现代黄河三角洲沉积相分析

Sedimentary Facies Analysis of the Modern Yellow River Delta

基于大量的文献调研,应用Google earth软件对黄河三角洲区域地貌进行取点分析,结合区域地质、沉积背景,绘制沉积微相图、沉积模式图,研究了黄河三角洲的沉积相和沉积机制,并详细分析了三角洲的发育模式。研究发现:黄河三角洲河流作用强于波浪作用而形成了其独特的鸟足状形态;三角洲发育典型的三角洲平原、三角洲前缘、前三角洲三层结构;三角洲平原相沼泽微相十分发育;三角洲前缘相河口砂坝微相较为发育;平原分流河道断流现象加剧。

Based on a large number of literature research, langforms of the Yellow River delta area was taken and analyzed by Google earth software, sedimentary facies and sedimentary model were drew combining with regional geological and deposition setting, the sedimentary facies and depositing mechanism of Yellow River delta were studied and the development model of delta was analyzed in details. The study shows that the Yellow River delta formed its unique bird-foot delta due to that fluvial action is stronger than waves; the Yellow River delta develops three layer structures including delta plain, delta front and pro-delta; the marsh micro-facies is very rich in delta plain, and the river mouth sand bares are well developed in the northeast of pro-delta;plain distributary channels are often cut off.