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为合理开发利用地下水及水资源调蓄 ,通过物探、钻探及室内分析数据 ,对华北平原埋深 2 0～ 35 m的数条 SW—NE向砂带进行了研究。该砂带具有许多河流相沉积标志 ,从分布格局、重矿物组合、砂带规模、古生物化石和1 4 C测年看 ,该带是末次盛冰期—早全新世形成的黄河古河道带。它切割了末次冰期间冰段棕红色粘土 ,形成了切割谷。谷内堆积了末次盛冰期—早全新世砂砾石 ,后又被中全新世淤泥质粘土掩埋而成为埋藏古河道带。它的存在说明黄河最晚在末次盛冰期就已经打开了三门峡 ,在渤海大陆架也留下了古河道带。
In order to rationally develop and utilize groundwater and water resources, a number of SW-NE sand belts with a depth of 20 ~ 35 m in the North China Plain were studied through geophysical, drilling and indoor analysis data. The belt has many river facies depositional signs. From the distribution pattern, heavy mineral assemblages, belt size, paleontology fossils and 14C dating, the belt is the Yellow River ancient river belt formed during the last glacial-early Holocene. It cuts the red-brown clay in the ice during the last ice, forming the cutting valley. The last glacial accumulation, the early Holocene sand and gravel, was deposited in the valley, and was buried by the Holocene silt clay to become a buried ancient river channel. Its existence shows that the Yellow River opened Sanmenxia at the latest glaciation and left the ancient river course in the Bohai Sea continental shelf.