川西地区晚侏罗世浅水三角洲沉积特征及主控因素

以川西地区晚侏罗世前陆盆地发育的浅水三角洲为例，充分利用地震数据和测井、录井等资料，阐明了前陆盆地发育的浅水三角洲沉积特征及主控因素。结果表明：川西地区晚侏罗世浅水三角洲沉积体系具有长轴、短轴方向物源共存的特点，并且在不同沉积阶段，长轴、短轴方向物源体系供给能力具有差异；浅水三角洲主要受自旋回作用和异旋回作用等因素控制，其中幕式构造抬升对浅水三角洲的控制作用是前陆盆地区别于拗陷盆地和断陷盆地的主要特征。此研究完善了浅水三角洲理论在陆相湖盆中的应用，对其他前陆盆地发育的浅水三角洲研究具有借鉴意义。

Sedimentary Characteristics and Its Main Controlling Factors of the Late Jurassic Shallow-Water Delta in Western Sichuan Depression

Taking the Late Jurassic shallow-water deltas developed in the foreland basin of western Sichuan area as cases and using integrated geological data of seismic profiles and well logs, the paper clarifies the sedimentary characteristics and its controls of the shallow-water deltas. The results show that the shallow-water delta systems in the foreland basin of western Sichuan are characterized by “coexistence of provenances along the long axis and short axis”, furthermore, during different depositional periods the supply capacity of the provenance were different along the long and short axises; the shallow-water deltas are mainly controlled by auto-cycle and allo-cycle, among which the control of episodic tectonic uplift on the shallow-water deltas is the main feature to distinguish depression basin and rifted basin. The study perfects the application of shallow-water delta theory in lacustrine basins and provides references for the studies on shallow-water delta developed in other foreland basins