The Nadigangri Formation consist of intermediate-acidic volcanics, volcaniclastic rocks intercalated with glutenite, in the central Qiangtang area, north of the Longmu Co-Shuanghu suture, northern Tibet. The SHRIMP U-Pb age of zircons from andesite at the bottom of volcanics is 2194 Ma, which indicates the volcanisms started in the late Triassic and accords with the age of low-temperature high-pressure metamorphism in this area. According to regional geological data, the volcanics of the Nadigangri Formation probably formed in a volcanic arc tectonic setting and was the result of a northward subduction of the Longmu Co-Shuanghu suture in the late Triassic.