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卫星影像技术的进步和Google Earth等软件的研发为地质学家提供了俯瞰现代地质体的“眼睛”。大量卫星影像表明,大型扇三角洲群的三角洲前缘之上常流经一条来自另一物源方向的河流。在影像资料和钻探资料的分析基础之上,结合河套盆地沉积体系,总结多物源条件下扇三角洲—曲流河二元结构形成条件。实例研究表明,扇三角洲—曲流河二元结构形成条件苛刻,物源方向、湖盆规模和湖平面变化是影响二元结构形成的重要因素。
Progress in satellite imagery and development of software such as Google Earth provide geologists with “eyes” overlooking modern geologic bodies. A large number of satellite images show that the upper fan delta of the large fan delta often flows over a river from another source. Based on the analysis of the image data and the drilling data, the formation conditions of the fan delta - meandering river under the multiple provenance conditions are summarized based on the sedimentary system of the Hetao basin. The case study shows that the formation conditions of the fan delta - meandering river are very serious, and the orientation of the source, the size of the lake basin and the lake level are the important factors that affect the formation of the binary structure.