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波密-察隅地区,属冈底斯构造带的东端。以怒江大断裂为界,东临横断山系滇西近南北构造带,西面与近东西走向的喜马拉雅构造带相毗连。本区岩浆岩非常发育,出露面积约占全区的2/3,岩类复杂,从超基性岩至中酸性岩及酸性岩均有出露,其中以中酸性和酸性岩分布最广,构成四条近于平行的长达200km 以上的岩浆岩带,从南西向北东为:察隅岩带;阿扎贡拉岩带;德姆拉岩带;扎西则岩带。
Bomi - Chayu region, is the eastern end of the Gangdise structural belt. The Nujiang fault is bounded by the Nujiang fault and the eastward Hengduan Mountains west-north-south tectonic belt in the west of Yunnan Province. The west part is adjacent to the Himalayan tectonic belt near the east-west direction. The magmatic rocks in the area are well developed, with an exposed area accounting for 2/3 of the whole area. The rocks are complex and have been exposed from ultrabasic rocks to medium-acidic rocks and acidic rocks. Among them, the most widely distributed are medium-acidic and acidic rocks , Forming four nearly parallel up to 200km of magmatic rock belt, from southwest to north east: Chayu rock belt; Azagurra rock belt; Demra rock belt; Tashi is the rock belt.