ANCIENT DRAINAGE SYSTEM OF THE YELLOW RIVER ON NORTH CHINA PLAIN
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摘要: 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20~35m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14C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。Abstract: A study of several NE_SW-trending sand belts buried 20~35m underground in North China Plain from geophysical and drilling and experimental data has been carried out for a rational exploitation and utilization of ground water. These sand belts are of alluvial facies,representing ancient stream channels of the Yellow River. From their distributions,heavy mineral associations,and scale,and fossil contents and 14C dating they are known to have formed during the period spanning Late lce Age to Early Holocene. They cut into the interglacial brown clay and indicates that the Yellow River might have passed through the Sanmen Gorge in the Late lce Age and left some traces of Bohai Sea on the continental shelf.
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Key words:
- North China Plain /
- the Yellow River /
- ancient river system
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