Characteristics of geophysical fields and geophysical signs of mineralization in the Bukantau Mountains in the Southern Tien-Shan
1 Ministry of Mining and Geology of the Republic of Uzbekistan, University of Geological Sciences, State institution. “Institute of Mineral Resources”, Uzbekistan 64, Olimlar str., Tashkent, 100041
2 Institute of Seismology named after G.A. Mavlyanov, Academy of Sciences of the Republic of Uzbekistan 3, Zulfiyakhonim str., Tashkent, 100128
DOI: 10.33677/ggianas20240200128
Summary
The Bukantau Mountains are located in the northwestern part of the Southern Tien Shan folded gold ore belt. In geodynamic zoning, the Bukantau Mountains are divided into the North Bukantau and the South Bukantau structural-formational zones (SFZ). They are complexly curved uplifts complicated by smaller folds. The ores of the North Bukantau SFZ form copper-zinc-pyrite with gold (Karamurun), gold-sulfide-quartz (Irlir, Dzhetymtau) and secondary copper-molybdenum-skarn (Orazaly I, II) and chromite formations. The main ore deposits of the South Bukantau SFZ are rare metal-gold ore (Altyntau deposit), gold-arsenic (Kokpatas deposit), gold-polymetallic (Turbay deposit), gold-silver (Okzhetpes deposit) mineralization, tungsten-bearing skarns and skarnoids (Sautbay deposit).
The paper contains an analysis of long-term data from complex geophysical studies of the Bukantau Mountains. The characteristics of changes in the values of the physical field of 63 objects in the Bukantau Mountains were analyzed and complexes of geophysical features and relationships with the localization of mineralization were created.
The search criteria were formulated based on a study of the features of physical fields characteristic of known ore occurrences and deposits, from the point of view of the degree of unambiguity of their reflection in electric, gravitational and magnetic fields. Comparison of remote sensing data, geophysical and geochemical data using static and metallogenic analyses made it possible to determine predictive and promising positions, confirmed by field interpretation and driving of mine workings, recommended for further geological exploration work.
Keywords: Deposits, endogenous processes, gold, structure, formation, geophysical fields, intrusive rocks
REFERENCES
Borisov O.M., Glukh A.K. Ring structures and lineaments of Central Asia. Fan. Tashkent, 1982, 122 p. (in Russian).
Dementenko L.I., Kinderova L.P. Allocation of priority forecast areas for gold and other minerals within the Bukantau Mountains based on the creation and processing of a database of geological, geophysical, geochemical and remote sensing information using field zoning methods and computer forecasting technologies for 2004-2007. Project report. State Geological Fund. Tashkent, 2007, 164 p. (in Russian).
Glukh A.K. et al. Remote maps are the basis of metallogenic and predictive studies. Geology and Mineral Resources, No. 3, 2002, pp. 28-32 (in Russian).
Goipov A.B. Automated lineament analysis in the Lessa program in order to identify structural factors of mineralization in the Bukantau mountains. Bulletin of NUUz, No. 3/1, 2021, pp. 161-167 (in Russian).
Goipov A.B., Akhmadov Sh.I., Movlanov Zh.Zh. The study of mineralized zones of the Bukantau mountains from satellite images in the short-wave infrared range. Mining Journal of Kazakhstan, No. 8, 2020, pp. 10-14 (in Russian).
Goipov A.B., Khasanov N.R., Akhmadov Sh.I. Study of the mineralized zones of the Bukantau mountains on space images in the short-wave infrared range. Journal of Critical Reviews, Vol. 7, No. 06, 2020a, pp. 2070-2074.
Goipov A.B., Rakhmatovich K.N., Axmadov S.I., Musaxonov Z.M. Application of ratio bands of space images for mapping minerals on the example of Kokpatas-Okzhetpes trend in Mountain Bukantau (South Tien Shan). The American Journal of Applied Sciences, Vol. 2, No. 07, 2020b, pp. 94-103, DOI:10.37547/tajas/Volume02Issue07-16.
Isakhodzhaev B.A., Tangirov A.I., Urunov B.N. Boztau-Kokpatas-Okzhetpessky trend. Scientific and practical journal “Geology and mineral resources”, Tashkent, No. 6, 2013, pp. 23-30 (in Russian).
Kremnev I.G. Complex interpretation in the "Target Forecast" system of the Russian Academy of Sciences, Irkutsk, 1992 (in Russian).
Kremnev I.G. Mapping of the anomalous magnetic field and gravimetric map scale 1: 500000 - 1:1000000 of the territory of the Republic of Uzbekistan for 2004-2005, Geolfond RUz, 2005 (in Russian).
Kremnev I.G. Principles of allocation structures of physical fields according airborne geophysical surveys, Tashkent, "FAN" of the Uzbek SSR, No. 6, 1981, p. 49-52 (in Russian).
Krikunova L.M., Zahidov A.R., Gafurbekov A.A. Geological and industrial types of iron ores of Uzbekistan. SE "NIIMR". Tashkent, 2012, 100 p. (in Russian).
Kuznetsov O.L., Muravyev V.V. Physical and geological nature of concentric-zonal remote sensing objects. Overview, General and reg.geol. All-Union Research Institute of Economics of Mineral Raw Materials and Geological Exploration. 1986, 40 p. (in Russian).
Maksudov S. Kh., Kremnev I.G., Rustamov A.I., Smirnov A.N., Tuichiev A.I., Yusupov V.R. Preliminary results of high-precision magnetic exploration in the territory of Eastern Bukantau. In: "Actual problems of geology, geophysics and metallogeny", Tashkent, 2015, pp.43-46 (in Russian).
Maksudov S. Kh., Pak V.A., Karimova G.G., Umarova M.E., Juraev I. Some results of the use of high-precision magnetic prospecting to identify ore objects on the Yertashsai square in the Angren district. Geol. and Mineral Resources, No. 3, 2010, pp. 17-20 (in Russian).
Maksudov S.Kh., Tuichiev A.I., Yusupov V.R., Kremnev I.G., Rustamov A.I., Smirnov A.N. Results of high-precision magnetic survey on the territory of Eastern Bukantau. International Scientific and Technical Conference “Integration of science and practice as a mechanism for effective development of the geological industry of the Republic of Uzbekistan”, Part I. SE "NIIMR" Tashkent. 2016, pp.292-293 (in Russian).
Mukhin P., Mirkamalov R., Seltmann R. Structure of the Muruntau gold ore region in the Kyzyl-Kum desert (Central Asia). Int. J. Earth Sci. (Geol.Rundsch.), Vol. 112, 2023, pp. 659-683, https://doi.org/10.1007/s00531-022-02262-6.
Rogachev B.V. Geophysical methods in the search for gold ore deposits. In the collection "Geophysics of gold deposits" Moscow, 1977, pp. 13-21 (in Russian).
Serdyukov M.K. Acquisition of geophysical, geochemical and geological studies. In the collection "Geophysical research in the search and exploration of ore deposits in Kazakhstan", Alma-Ata, 1978, pp. 6-8 (in Russian).
Usmanov R.R. et al. Report on the compilation of an aerial geological map of the Northern Nuratau mountains and adjacent territories, scale 1:50000 on an area of 12700 km2. Mingeo funds. Uz.SSR, 1984 (in Russian).
Vashchenko V.P., Larin N.M. et al. Geological survey scale 1:50000 report. Mingeo funds, Uz.SSR, 1980 (in Russian).
DOI: 10.33677/ggianas20240200128