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”构造育模式为：罗世到白垩纪末育的山间“盆地”、展到早第三纪断陷湖盆的育、再演化为第三纪及第四纪地陷育阶段。