The Lancangjiang metallogenic belt in western Yunnan is an important magmatic, metamorphic and tectonic mobile zone of Southwestern China, whose geotectonic location is very unique.
滇西澜沧江成矿带是我国西南一条重要的岩浆—变质—构造活动带，大地构造位置极为独特。
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SW Margin of the Yangtze Block, belonged to South part of the South China Plate, spans two geotectonic units of Yangtze Landmass and South China active zone.