There are alluvial fans, river, delta, and lacus deposition systems, there are different distribution characteristics of sedimentary facies during the lower member of lower Ganchaigou of Tertiary.

• 确定了该区古近系下干柴沟组下段时期发育有冲积扇、河流、三角洲和湖泊沉积体系及沉积相的空间展布特点。