Understanding the tectonic history of the Arctic-Alaska Chukotka Plate (AACP) and Pearya is central to unravelling the development of the Arctic Basin. Similarly, the Dzabkhan and Khubsugul terranes occupy a central position in the Central Asian Orogenic Belt (CAOB). The CAOB is the largest region of Phanerozoic crustal growth. Our group aims to better understand the origin and travels of these terranes through basin analysis and tectonic synthesis. These studies are further placing constraints on modes of crustal growth.