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三江(金沙江、澜沧江、怒江)地区系指青藏高原东部、川西和滇西一带。构造上位于阿尔卑斯-印支特提斯构造域东端。处于青藏高原周边三大构造结(帕米尔、秦岭、横断山)横断山构造结的中段。由于印度板块东北岬角和扬子板块西南岬角的强烈挤压作用,使该区构造变形极为复杂。由于这里山高谷深,地形切割甚剧,各种地质景观出露良
Sanjiang (Jinsha River, Lancang River, Nu River) area refers to the eastern part of the Qinghai-Tibet Plateau, western Sichuan and western Yunnan area. Constructed in the eastern Alps-Indotitidis tectonic domain. Located in the middle of the Qinghai-Tibet Plateau three structural knot (Pamir, Qinling, Hengduan Mountains) Hengduanshan structural knot in the middle. Due to the intense extrusion of the northeastern headland of the Indian Plate and the southwestern headland of the Yangtze Plate, the tectonic deformation in this area is extremely complicated. Due to the high mountains and valleys here, the terrain is cut very much and all kinds of geological landscapes are exposed