该区震旦亚界分布于阴山东西复杂构造带及狼山帚状构造北支的西端巴音诺尔公附近,亦即以巴音西别山为中心,西起沙布更茨(下红寺),东至沙拉套海,东西长约50公里,南北宽约20公里的断陷盆地内(图1),构成以海生哈拉为轴部和轴向为北北西的复向斜.由于后期断层、岩浆活动的破坏以及第四系风成沙丘的覆盖,致使向斜西翼地层出露不全,东翼较完整.与下伏地层阿拉善群片麻岩为角度不整合,其上覆地层在区域上见 The Sinian sub-region of this area is located near the western end of Bayinuoergong in the Yinshan complex structure zone and the northern branch of Langshan broom structure, which is centered on Bayan Xishan Mountain, ) To the east of Shalataohai Sea, east to west about 50 km long and about 20 km north-south faulted basin (Figure 1), forming a synclinal axis with a marine Hara axis and a north-northwest axis. Late faults, magmatic activities and the deposition of the Quaternary aeolian sand dunes lead to the incomplete exposure of the syncline west wing and the east wing, which is not angularly integrated with the underlying Alashan gneiss, See you in the area