C. Nickel Sulfide Ores and Impact Melts Origin of the Sudbury Igneous Complex. Amsterdam : Elsevier, 2017. 662 p. 17. Borovikov A. A., Bulbak T. A., Borisenko A. S., Ragozin A. L., Palesskiy S. V. The behavior of ore elements in oxidized heterophase chloride and carbonate–chloride–sulfate fluids of porphyry Cu–Mo(Au) deposi ts (from experimental data). Russian Geology and Geophysics. 2015. Vol. 56, Iss. 3. pp. 435–445. 18. Borovikov A. A., Goverdovskiy V. A., Borisenko A. S., Bryanskiy N. V., Shabalin S. I. Composition and metal contents of ore-forming fluids of the Kalguty Mo-W(Be) deposit (Gorny Altai). Russian Geology and Geophysics. 2016. Vol. 57, Iss. 4. pp. 507–518. 19. Barnes S. J., Cruden A. R., Arndt N., Saumur B. M. The mineral system approach applied to magmatic Ni–Cu–PGE sulphide deposits. Ore Geology Reviews. 2016. Vol. 76. pp. 296–316. 20. Qih ai Shu, Yong Lai, Yi Sun, Chao Wang, Shu Meng. Ore Genesis and Hydrothermal Evolution of the Baiyinnuo’er Zinc-Lead Skarn Deposit, Northeast China: Evidence from Isotopes (S, Pb) and Fluid Inclusions. Economic Geology. 2013. Vol. 108, No. 4. pp. 835–860. 21. Miroshnikova L. K., Mezentsev A. Yu., Semenyakina N. V., Kotelnikova E. M. Geological and geochemical signs and criteria of potential mineralization in the Tangaralakh intrusion. GIAB. 2020. No. 6. pp. 115–130. 22. Miroshnikova L. K. Investigations of the ore-geochemical zoning of the ore bodies of the Norilsk region deposits. Izvestiya vuzov. Geologiya i razvedka. 2014. No. 2. pp. 31–36. 23. Fu Bin, Sun WeiDong, Wang YuRong, Ding Xing, He JunJie. The effect of temperature and concentration on hydrolysis of fluorine-rich titanium complexes in hydrothermal fluids: Constraints on titanium mobility in deep geological processes. Acta Petrologica Sinica. 2015. Vol. 31, Iss. 3. pp. 802–810. |