Abstract
The vast territory of Mongolia is under the influence of two different geodynamic environment in terms of active tectonics: the Altai and Gobi-Altai Mountains are under transpressive regimes associated with the Indo-Eurasian collision, whereas the Sayan and Khentii Mountains are influenced by the extension of the Baikal-Khuvsgul rift. Moreover, most of the territory of Central Mongolia is in a transtensional regime possibly related to the movement of the North China block (locally Amur micro-block) to the east.My research was performed in areas located in different regions of tectonics and geographical boundaries as well as weather and topography/relief: the Khovd fault in the Altai Mountains, the Khuvsgul fault in the Sayan Mountains, and the Mungunmorit fault in the Khentii Mountains, that are hundreds of kilometers apart.In this study, the following methods for studies of active faults were used. These include fault mapping based on satellite images and field routes, paleoseismological investigation to determine the ages and recurrence period of large earthquakes along the faults.