宏观-局部环境变量对海底水道地貌形态与迁移演化的协同控制作用

沉积环境演化对深海弯曲水道沉积过程的控制作用是目前国际沉积学的研究热点。本次研究以新西兰Taranaki盆地第四系弯曲水道为实例解剖对象，以地震地貌学、高精度层序地层学和地质统计学为主要理论和研究方法，结合经典层序地层划分和水道结构层次解析，建立实例区第四系高精度等时地层格架，定量分析海底水道的几何形态和时空迁移演化，探索宏观环境变量和局部环境变量对海底水道演化的协同控制作用。本次研究具有重要的理论意义和实践价值：⑴建立深海地层的高精度等时地层格架，揭示水道的内部结构与地貌形态差异以及水道的迁移演化规律，探索宏观环境因素变化和局部环境因素变化对水道内部结构和迁移演化的协同影响机制，探明海底水道的深海环境-沉积效应，充实深海环境和深海沉积学理论；⑵ 揭示的海底水道内部结构、水道的迁移规律将有助于理解和预测海底水道储层叠置样式变化，有助于实现海底水道砂体的钻前预知，减少深海勘探损失。

The controlling effect of sedimentary environment evolution on the deposition process of submarine sinuous channel is the focus research field of international sedimentology. The Quaternary sinuous channel of Taranaki basin in New Zealand was taken as a case study. Taking seismic geomorphology, high-precision sequence stratigraphy and geostatistics as the main theories and research methods, combining with the classical sequence stratigraphic division and the analysis of the channel structure hierarchy, the author will establish the high-precision isochronous stratigraphic framework of the Quaternary system of the Taranaki basin. The geomorphology and migration evolution of submarine sinuous channel will be quantitatively analyzed to find the collaborative control effect of macro-environmental variables and local-environmental variables on submarine channel evolution. This research has important theoretical significance and industrial application value: ⑴We will establish the high accuracy isochronous stratigraphic framework of deep-sea strata, reveal the differences in the internal architecture and geomorphology of the sinuous channel and the migration and evolution of the sinuous channel, and explore the deep-sea environment & sedimentation effect of the submarine channel. The above research results will improve the deep-sea environment and deep-sea sedimentology theory. ⑵ The revealed internal architecture and migration law of the submarine channel will be helpful to understand and predict the change of the stacking pattern of the submarine sinuous channel, to realize the prediction of the sand body of the submarine channel before drilling, and to reduce the loss of deep-sea exploration.