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雅鲁藏布江缝合带,作为新特提斯洋闭合和冈底斯弧诞生的板块聚合边界,过去通常以日喀则蛇绿岩带及相伴产出的高压低温变质带(肖序常和高延林,1984)和混杂堆积带(陈国铭等,1984)为典型标志。日喀则蛇绿岩带广布于雅鲁藏布江南岸,组合层序自南而北依次为变质橄榄岩带、镁铁—超镁铁杂岩、席状岩墙—岩床杂岩和基性熔岩(鲍佩声和
The Brahmaputra suture zone, as a polymerized boundary of the plate where the Neo-Tethys Ocean Closure and Gangdese Arc were born, was generally dominated by the Xigaze ophiolite belt and associated high-pressure and low-temperature metamorphic belt (Xiaozhang Chang and Gao Yanlin, 1984) (Chen Guoming et al., 1984) as a typical sign. The Xigaze ophiolite belt is widely distributed on the south bank of the Yarlung Zangbo River. The assemblage sequence from south to north are metamorphic peridotite, mafic-ultramafic complex, mafic-dyke-bedrock complex and basic lava