The basin tectonic model: it is intermont basin during late Jurassic to early Cretaceous, developed into faulted-lacustrine basin in Eogene, and evolved into depression in Neogene and Quaternary.

“盆地”构造发模式为：从晚侏罗世到末发间“盆地”开始、发展到早第三断陷湖盆发、再演化为晚第三及第四地陷发阶段。