我国三角洲沉积及其与能源矿产聚集关系研究

Study on the Delta Deposit in Our Country and Its Relationship with Energy Mineral Accumulation

海岸带是油气及其他矿产的聚集带,而三角洲则是该带中油气的集中点。油气勘探的需要促进了三角洲的研究。三角洲的沉积作用是一种动态的变化过程,在三角洲建设中,一方面河流携带泥沙入海,使河口不断分叉、延伸,海岸线向海推进;另一方面,由于决口扇的发展,又使三角洲平原区域性扩展。我国的三角洲类型可分为潮汐型、河流型、波浪型和冲击扇—三角洲类型等主要类型。我国三角洲主要类型分别有:潮汐型的长江、河流型的黄河、波浪型的韩江、冲积扇—三角洲的滦河。

The coastal zone is the collecting band of oil,gas and other minerals,and the delta is the focus point of the oil and gas in this belt.The need of oil and gas exploration has promoted the research on the delta.Delta sedimentation is a dynamic change process,in the construction of delta,on the one hand,the rivers carry silt flowing into the sea,resulting that the estuaries constantly bifurcate,extend and advance toward the sea coast.On the other hand,due to the development of crevasse-splays,the delta plain region has been expanded.The delta type in China can be divided into tidal type,rivers type,wavy and impact fan delta type and so on.Our delta main types include the type of Yangtze river tidal,type of the Yellow River,the wavy of Hanjiang river and alluvial fan-braided delta of the Luanhe river.