Experimental autostratigraphy of shelf deltas growing under intense sediment-dispersive forcing

通过模型实验，探讨了强烈泥沙弥散条件下发育的陆棚三角洲的自地层学。值得注意的是：(1)即使在沉积物高度分散但没有远离海岸系统的开阔陆架环境中，河流三角洲固有的大规模确定性自生作用也可以发挥作用。(2)水跃周期性退缩与三角洲前缘离散旋回沉积具有明显的同步性。海岸波浪的作用产生了明显的层理作用。(3)供沙率与供水率之比控制着河道撕裂的长期格局，进而控制着岸线形态。

Autostratigraphy of shelf deltas growing under intense sediment dispersion has been explored by means of model experiments. The following particular notions are noteworthy.(1) Even in an open shelf setting where sediment is intensely dispersed but is not removed far away from the coastal system, large-scale deterministic autogenesis inherent to river deltas can go functionally. (2) There exists conspicuous synchronism between periodical recession of hydraulic jumps and discrete cyclic sedimentation of delta foreset. The action of coastal waves functions to bring distinct bedding. (3) The ratio of sediment supply rate to water supply rate controls a long-term pattern of channel avulsion and thereby shoreline configuration too.