古地理学报2025，Vol.27Issue(4)：965-984,20.DOI:10.7605/gdlxb.2025.061
砾石质曲流河探地雷达相刻画及沉积模式研究
Ground penetrating radar facies characterization and sedimentary model study of gravelly meandering river
摘要
Abstract
The meandering river sand bodies exhibit rapid lateral variability and feature complex and heterogeneous internal architectures.In this study,ground-penetrating radar(GPR)was employed in conjunction with a combined plan-view and cross-sectional approach to investigate sedimentary patterns in gravel-dominated meandering river segments of the Hutubi and Irtysh Rivers in Xinjiang.Interpretations of GPR profiles were supported by modern sedimentological observations,UAV imagery,and remote sensing data.Four distinct GPR facies were identified:(1)continuous subparallel low-to-medium amplitude re-flections corresponding to floodplain deposits;(2)continuous flat-topped to convex-based low-to-medium amplitude reflections indicative of abandoned channels;(3)continuous inclined medium-to-high ampli-tude reflections characteristic of point bars;and(4)discontinuous inclined high-amplitude reflections associated with lag deposits.Through an integrated analysis of the vertical and lateral sedimentary evolution and their interactions in gravel-bed meandering systems,a multi-phase depositional model was developed.This model supports the construction of a three-dimensional geological framework,providing refined archi-tectural configurations and quantitative geological information that offer valuable guidance for reservoir pre-diction and modeling in meandering fluvial systems.关键词
曲流河/探地雷达/沉积微相/沉积模式/呼图壁河/额尔齐斯河/新疆Key words
gravelly meandering river/GPR(ground penetrating radar)/sedimentary microfa-cies/sedimentary model/Hutubi River/Irtysh River/Xinjiang分类
天文与地球科学引用本文复制引用
韩海波,姚宗全,王威,德勒恰提·加娜塔依,谢宗瑞,汪勇,杨帆,赵文硕..砾石质曲流河探地雷达相刻画及沉积模式研究[J].古地理学报,2025,27(4):965-984,20.基金项目
国家自然科学基金(编号:41902109)和新疆维吾尔自治区天山英才项目(编号:2023TSYCCX0002)联合资助.[Co-funded by the National Natural Science Foundation of China(No.41902109),Tianshan Talent Project of Xinjiang Uygur Autonomous Region(No.2023TSYCCX0002)] （编号:41902109）
