New prospects for primary diamond potential in the Namana-Sinsk region, Republic of Sakha (Yakutia)

The paper presents new data of primary diamond potential in the north-western Aldan province (within the Chara-Sinsk zone). The authors describe the geological structure, pattern, and features of various transformants and anomalous geophysical fields. They all are ranked by time, the occurrence characteristics, and kinematics. There are identified fault systems expected to control the kimberlite field location. The findings specify heavy mineral concentrate sampling, morphological and microprobe analysis data of kimberlite indicator minerals. They are considered as criteria and signs of primary diamond potential, along with modeling the potential area position of kimberlite magmatism and intermediate reservoirs. The data of morphology, composition, preservation rate of kimberlite indicator minerals in the area, as well as their distribution pattern demonstrate that their halos in the Myraya, Khatystyr, Markha, Markhachan, and other river valleys are confined to a single northeastern mineralogical field within the Chara-Olyokma segment of the Chara-Sinsk zone. Here the potential kimberlite field can be located in the articulation area of the Chara-Sinsk zone and younger northwestern strike-slips in the Namyldilakh River valley.

1. Protsenko E. V., Tolstov A. V., Gorev N. I. Kimberlite prospecting criteria and new prospects for Yakutia primary diamond potential. Ores and Metals. 2018; (4): 14–23 (In Russ.).

2. Kimberlites of the Manchary pipe: A new kimberlite field in Central Yakutia. Russian Geology and Geophysics. 2010; 51 (1): 121–126. https://doi.org/10.1016/j.rgg.2009.12.012.

3. Prospects for diamond potential of the southern side of the Vilyui syneclise / V. P. Afanasiev [et al.]. Otechestvennaya Geologiya. 2007; (1): 119–122. (In Russ.).

4. On the prospects of diamond content of the southern side of the Vilyui syneclise / V. P. Afanasiev [et al.]. Geology of Ore Deposits. 2020; 62 (6): 535–541. https://doi.org/10.1134/S1075701520040029.

5. Izbekov E. D., Pod’yachev B. P., Afanas’ev V. P. Signs of symmetric diamond concentration in the eastern Sibe­rian platform (relative to the Vilyui syneclise axis). Doklady Earth Sciences. 2006; 411: 1339–1340. https://doi.org/10.1134/S1028334X06090017.

6. Geology and diamond potential prospects in the south­eastern margin of the Siberian platform and Sette-Daban / I. I. Kolodeznikov [et al.]; Ed. K. K. Levashov. Moscow: Nedra Publ.; 1996. 160 p. (In Russ.).

7. Mishnin V. M. The main figure of approximation of the complete area of distribution of kimberlites and related rocks of the eastern Siberian platform. Geology, distribution patterns, methods of forecasting and prospecting for diamond deposits: Proc. of the Sci. Conf., Mirny, 24–28 March 1998. Mirny: Mirny City Printing House; 1998. P. 274–277. (In Russ.).

8. Mishnin V. M., Grinenko V. S., Andreev A. P. The third geological-industrial type of concentrated mineralization of the Yakut buried uplift: A retrospective view. Nauka i Obra­zovanie. 2013; (4): 18–24. (In Russ.).

9. Yakut buried uplift: Injected kimberlites and their tec­tonic framework / V. M. Mishnin [et al.]. Nauka i Obrazovanie. 2010; (2): 11–15. (In Russ.).

10. Mishnin V. M., Grinenko V. S. Carboniferous deposits of the Aldan anteclise — a key link in the “protocollector — primary diamond source” system. Nauka i Obrazovanie. 2006; (4): 14–19. (In Russ.).

11. Tolstov A. V., Gorev N. I., Protsenko E. V. New prospects for primary diamond potential of the Charo-Sinskaya zone of deep faults (South Yakutia). Scientific and methodological foundations for forecasting, prospecting, and assessing deposits of diamonds, precious, and nonferrous metals: Proc. of the VIII In­tern. Sci. Conf., Moscow, 16–18 Apr. 2018. Moscow: TsNIGRI; 2018. P. 21–22. (In Russ.)

12. Prospects for diamond potential of the Charo-Sinskaya fault zone / A. V. Tolstov [et al.]. Ores and Metals. 2021; (3): 46–58. (In Russ.).

13. Rozen O. M., Manakov A. V., Zinchuk N. N. Siberian craton: Origin and the diamond control. Moscow: Sci. World; 2006. 212 p. (In Russ.)

14. State Geological Map of the Russian Federation at a scale of 1 : 1,000,000. Third Generation. Anabar-Vilyuy Series. Sheet P‑51 — Olyokminsk. Explanatory Note. St. Pe­tersburg: VSEGEI; 2023. 380 p. (In Russ.)

15. Rotman A. Ya., Serenko V. P. Petrological features of basites in Western Yakutia volcanic pipes. Geology and mineral resources in Eastern Siberia. Novosibirsk: Nauka; 1985. P. 173–183. (In Russ.).

16. Gaiduk V. V. Middle Paleozoic Vilyuy rift system. Ya­kutsk: YaB SB AS USSR; 1988. 127 p. (In Russ.).

17. Chara-Sinsk dike swarm (middle reaches of the Lena River): Local U-Pb age of zircon and petrological and geochemical features of rocks / V. E. Guzev [et al.]. Region­al Geology and Metallogeny. 2021; (87): 28–41. -41. (In Russhttps://doi.org/10.52349/08697892_2021_87_28.).

18. The nature of basic explosive breccias within the Nakyn kimberlitic field (Yakutian diamondiferous province) / A. I. Kise­lev [et al.]. Pacific Geology. 2004; 23 (1): 97–104 (In Russ.).

19. Masaitis V. L. Volcanism and tectonics of the Middle Paleozoic Patom-Vilyuy aulacogen: VSEGEI Proc. Vol. 192. Mos­cow: Nedra; 1975. 181 p. (In Russ.).

20. Protsenko E. V., Gorev N. I. Tectonic features of kimber­lite bodies location and their use in forecasting (exemplified by kimberlite fields of the Western Yakutia). Ores and Metals. 2017; (4): 62–69. (In Russ.).

21. Sobolev N. V. The deep seated inclusions in kimberlites and the problem of the upper mantle composition. Novosi­birsk: Nauka; 1974. 264 p. (In Russ.).

22. Haggerty S. E. The chemistry and genesis of opaque minerals in kimberlites. Physics and Chemistry of the Earth. 1975; 9: 295–307. https://doi.org/10.1016/0079-1946(75)90024-5.

23. Origin and significance of ilmenite megacrysts and macrocrysts from kimberlite / D. J. Schulze [et al.]. Interna­tional Geology Review. 1995; 37 (9): 780–812. https://doi.org/10.1080/00206819509465427.

24. Moore A. E. A model for the origin of ilmenite in kim­berlite and diamond: Implications for the genesis of the dis­crete nodule (megacryst) suite. Contr. Mineral. and Petrol. 1987; 95: 245–253. https://doi.org/10.1007/bf00381274.

25. Gurney J. J., Helmstaedt H., Moore R. O. A review of the use and application of mantle mineral geochemistry in diamond exploration. Pure and Applied Chemistry. 1993; 65 (12): 2423–2442. https://doi.org/10.1351/pac199365122423.

26. Mitchell R. H. Kimberlites: Mineralogy, geochemistry and petrology. New York; London: Plenum Press; 1986. 442 p. https://doi.org/10.1007/978-1-4899-0568-0.

27. Diamond prospectivity and indicator mineral chemis­try: A western Australian perspective / C. B. Smith [et al.]. In­tern. Kimberlite Conf.: Extended abstr. 1991; 5: 380–382. https://doi.org/10.29173/ikc2576.

28. Tomshin M. D., Gogoleva S. S. New approach to the search for kimberlites. Nauka i Tekhnika v Yakutii. 2021; (2): 19–22. . (In Russhttps://doi.org/10.24412/1728-516X‑2021-2-19-22.).

29. Localization of high-titanium dolerites in kimberlite fields: Possible causes and a new criterion for kimberlite search / M. D. Tomshin [et al.]. Russian Geology and Geo­physics. 2024; 65 (9): 1234–1245. . (In Russhttps://doi.org/10.15372/GIG2024105.)

30. Tomshin M., Gogoleva S. Behavior of TiO2 in dolerits as a possible search sign for kimberlites. IOP Conf. Ser.: Earth Environ. Sci. 2020; 609: 012073. - https://doi.org/10.1088/17551315/609/1/012073.

31. Tomshin M. D., Tolstov A. V., Zhuravlev A. I. Prospects for discovering kimberlites in the Charo-Sinsk dike swarm based on the geochemical features of basites. Arctic and Sub­arctic Natural Resources. 2025; 30 (3): 353–364. . (In Russhttps://doi.org/10.31242/2618-9712-2025-30-3-353-364.).

32. The Chara-Sina dyke swarm in the structure of the Mid­dle Paleozoic Vilyui rift system (Siberian craton) / A. I. Kise­lev [et al.]. Doklady Earth Sciences. 2016; 471 (1): 1179–1182. https://doi.org/10.1134/S1028334X16110167.

33. Kiselev A. I. The relations of kimberlite and basite magmatism in Nakinskoye field of Yakutsk diamond prov­ince. Proceedings of Irkutsk State Technical University. 2008; (4): 18–21. (In Russ.)