滇西地区沿哀牢山—金沙江产出长达3700km的新生代富碱钾质岩浆岩带,岩石类型以霓辉正长斑岩和石英正长斑岩为主,并含有多种类型的深源岩石包体。该区带自晚新生代以来,受印度-亚欧板块碰撞和与此相伴的青藏高原整体快速抬升的影响,断裂明显由挤压转为拉张,出现断陷盆地,显示具 Along the Ailao-Jinsha River in the west of Yunnan Province, a 3700 km-long Neoproterozoic potash-bearing magmatic belt is produced. The rock type is dominated by Neoproterozoic porphyry and quartz cerambite and contains many types of Deep source of rock inclusions. Since the Late Cenozoic, the zone was affected by the Indian-Eurasian plate collision and the overall rapid uplift of the Qinghai-Tibet Plateau. The fault was obviously changed from extrusion to tension, and the faulted basin appeared.