G. A. Kozlov, B. A. Kalmykov, A. A. Trusov, D. I. Giliazov, A. V. Osipov, V. I. Leontev

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

Abstract. The paper presents new data of primary diamond potential in the northwestern 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 strikeslips in the Namyldilakh River valley.

Keywords: diamonds, Chara-Sinsk zone, kimberlite field, South Yakutia