A jade belt refers to a region or zone rich in jade deposits, often associated with tectonic settings where high-pressure, low-temperature metamorphism occurs. These belts are significant in economic geology for jade mining and in studying the geological conditions that lead to jade formation.
Source Harlow, G. E., & Sorensen, S. S. (2005). “Jade (Jadeitite and Nephrite) and Serpentinite: Metasomatic Connections.” International Geology Review, 47(2), 113-146.