During this evolution , seven second - order tectonic units were formed ; from north to south are the mingqianri cretaceous residual sea basin , the arsuo tectonic melange zone , the taricuo - wenbu yenshan magmatic arc belt , the cuoqin - bangduo late paleozoic composite back - arc basin , the jiangrang - geerdi faulted uplift , the gangdise - chazi himalayan magmatic arc belt , and the xigaze - anba fore - arc basin . these units comprise important parts of a poly - arc - basin system and exhibit evolutional features of mesozoic to cenozoic arc - basin systems . mosaic pattern of these tectonic units delineates the lithosphere coupling processes of the gangdise tectonic belt under mechanisms such as back - arc basin attenuation and arc - continent collision 自中新生代以来，冈底斯构造带经历了洋壳俯冲、弧陆碰撞、陆内俯冲-碰撞、走滑和块段隆升的多阶段构造演化历程，形成了由北向南七个二级构造单元，即岷千日白垩纪残余海盆、阿索构造混杂岩带、它日错?文部燕山期岩浆弧带、措勤?帮多晚古生代复合弧后盆地、江让?格尔耿断隆、冈底斯?查孜喜马拉雅期岩浆弧带、日喀则?安巴弧前盆地。
