Diamictites (tilloids) in the Precambrian and Paleozoic Sections of the East Part of the Middle Tian Shan

The article presents new information on the structure of the Upper Precambrian sections of the eastern part of the Middle Tien Shan containing horizons of diamictites (tilloids). In the volume of the Dzhetym series series of the Vendian, the allocation of two lateral types of section is substantiated – Dzhetymtau and Akshiyryak. The first is characterized by the presence of rocks containing iron-oxide compounds (ferruginous quartzites, hematite schists) in the section. The marker for the second is the presence of black shale horizons with pyrite mineralization. At the same time, both types of section contain two levels of diamictite development – Dzhetymtau and Baikonur. The materials are presented indicating the presence within the eastern part of the Middle Tien Shan of a previously unknown, pre-Dzhetymtau level of diamictite development, as part of the Upper Riphean Boordu formation. It is compared with the Bayisi suite, which forms the base of the Kurugtagh series in northwestern China. In addition, it is planned to identify the level of Paleozoic diamictites in the Kuilu-Sarydzhaz part of the Middle Tien Shan.