SPECIAL-PURPOSE MAPPING FOR THE CRUSTAL FAULT STRUCTURE: USE AND CAPABILITIES ON THE EXAMPLE OF THE NATALKA ORE FIELD (THE MAGADAN REGION, RUSSIA)

The paper considers the results of special-purpose mapping for the Natalka ore field (the Magadan Region, Russia), within which, according to most researches, a similarly named super-large gold deposit is controlled by fault tectonics. Actually, the groundwork for a formal-based mapping was laid by mass measurements of non-displaced fractures made in 52 geological-structural observation points. Their paragenetic analysis yielded local solutions concerning orientation and kinematics of the fault zones along which the displacement-related fracture networks were formed, same-type point-to-point trace solutions, and, therefore, a scheme of fault structures for the mapping area. This scheme reflects a fault-block style of the crustal destruction at the intersection of two large fault zones – northwestern Tenka and sub-latitudinal Inyakan-Kolyma. According to the formal principles of rank analysis of local solutions, there have been identified three regional dynamic settings of the tectonic knot structure formation: sub-meridional compression, NE-SW compression, and a shear related to WNW compression and NNE extension. The ore field was formed within the intersection of regional faults, and the shear setting has become decisive in the ore-hosting structure formation. Left-lateral shearing along the Tenka fault zone was followed by the right-lateral kinematics along the conjugate Inyakan-Kolyma fault zone – the disjunctive zone which influenced the northwest-trending faults, developed under the secondary extension conditions controlling the formation of major ore bodies of the Natalka deposit. A special-purpose mapping-based scheme of fault structures, as well as stress-state and structure-formation stage reconstructions, are largely consistent with the results of the previous large-scale studies based on the processing of the structural-geological data obtained from the multiyear exploration of the Natalka ore field. This fact, together with the experience of using a methodical approach for different geological objects and the opportunity for its operations automation at the current level of development of electronic technology, makes it possible to recommend a special-purpose mapping for solving applied problems within relatively small areas and for identifying specific features of the stress-strain state of the Earth’s crust at different tectogenesis stages in large natural landscapes.

1. Akinin V.V., Alshevsky A.V., Polzunenkov G.O., Sergeev S.A., Sidorov V.A., 2023. The Age of the Natalka Orogenic Gold Deposit (U-Pb, 40Ar/39Ar, Re-Os Constrain). Russian Journal of Pacific Geology 17 (6), 570–585. https://doi.org/10.1134/S1819714023060027.

2. Angelier J., 1984. Tectonic Analysis of Fault Slip Data Sets. Journal of Geophysical Research 89 (B7), 5835–5848. http://doi.org/10.1029/JB089iB07p05835.

3. Aristov V.V., 2019. Spatial Regularities of Localization of Gold Ore Occurrences in the Yana-Kolyma Province. Russian Geology and Geophysics 60 (8), 876–889. https://doi.org/10.15372/RGG2019060.

4. Aristov V.V., Grigorieva A.V., Savchuk Y.S., Sidorova N.V., Sidorov V.A., 2021. Forms of Gold and Some Typomorphic Characteristics of Native Gold of the Pavlik Orogenic Deposit (Magadan Oblast). Geology of Ore Deposits 63 (1), 1–13. https://doi.org/10.1134/S1075701521010025.

5. Bortnikov N.S., Gamynin G.N., Vikent’eva O.V., Prokof’ev V.Yu., Prokop’ev A.V., 2010. The Sarylakh and Sentachan Gold-Antimony Deposits, Sakha-Yakutia: A Case of Combined Mesothermal Gold-Quartz and Epithermal Stibnite Ores. Geology of Ore Deposits 52 (5), 339–372. https://doi.org/10.1134/S1075701510050028.

6. Bulgakov V.S., Deshevykh A.P., Portyanko A.A., 1976. Gold Prospectivity Map at a Scale of 1:25000 for the Expedition’s Territory. Omchak Group of Sheets. Explanatory Note. Ust-Omchug (in Russian)

7. Burzunova Yu.P., 2011. Angles Between Conjugated Systems of near Fault Fractures in Idealized and Natural Paragenesises Formed in Various Dynamic Settings. Lithosphere 2, 94–110 (in Russian)

8. Chitalin A.F., 2016. Shear Tectonics and Gold Content of the Kolyma Region Gold and Technologies 4 (34), 122–126 (in Russian)

9. Fridovskii V.Yu., 1999. Structures of Gold Deposits in the Verkhoyansk-Kolyma Orogenic Area. Brief PhD Thesis (Doctor of Geology and Mineralogy). Yakutsk, 33 p. (in Russian)

10. Gamyanin G.N., Fridovsky V.Yu., Vikent’eva O.V., 2018. Noble-Metal Mineralization of the Adycha-Taryn Metallogenic Zone: Geochemistry of Stable Isotopes, Fluid Regime, and Ore Formation Conditions. Russian Geology and Geophysics 59 (10), 1271–1287. https://doi.org/10.1016/j.rgg.2018.09.006.

11. Geological-Structural Map of the Natalka Ore Field, 1991. Scale of 1:10000. TsNIGRI, Moscow (in Russian)

12. Goldfarb R.J., Taylor R.D., Collins G.S., Goryachev N.A., Orlandini O.F., 2014. Phanerozoic Continental Growth and Gold Metallogeny of Asia. Gondwana Research 25 (1), 48–102. https://doi.org/10.1016/j.gr.2013.03.002.

13. Golub V.N., Petrov A.N., Goryachev N.A., 2008. Geology and Structure of Ore Zones in the Southeast Flank of Natalka Gold Lode Deposit. Bulletin of the North-Eastern Scientific Center of FEB RAS 4, 16–20 (in Russian)

14. Golubev S.Yu., 2008. Formative Environment of the Natalkinskoe Gold Deposit. Ores and Metals 6, 72–76 (in Russian)

15. Goncharov V.I., Voroshin S.V., Sidorov V.A., 2002. Natalka Gold Lode Deposit. NEISRI FEB RAS, Magadan, 250 p. (in Russian)

16. Goryachev N.A., Sidorov V.A., Litvinenko I.S., Mikhalitsyna T.I., 2000. Mineral Composition and Petrochemical Features of the Ore-Bearing Rocks in Deep Horizons of the Natalka Deposit. Kolyma 2, 38–49 (in Russian)

17. Grigorov S.A., 2006. Natalka Gold Deposit: Origin and Dynamics of Formation as Portrayed by the Systems Analysis of Geochemical Field. Ores and Metals 3, 44–48 (in Russian)

18. Groves D.I., Goldfarb R.J., Gebre-Mariam M., Hagemann S.G., Robert F., 1998. Orogenic Gold Deposits: A Proposed Classification in the Context of Their Crustal Distribution and Relationship to Other Gold Deposit Types. Ore Geology Reviews 13 (1–5), 7–27. https://doi.org/10.1016/S0169-1368(97)00012-7.

19. Gushchenko O.I., 1975. Kinematic Reconstruction of the Principal Stress Directions (from the Geological and Seismological Data). Doklady of the USSR Academy of Sciences 225 (3), 557–560 (in Russian)

20. Gzovsky M.V., 1963. General Problems of Tectonophysics and Tectonics of the Baijansai Anticlinorium. Parts 3, 4. Publishing House of the USSR Academy of Science, Moscow, 544 p. (in Russian)

21. Kalinin A.I., Kanishchev V.K., 1992. The Natalka Ore Field Structure. Explanatory Note to the 1:10000 Geological-Structural Map. Book 1. Northeast Branch of TsNIGRI, Magadan, 192 p. (in Russian)

22. Kalinin A.I., Kanishchev V.K., Orlov A.G., Gashtold V.V., 1992. The Natalka Ore Field Structure. Kolyma 10–11, 10–14 (in Russian)

23. Karelin Yu.P., Beltsov A.I., Fomin V.K., 1985. A Report on Multi-Sheet Geological Mapping and Additional 1:50000 Scale Surveying of the Omchak Ore Cluster (Sheets Р-55-80, В, Г; -81-81-В; -92-А,Б,Г; -93-А,В) for 1981–1985. Ust-Omchug, 248 p. (in Russian)

24. Khrenov P.M., Demin A.N., Taskin A.P., Alexandrov V.K., Mordovskaya T.V., 1977. Blind Transverse Faults of the Baikal Rift System. In: N.A. Logachev, N.A. Florensov (Eds), A Role of Rifting in the Geological History of the Earth. Nauka, Novosibirsk, p. 99–104 (in Russian)

25. Kondratyev M.N., Polzunenkov G.O., Anikin V.V., 2018. Stages of Deformations at the Natalka Gold Deposit. In: Scientific Youth to the Northeast Russia: Proceedings of the VII Interregional Conference of Young Scientists (May 24–25, 2018). Iss. 7. Tipografia LLC, Magadan, p. 20–22 (in Russian)

26. Konstantinov M.M. (Ed.), 2010. Gold Deposits of Russia. Akvarel, Moscow, 365 p. (in Russian)

27. Konstantinovsky A.A., 2007. Structure and Geodynamics of the Verkhoyansk Fold-Thrust Belt. Geotectonics 41 (5), 337–354. https://doi.org/10.1134/S0016852107050019.

28. Kornilov M.F., Mishin N.I., Panfilov A.L., 2007. Structural-Geological Models of Deposits as a Basis for Estimating Mineral Resources and Reserves. Subsoil Use in the 21st Century 3, 60–62 (in Russian)

29. Makarov V.I., Shchukin Yu.K., 1979. Blind Fault Activity Assessment. Geotectonics 1, 96–109 (in Russian)

30. Mezhov S.V., 2000. Geological Structure of the Natalka Gold Deposit. Kolymskie Vesti 9, 8–17 (in Russian)

31. Nekrasov E.M., 2019. Localisation of Gold Ores in Faults of Different Types. Proceedings of Higher Educational Establishments. Geology and Exploration 6, 33–43 (in Russian)

32. Nekrasov E.M., Dorozhkina L.A., Dudkin N.V., 2015. Geology and Structural Features of the Largest Endogenous Gold Ore Deposits. Astreya-Tsentr, Moscow, 192 p. (in Russian)

33. Nekrasov E.M., Dorozhkina L.A., Dudkin N.V., Kosovets T.N., 2019. Systematics, Structure and Reserves of Gold Ore Deposits. Astreya-Tsentr, Moscow, 241 p. (in Russian)

34. Nevsky V.A., 1979. Fracture Tectonics of Ore Fields and Deposits. Nedra, Moscow, 224 p. (in Russian)

35. Nikolaev P.N., 1992. Methodology of Tectonodynamic Analysis. Nedra, Moscow, 295 p. (in Russian)

36. Ovsov R.N., 2020. Structural Control of Mineralization of the Natalka Deposit. In: Science of the Northeast Russia: Fundamental and Applied Studies in the North Pacific and Arctic. Proceedings of the Jubilee Conference Dedicated to the 60th Anniversary of the NEISRI FEB RAS (March 5–6, 2020). NEISRI FEB RAS, Magadan, p. 121–122 (in Russian)

37. Parfenov L.M., Kuzmin M.I. (Eds), 2001. Tectonics, Geodynamics and Metallogeny of the Sakha Republic (Yakutia). MAIK Nauka/Interperiodica, Moscow, 571 p. (in Russian)

38. Parfenov V.D., 1984. On Tectonophysical Analysis Method for Geological Structure. Geotectonics 1, 60–72 (in Russian)

39. Pluteshko V.P., Yablokova S.V., Yanovskii V.M., 1988. Natalka Deposit. In: Geology of Gold Deposits in the East of the USSR. TsNIGRI, Moscow, p. 126–140 (in Russian)

40. Pristavko V.A., Sidorov V.A., Mikhalitsyna T.I., Burova A.S., Krasnaya E.N., 2000. Geological-Geochemical Model of the Natalka Gold Deposit. Kolymskie Vesti 9, 18–24 (in Russian)

41. Prokopiev A.V., 1998. The Verkhoyansk-Chersky Collisional Orogenic Belt. Russian Journal of Pacific Geology 17 (5), 3–10 (in Russian)

42. Prokopiev A.V., Borisenko A.S., Gamyanin G.N., Fridovsky V.Yu., Kondrat’eva L.A., Anisimova G.S., Trunilina V.A., Vasyukova E.A. et al., 2018. Age Constraints and Tectonic Settings of Metallogenic and Magmatic Events in the Verkhoyansk-Kolyma Folded Area. Russian Geology and Geophysics 59 (10), 1237–1253. https://doi.org/10.1016/j.rgg.2018.09.004.

43. Radkevich E.A., Tomson I.N., Gorlov N.V., 1956. On Regional Excessive Fracture Belts and Belts and Zones. Soviet Geology 58, 170–185 (in Russian)

44. Ramsay J.G., Huber M.I., 1983. The Techniques of Modern Structural Geology. Vol. 1: Strain Analysis. Academic Press, London, 307 p.

45. Ramsay J.G., Huber M.I., 1987. The Techniques of Modern Structural Geology. Vol. 2: Folds and Fractures. Academic Press, London, 391 p.

46. Rastsvetaev L.M., 1987. Structural-Paragenetic Analysis of Disjunctive Tectonic Faults. In: A.V. Peive, A.V. Lukyanov (Eds), Problems of Structural Geology and Physics of Tectonic Processes. Moscow, p. 173–235 (in Russian)

47. Rats M.V., Chernyshev S.N., 1970. Fracturing and Properties of Fractured Rock. Nedra, Moscow, 164 p. (in Russian)

48. Rebetsky Yu.L., 2007. Tectonic Stresses and Strength of Natural Mountain Ranges. Akademkniga, Moscow, 406 p. (in Russian)

49. Rebetsky Yu.L., Sim L.A., Marinin A.V., 2017. From Slickenside to Tectonic Stresses. Techniques and Algorithms. GEOS, Moscow, 234 p. (in Russian)

50. Savchuk Yu.S., Volkov A.V., Aristov V.V., Murashov K.Yu., 2023.Ore-Bearing Faults of Transpressional-Collisional Kinematics in the Verkhoyansk-Kolyma Fold Belt (Structural Consequences of the Geodynamic Model). Geology of Ore Deposits 65 (2), 170–189 (in Russian) https://doi.org/10.31857/S001677702302003X.

51. Savchuk Yu.S., Volkov A.V., Aristov V.V., Sidorov V.A., Lyamin S.M., 2018. Structure and Composition of Gold Pavlik Deposit. Ores and Metals 2, 77–85 (in Russian)

52. Seminsky K.Zh., 1994. Principles and Stages of Special Mapping of the Fault-Block Structure on the Basis of Fracturing Studies. Russian Geology and Geophysics 9, 112–130 (in Russian)

53. Seminsky K.Zh., 1997. Angle Relationships Between Conjugate Joint Systems near Strike-Slip, Normal, and Thrust Fault Planes. Doklady Earth Sciences 354 (4), 531–533.

54. Seminsky K.Zh., 2003. Internal Structure of Continental Fault Zones. Tectonophysical Aspect. GEO, Novosibirsk, 244 p. (in Russian)

55. Seminsky K.Zh., 2014. Specialized Mapping of Crustal Fault Zones. Part 1: Basic Theoretical Concepts and Principles. Geodynamics & Tectonophysics 5 (2), 445–467 (in Russian) https://doi.org/10.5800/GT-2014-5-2-0136.

56. Seminsky K.Zh., 2015. Specialized Mapping of Crustal Fault Zones. Part 2: Main Stages and Prospects. Geodynamics & Tectonophysics 6 (1), 1–43 (in Russian) https://doi.org/10.5800/GT-2015-6-1-0170.

57. Seminsky K.Zh., Bobrov A.A., 2018. Geoelectrical Images of Normal Fault Zones: Tectonophysical Interpretation of the Shallow-Depth Electrical Resistivity Tomography Data on the Buguldeika-Chernorud Graben in the Western Baikal Region. Geodynamics & Tectonophysics 9 (4), 1339–1361 (in Russian) https://doi.org/10.5800/GT-2018-9-4-0399.

58. Seminsky K.Zh., Burzunova J.P., Seminsky A.K., Vursiy G.L., Ovsov R.N., Bortnikov N.S., 2025. The Natalkinskoe Gold Deposit: Formation Conditions Based on Paragenetic Analysis of Dike and Ore Vein Networks. Doklady Earth Sciences 525 (2), 27. https://doi.org/10.1134/S1028334X25608661.

59. Seminsky K.Zh., Burzunova Yu.P., Bornyakov S.A., Miroshnichenko A.I., Cheremnykh A.S., Seminsky A.K., Buddo I.V., Smirnov A.S., Gorlov I.V., 2023. Analysis of the Fault-Block Structure and Stress State of the Sedimentary Cover in Gas-Condensate Deposits: Basics of the Tectonophysical Approach. Geodynamics & Tectonophysics 14 (2), 0689 (in Russian) https://doi.org/10.5800/GT-2023-14-2-0689.

60. Seminsky K.Zh., Burzunova Yu.P., Seminsky A.K., Bortnikov N.S., Vursiy G.L., Ovsov R.N., Bornyakov S.A., 2026 (in press). A Tectonophysical Model of Formation of the Fault Structure of the Natalka Ore Field: Special-Purpose Mapping Results. Geology of Ore Deposits 1 (in Russian)

61. Seminsky K.Zh., Gladkov A.S., Lunina O.V., Tugarina M.A., 2005. Internal Structure of Continental Fault Zones. Applied Aspect. GEO Publishing House, Novosibirsk, 293 p. (in Russian)

62. Seminsky K.Zh., Kozhevnikov N.O., Cheremnykh A.V., Pospeeva E.V., Bobrov A.A., Olenchenko V.V., Tugarina M.A., Potapov V.V., Zaripov R.M., Cheremnykh A.S., 2013. Interblock Zones in the Crust of the Southern Regions of East Siberia: Tectonophysical Interpretation of Geological and Geophysical Data. Geodynamics & Tectonophysics 4 (3), 203–278 (in Russian) https://doi.org/10.5800/GT-2013-4-3-0099.

63. Seminsky K.Zh., Seminsky Zh.V., 2016. Special Mapping of Crustal Fault Zones and Its Capabilities for the Study of Structural Control of Kimberlites in the Alakit-Markha Field of the Yakutian Diamondiferous Province. Publishing House of Irkutsk State Technical University, Irkutsk, 204 p. (in Russian) http://crust.irk.ru/art/2016speccart.pdf.

64. Seminsky K.Zh., Tugarina M.A., 2011. Results of Comprehensive Studies of the Underground Hydrosphere Within the Western Shoulder of the Baikal Rift (As Exemplified by the Bayandai – Krestovsky Cape Site). Geodynamics & Tectonophysics 2 (2), 126–144 (in Russian) https://doi.org/10.5800/GT-2011-2-2-0037.

65. Shakhtyrov V.G., 2009. Structural Parageneses in the Tenka Deep-Seated Fault Zone (Yana-Kolyma Folded System). Natural and Technical Sciences 6 (44), 313–319 (in Russian)

66. Sharafutdinov V.M., Khasanov I.M., Mikhalitsyna T.I., 2008. Petrophysical Zoning of the Natalka Ore Field. Russian Journal of Pacific Geology 2 (5), 441–453. https://doi.org/10.1134/S1819714008050072.

67. State Geological Map of the Russian Federation, 2002. Nero-Bakhapchinsky Series. Scale of 1:200000. Sheet Р-55-XXII (Omchak). Magadangeology, Magadan (in Russian)

68. Struzhkov S.F., Natalenko M.V., Chekvaidze V.B., Isakovich I.Z., Golubev S.Yu., Danil’chenko V.A., Obushkov A.V., Zaitseva M.A., Kryazhev S.G., 2006. Natalka Gold Deposit: A Multi-Factor Model. Ores and Metals 3, 34–44 (in Russian)

69. Tretyakov F.F., 2021. Modern Aspects of the Tectonic Structure of the South Verkhoyansk Synclinorium. Russian Journal of Pacific Geology 15 (3), 268–277. https://doi.org/10.1134/S1819714021030088.

70. Yushmanov Yu.P., 2020. Gold-Bearing Stockwork of the Natalka Deposit in the Structure of a Rotational Shear Duplex of the Central Kolyma Tenkinsky Fault. Regional Problems 23 (1), 6–12 (in Russian) https://doi.org/10.31433/2618-9593-2020-23-1-6-12.

71. Zhirnov A.M., 1984. Localization Features of Gold Mineralization in the Circular Structure. Bulletin of the USSR Academy of Sciences. Geological Series 3, 98–111 (in Russian)